/* =========================================================
   FaceWinUnlock — 水墨宣传站
   纸：f3ede3 / 墨：17120d / 朱砂：b23b2c
   ========================================================= */
/* 纸张暗角 */
body::after{
  content:"";position:fixed;inset:0;z-index:0;pointer-events:none;
  background:radial-gradient(120% 90% at 50% 0%, transparent 55%, rgba(23,18,13,.07) 100%);
}
.cjk{letter-spacing:.02em}

/* ---------- 墨迹装饰层 ---------- */
.ink-field{position:fixed;inset:0;z-index:0;pointer-events:none;overflow:hidden}
.blot{
  position:absolute;border-radius:50%;
  background:radial-gradient(circle at 42% 38%, rgba(23,18,13,.42), rgba(23,18,13,.12) 52%, transparent 72%);
  filter:blur(14px);
  opacity:.16;
  will-change:transform;
}
.blot--a{width:38vw;height:38vw;left:-12vw;top:-10vw}
.blot--b{width:28vw;height:28vw;right:-8vw;top:16vh;opacity:.1;filter:blur(18px)}
.blot--c{width:42vw;height:42vw;left:38vw;top:120vh;opacity:.08;filter:blur(22px)}

/* ---------- 顶部导航 ---------- */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:60;
  display:flex;align-items:center;justify-content:space-between;
  padding:24px clamp(22px,4vw,56px);
}
.nav__brand{display:flex;align-items:center;gap:13px;font-weight:600;font-size:19px;letter-spacing:.03em}
.nav__mark{width:29px;height:33px;flex:none;display:block}
.seal{
  width:34px;height:34px;border-radius:3px;background:var(--seal);
  color:#fbf6ee;display:grid;place-items:center;
  font-size:16px;font-weight:900;line-height:1;
  box-shadow:0 1px 0 rgba(140,42,30,.4);
  font-family:var(--serif);
}
.nav__links{display:flex;align-items:center;gap:clamp(20px,2.6vw,38px);font-family:var(--sans);font-size:15px;font-weight:400;color:var(--muted)}
.nav__links a{position:relative;padding:6px 0;transition:color .3s var(--ease)}
.nav__links a::after{
  content:"";position:absolute;left:0;bottom:0;height:1px;width:100%;
  background:var(--ink);transform:scaleX(0);transform-origin:left;
  transition:transform .45s var(--ease);
}
.nav__links a:hover{color:var(--ink)}
.nav__links a:hover::after{transform:scaleX(1)}
.nav__cta{
  display:flex;align-items:center;
  padding:11px 0;border:0;background:transparent;
  font-family:var(--sans);font-size:14px;font-weight:500;letter-spacing:.05em;
  color:var(--ink);
}
.nav__cta::before{
  content:"";display:inline-block;width:0;height:1px;margin-right:10px;
  background:currentColor;
  transition:width .42s var(--ease);
}
.nav__cta::after{display:none}
.nav__cta:hover::before{width:3rem}
.theme-toggle{
  position:relative;display:grid;place-items:center;padding:0;
  -webkit-appearance:none;appearance:none;
  width:34px;height:34px;border:1px solid var(--line);border-radius:50%;
  background:transparent;color:var(--muted);cursor:pointer;
  transition:color .35s var(--ease),border-color .35s var(--ease),background-color .35s var(--ease);
}
.theme-toggle:hover{color:var(--ink);border-color:var(--ink);background:rgba(255,255,255,.06)}
.theme-toggle svg{
  grid-area:1 / 1;width:17px;height:17px;
  fill:none;stroke:currentColor;stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round;
  transition:opacity .4s var(--ease),transform .55s var(--ease);
}
.theme-toggle__moon{opacity:0;transform:rotate(-40deg) scale(.55)}
html[data-theme="dark"] .theme-toggle__sun{opacity:0;transform:rotate(70deg) scale(.55)}
html[data-theme="dark"] .theme-toggle__moon{opacity:1;transform:none}
.theme-toggle:focus-visible{outline:2px solid var(--seal);outline-offset:4px}
@media (max-width:820px){
  .nav{padding:18px 20px}
  .nav__brand{font-size:16px;gap:10px}
  .nav__mark{width:24px;height:27px}
  .nav__links{font-size:13.5px;gap:16px}
  .nav__cta{padding:9px 0;font-size:12.5px}
  .nav__links a:not(.nav__cta){display:none}
  .theme-toggle{width:30px;height:30px}
}

/* ---------- 进度墨线 ---------- */
.scroll-ink{
  position:fixed;top:0;left:0;height:2px;width:100%;z-index:70;
  background:var(--ink);transform:scaleX(0);transform-origin:left;
}

/* ---------- 通用容器 ---------- */
.wrap{width:min(var(--wrap),calc(100% - clamp(32px,8vw,96px)));margin-inline:auto;position:relative;z-index:2}
section{position:relative;z-index:2}

/* ---------- 首屏 ---------- */
.hero{
  min-height:100svh;display:flex;flex-direction:column;justify-content:center;
  padding:clamp(96px,14vh,150px) 0 clamp(60px,10vh,110px);
}
.hero__eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--sans);font-size:12px;letter-spacing:.34em;color:var(--muted);
  margin-bottom:clamp(20px,3.4vh,34px);text-transform:uppercase;
}
.hero__eyebrow::before{content:"";width:34px;height:1px;background:var(--ink);opacity:.5}
.hero__title{
  font-size:clamp(58px,11.2vw,152px);
  font-weight:900;line-height:.94;letter-spacing:-.035em;
  margin-left:-.02em;
}
.hero__title .ch{display:inline-block;will-change:transform,opacity,filter}
.hero__title .seal-dot{
  display:inline-block;color:var(--seal);vertical-align:baseline;
  font-size:.42em;transform:translateY(-.06em);
}
.hero__rule{
  width:min(620px,100%);height:1px;background:var(--ink);opacity:.18;
  margin:clamp(26px,4vh,44px) 0 clamp(22px,3.4vh,34px);
  transform-origin:left;
}
.hero__lede{
  max-width:34em;font-size:clamp(15px,1.5vw,18px);line-height:2;
  color:var(--ink-2);font-weight:300;
}
.hero__lede em{font-style:normal;font-weight:600;border-bottom:1px solid var(--seal);padding-bottom:1px}
.hero__acts{display:flex;flex-wrap:wrap;align-items:center;gap:18px 22px;margin-top:clamp(30px,4.6vh,44px)}
.btn-ink{
  position:relative;display:inline-flex;align-items:center;gap:12px;
  background:var(--ink);color:var(--paper);
  font-family:var(--sans);font-size:14px;font-weight:500;letter-spacing:.06em;
  padding:15px 30px;border-radius:2px;overflow:hidden;
  transition:color .4s var(--ease);
}
.btn-ink > *{position:relative;z-index:2}
.btn-ink::before{
  content:"";position:absolute;inset:0;z-index:1;
  background:var(--seal);transform:translateY(101%);
  transition:transform .5s var(--ease);
}
.btn-ink:hover::before{transform:translateY(0)}
.btn-ink .arr{transition:transform .45s var(--ease)}
.btn-ink:hover .arr{transform:translateX(4px)}
.btn-ghost{
  font-family:var(--sans);font-size:13.5px;letter-spacing:.05em;color:var(--muted);
  border-bottom:1px solid transparent;padding-bottom:3px;
  transition:color .35s var(--ease),border-color .35s var(--ease);
}
.btn-ghost:hover{color:var(--ink);border-color:var(--ink)}
.hero__social{
  position:absolute;right:clamp(6px,3vw,60px);top:clamp(88px,17vh,180px);
  display:flex;align-items:flex-start;gap:clamp(9px,1vw,14px);
}
.hero__social-label{
  writing-mode:vertical-rl;font-family:var(--sans);
  font-size:12.5px;letter-spacing:.28em;line-height:1;color:var(--muted);
  padding-top:3px;
  transition:opacity .26s var(--ease);
}
/* 头像组：重叠三分之一 → 向右散开成一排 */
.pgroup{
  --av:clamp(44px,4vw,52px);
  --ov:calc(var(--av) / 3);
  --fan:clamp(9px,1.1vw,14px);
  --step:calc(var(--av) / 3 + var(--fan));
  --hold:40ms;
  --n:3;
  position:relative;z-index:2;display:flex;flex-direction:column;align-items:center;
  cursor:pointer;outline:none;user-select:none;
  -webkit-tap-highlight-color:transparent;
}
.pav{
  position:relative;z-index:calc(var(--i) + 1);
  display:grid;place-items:center;
  width:var(--av);height:var(--av);border-radius:50%;
  border:1px solid var(--seal);background:var(--paper);color:var(--seal);
  box-shadow:0 0 0 3px var(--paper);
  pointer-events:none;will-change:transform;
  transform:translateY(0);
  transition:transform .46s var(--ease),background-color .32s var(--ease),
             color .32s var(--ease),box-shadow .32s var(--ease);
  transition-delay:calc((var(--n) - 1 - var(--i)) * var(--hold));
}
.pav + .pav{margin-top:calc(-1 * var(--ov))}
/* 悬停热区：覆盖展开后的整列与名字，避免穿过间隙时误收起 */
.pgroup::after{
  content:"";position:absolute;z-index:-1;
  left:calc(var(--av) * -0.18);right:calc(var(--av) * -1.4);
  top:calc(var(--av) * -0.18);bottom:calc(var(--step) * (1 - var(--n)));
}
.pav svg{width:56%;height:56%;pointer-events:none}
.pav--bili svg{width:62%;height:62%}
.pav__name{
  position:absolute;left:calc(100% + 10px);top:50%;
  font-family:var(--sans);font-size:10.5px;letter-spacing:.02em;line-height:1;
  color:var(--muted);white-space:nowrap;pointer-events:none;
  opacity:0;transform:translate(-4px,-50%);
  transition:opacity .3s var(--ease),transform .3s var(--ease);
  transition-delay:calc((var(--n) - 1 - var(--i)) * var(--hold));
}
.pgroup:focus-visible{outline:2px solid var(--seal);outline-offset:7px;border-radius:999px}
.pav:focus-visible{outline:2px solid var(--seal);outline-offset:4px}
.pgroup.is-open{cursor:default}
.pgroup.is-open .pav{
  pointer-events:auto;cursor:pointer;
  transform:translateY(calc(var(--i) * var(--step)));
  transition-delay:calc(var(--i) * var(--hold));
}
.pgroup.is-open .pav:hover{
  background:var(--seal);color:var(--paper);
  box-shadow:0 0 0 3px var(--paper),0 7px 16px rgba(23,18,13,.18);
  transform:translateY(calc(var(--i) * var(--step))) scale(1.06);
  transition-delay:0ms;
}
.pgroup.is-open .pav:active{
  transform:translateY(calc(var(--i) * var(--step))) scale(.96);
  transition:transform 90ms ease-out;
}
.pgroup.is-open .pav__name{
  opacity:1;transform:translate(0,-50%);pointer-events:auto;cursor:pointer;
  transition-delay:calc(var(--i) * var(--hold) + 90ms);
}
.pgroup.is-open .pav__name:hover{color:var(--seal)}
.pgroup.is-open ~ .hero__social-label{opacity:0}
.pav--more{cursor:inherit;font-family:var(--sans);font-size:13px;font-weight:500}
.pav--more[hidden]{display:none}
@media (max-width:900px){
  .hero__social{position:static;flex:none}
  .hero__social-label{display:none}
  .pgroup{--av:40px;--fan:10px}
}
@media (prefers-reduced-motion:reduce){
  .pav,.pav__name,.hero__social-label{transition-duration:.01ms;transition-delay:0ms}
}

/* ---------- 章节标题 ---------- */
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:32px;flex-wrap:wrap;margin-bottom:clamp(36px,6vh,64px)}
.sec-kicker{font-family:var(--sans);font-size:11.5px;letter-spacing:.34em;color:var(--muted-2);text-transform:uppercase;margin-bottom:14px}
.sec-title{font-size:clamp(30px,4.6vw,54px);font-weight:600;line-height:1.18;letter-spacing:-.02em}
.sec-title .mono{font-family:var(--sans);font-weight:300;color:var(--muted)}
.sec-desc{max-width:30em;color:var(--muted);font-size:14.5px;font-weight:300;line-height:2}
.brush{width:min(300px,46vw);height:10px;margin-top:18px;overflow:visible}
.brush path{fill:none;stroke:var(--ink);stroke-width:5;stroke-linecap:round;opacity:.75}

/* ---------- 理念（钉住 + 墨晕） ---------- */
.idea{min-height:100svh;display:flex;align-items:center;padding:0}
.idea__inner{display:grid;grid-template-columns:1.15fr .85fr;gap:clamp(28px,6vw,80px);align-items:center}
.idea__quote{font-size:clamp(28px,4.2vw,56px);font-weight:600;line-height:1.42;letter-spacing:-.01em}
.idea__quote .thin{font-weight:300;color:var(--muted-2)}
.idea__quote .mark{position:relative;white-space:nowrap}
.idea__quote .mark::after{
  content:"";position:absolute;left:-2%;right:-2%;bottom:.06em;height:.62em;z-index:-1;
  background:linear-gradient(90deg,rgba(178,59,44,.2),rgba(178,59,44,.06));
  transform:scaleX(0);transform-origin:left;
}
.idea__aside{border-left:1px solid var(--line);padding-left:clamp(20px,3vw,38px)}
.idea__aside p{font-size:14px;color:var(--muted);font-weight:300;line-height:2.1;margin-bottom:18px}
.idea__aside strong{color:var(--ink);font-weight:600}
.idea__src{margin-bottom:0!important}
.idea__src a{
  font-family:var(--sans);font-size:12px;letter-spacing:.08em;color:var(--muted-2);
  border-bottom:1px solid var(--line);padding-bottom:2px;
  transition:color .3s var(--ease),border-color .3s var(--ease);
}
.idea__src a:hover{color:var(--ink);border-color:var(--ink)}
.ink-orb{
  width:min(340px,60vw);aspect-ratio:1;margin-inline:auto;border-radius:50%;
  background:radial-gradient(circle at 38% 34%, rgba(23,18,13,.86), rgba(23,18,13,.5) 44%, transparent 70%);
  filter:blur(6px);opacity:.9;position:relative;
}
.ink-orb::after{
  content:"";position:absolute;inset:22%;border-radius:50%;
  border:1px solid rgba(243,237,227,.35);
}
@media (max-width:840px){.idea__inner{grid-template-columns:1fr}.ink-orb{display:none}}

/* ---------- 功能（横向滚动画廊） ---------- */
.features{min-height:100svh;display:flex;flex-direction:column;justify-content:center;padding:clamp(72px,12vh,120px) 0;overflow:hidden}
.feat-track{display:flex;gap:clamp(18px,2.6vw,32px);padding-right:clamp(32px,8vw,96px);will-change:transform}
.feat-card{
  flex:0 0 clamp(260px,30vw,360px);
  border:1px solid var(--line);border-radius:2px;
  background:linear-gradient(180deg,rgba(255,255,255,.34),rgba(255,255,255,0));
  padding:clamp(24px,3vw,36px);
  display:flex;flex-direction:column;gap:18px;
  position:relative;transition:border-color .4s var(--ease),background-color .4s var(--ease);
}
.feat-card:hover{border-color:var(--ink);background:rgba(255,255,255,.5)}
.feat-idx{font-family:var(--sans);font-size:11px;letter-spacing:.3em;color:var(--muted-2)}
.feat-name{font-size:clamp(20px,2.2vw,26px);font-weight:600;line-height:1.35}
.feat-name small{display:block;font-family:var(--sans);font-size:11px;font-weight:400;letter-spacing:.2em;color:var(--muted-2);margin-top:8px;text-transform:uppercase}
.feat-desc{font-size:13.5px;font-weight:300;color:var(--muted);line-height:2;margin-top:auto}
.feat-glyph{width:46px;height:46px;color:var(--ink)}
.feat-glyph svg{width:100%;height:100%;stroke:currentColor;fill:none;stroke-width:1.2}
.hint-x{font-family:var(--sans);font-size:11px;letter-spacing:.26em;color:var(--muted-2);align-self:flex-end;margin-top:22px}

/* ---------- 数据 ---------- */
.stats{padding:clamp(90px,16vh,160px) 0}
.stats__grid{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid var(--line)}
.stat{padding:clamp(24px,3.4vw,40px) clamp(12px,2vw,26px);border-right:1px solid var(--line)}
.stat:last-child{border-right:0}
.stat__num{font-size:clamp(40px,5.6vw,76px);font-weight:600;line-height:1;letter-spacing:-.04em}
.stat__num small{font-family:var(--sans);font-size:.26em;font-weight:400;letter-spacing:.08em;color:var(--muted);margin-left:4px}
.stat__label{font-family:var(--sans);font-size:12px;letter-spacing:.14em;color:var(--muted);margin-top:14px}
@media (max-width:760px){
  .stats__grid{grid-template-columns:repeat(2,1fr)}
  .stat:nth-child(2){border-right:0}
  .stat:nth-child(1),.stat:nth-child(2){border-bottom:1px solid var(--line)}
}

/* ---------- 下载 ---------- */
.download{padding:clamp(90px,15vh,150px) 0 clamp(70px,11vh,110px)}
.dl-grid{display:grid;grid-template-columns:1.3fr 1fr;gap:clamp(20px,3vw,38px);align-items:stretch}
.dl-main{
  position:relative;overflow:hidden;border-radius:2px;
  background:var(--ink);color:var(--paper);
  padding:clamp(32px,4.2vw,54px);
  display:flex;flex-direction:column;gap:24px;justify-content:space-between;
}
.dl-main::after{
  content:"";position:absolute;width:60%;aspect-ratio:1;right:-18%;bottom:-34%;
  border-radius:50%;
  background:radial-gradient(circle,rgba(243,237,227,.16),transparent 68%);
  transition:transform .8s var(--ease);
}
.dl-main:hover::after{transform:scale(1.25)}
.dl-main__top{display:flex;justify-content:space-between;align-items:flex-start;gap:20px}
.dl-main h3{font-size:clamp(24px,3vw,34px);font-weight:600;line-height:1.3}
.dl-main p{font-family:var(--sans);font-size:12.5px;color:rgba(243,237,227,.62);letter-spacing:.04em;margin-top:10px}
.dl-main__btn{
  display:inline-flex;align-items:center;gap:12px;align-self:flex-start;
  background:var(--paper);color:var(--ink);
  font-family:var(--sans);font-size:14px;font-weight:500;letter-spacing:.06em;
  padding:14px 28px;border-radius:2px;position:relative;z-index:2;
  transition:transform .4s var(--ease),background-color .4s var(--ease);
}
.dl-main__btn:hover{transform:translateX(4px);background:#fdf9f2}
.dl-main__acts{display:flex;flex-wrap:wrap;gap:12px;position:relative;z-index:2}
.dl-main__btn--ghost{
  background:transparent;color:var(--paper);
  border:1px solid rgba(243,237,227,.38);
}
.dl-main__btn--gold{
  background:transparent;color:#c1a362;border:2px solid #c1a362;
}
.dl-main__btn--gold,.dl-main__btn--ghost{
  border-radius:999px;overflow:hidden;
  transition:all .3s cubic-bezier(.23,1,.32,1);
}
.dl-main__btn--gold::before,.dl-main__btn--ghost::before{
  content:"";position:absolute;inset:0;margin:auto;width:50px;height:50px;
  border-radius:inherit;transform:scale(0);z-index:-1;
  background:#c1a362;
  transition:all .6s cubic-bezier(.23,1,.32,1);
}
.dl-main__btn--gold:hover,.dl-main__btn--ghost:hover{
  background:transparent;color:#17120d;transform:scale(1.08);
  border-color:#c1a362;
  box-shadow:0 0 20px rgba(193,163,98,.4);
}
.dl-main__btn--gold:hover::before,.dl-main__btn--ghost:hover::before{transform:scale(5)}
.dl-main__btn--gold:active,.dl-main__btn--ghost:active{transform:scale(1)}
.dl-side{display:grid;grid-template-columns:1fr 1fr;gap:clamp(10px,1.4vw,14px)}
.dl-row{
  flex:1;display:flex;align-items:center;justify-content:space-between;gap:16px;
  position:relative;
  border:1px solid var(--line);border-radius:2px;padding:clamp(18px,2.2vw,26px);
  transition:border-color .4s var(--ease),background-color .4s var(--ease),transform .4s var(--ease);
}
.dl-row:hover{border-color:var(--ink);background:rgba(255,255,255,.42);transform:translateX(3px)}
.dl-row__t{font-size:15.5px;font-weight:600}
.dl-row__s{font-family:var(--sans);font-size:11.5px;color:var(--muted);letter-spacing:.08em;margin-top:4px}
.dl-row__arr{font-family:var(--sans);color:var(--muted);transition:transform .4s var(--ease),color .4s var(--ease)}
.dl-row:hover .dl-row__arr{transform:translateX(3px);color:var(--ink)}
.dl-row:last-child{grid-column:1 / -1}
/* Beta 卡片：环绕光束提醒 */
@property --beam-angle{syntax:'<angle>';inherits:false;initial-value:0deg}
.dl-row--beam{
  border-color:color-mix(in srgb, var(--seal) 32%, transparent);
  background:color-mix(in srgb, var(--seal) 4%, transparent);
}
.dl-row--beam:hover{border-color:color-mix(in srgb, var(--seal) 45%, transparent)}
.dl-row--beam::before{
  content:"";position:absolute;inset:0;border-radius:inherit;padding:1px;
  background:conic-gradient(from var(--beam-angle),
    transparent 0 62%,
    color-mix(in srgb, var(--seal) 55%, transparent) 76%,
    var(--seal) 84%,
    #e8b64c 88%,
    color-mix(in srgb, #e8b64c 40%, transparent) 92%,
    transparent 97%);
  -webkit-mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);
  -webkit-mask-composite:xor;
  mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);
  mask-composite:exclude;
  animation:dl-beam 4.2s linear infinite;
  pointer-events:none;
}
@keyframes dl-beam{to{--beam-angle:360deg}}
@media (prefers-reduced-motion:reduce){
  .dl-row--beam::before{animation:none}
}
.dl-note{font-family:var(--sans);font-size:12px;line-height:1.9;color:var(--muted-2);margin-top:26px;max-width:62em}
.dl-note a{color:var(--ink);border-bottom:1px solid var(--line)}
/* 版权说明右侧：可展开头像组 */
.dl-sign{
  display:flex;align-items:center;justify-content:space-between;
  gap:clamp(24px,4vw,64px);margin-top:26px;
}
.dl-sign .dl-note{margin-top:0;flex:1}
.agroup{
  --av:46px;--ov:calc(var(--av) / 3);
  --fan:46px;--step:calc(var(--av) / 3 + var(--fan));
  --hold:40ms;--n:3;
  position:relative;display:flex;align-items:center;flex:none;
  cursor:pointer;outline:none;user-select:none;
  -webkit-tap-highlight-color:transparent;
}
.agroup__av{
  position:relative;z-index:calc(var(--i) + 1);
  display:grid;place-items:center;
  width:var(--av);height:var(--av);border-radius:50%;
  border:1px solid var(--seal);background:var(--paper);color:var(--seal);
  box-shadow:0 0 0 3px var(--paper);
  pointer-events:none;will-change:transform;
  transition:transform .46s var(--ease),background-color .32s var(--ease),
             color .32s var(--ease),box-shadow .32s var(--ease);
  transition-delay:calc((var(--n) - 1 - var(--i)) * var(--hold));
}
.agroup__av + .agroup__av{margin-left:calc(-1 * var(--ov))}
.agroup__av svg{width:56%;height:56%;pointer-events:none}
.agroup__av img{display:block;width:100%;height:100%;border-radius:50%;object-fit:cover;pointer-events:none}
.agroup__name{
  position:absolute;top:calc(100% + 7px);left:50%;
  font-family:var(--sans);font-size:9.5px;letter-spacing:0;line-height:1;
  color:var(--muted);white-space:nowrap;pointer-events:none;
  opacity:0;transform:translate(-50%,-4px);
  transition:opacity .3s var(--ease),transform .3s var(--ease);
  transition-delay:calc((var(--n) - 1 - var(--i)) * var(--hold));
}
.agroup:focus-visible{outline:2px solid var(--seal);outline-offset:7px;border-radius:999px}
.agroup__av:focus-visible{outline:2px solid var(--seal);outline-offset:4px}
.agroup.is-open{cursor:default}
.agroup.is-open .agroup__av{
  pointer-events:auto;cursor:pointer;
  transform:translateX(calc(var(--i) * var(--step)));
  transition-delay:calc(var(--i) * var(--hold));
}
.agroup.is-open .agroup__av:hover{
  background:var(--seal);color:var(--paper);
  box-shadow:0 0 0 3px var(--paper),0 7px 16px rgba(23,18,13,.18);
  transition-delay:0ms;
}
.agroup.is-open .agroup__name{
  opacity:1;transform:translate(-50%,0);pointer-events:auto;cursor:pointer;
  transition-delay:calc(var(--i) * var(--hold) + 90ms);
}
.agroup.is-open .agroup__name:hover{color:var(--seal)}
/* 靠右放置时向左散开，避免超出视口 */
.agroup.is-left.is-open .agroup__av{transform:translateX(calc(var(--i) * var(--step) * -1))}
.agroup.is-left.is-open .agroup__name{
  transition-delay:calc((var(--n) - 1 - var(--i)) * var(--hold) + 90ms);
}
/* 名字交错成两行，避免 8 个用户名挤成一条 */
.agroup.is-open .agroup__av:nth-child(even) .agroup__name{top:calc(100% + 21px)}
/* 被 +N 折叠的头像：展开后补位 */
.agroup__av--extra{display:none}
.agroup.is-open .agroup__av--extra{
  display:grid;
  animation:agroup-fade .35s var(--ease) both;
  animation-delay:calc(var(--i) * var(--hold));
}
.agroup.is-open .agroup__av--more{display:none}
@keyframes agroup-fade{from{opacity:0}to{opacity:1}}
.agroup__av--more[hidden]{display:none}
@media (max-width:820px){
  .dl-grid{grid-template-columns:1fr}
  .dl-side{grid-template-columns:1fr}
  .dl-row:last-child{grid-column:auto}
  .dl-sign{flex-direction:column;align-items:flex-start;gap:22px;padding-right:0}
  .agroup{--av:40px;--fan:22px}
  .agroup.is-left.is-open .agroup__av{transform:translateX(calc(var(--i) * var(--step)))}
}

/* ---------- 页脚 ---------- */
.foot{position:relative;z-index:2;padding:clamp(40px,7vh,70px) 0 clamp(28px,5vh,46px);border-top:1px solid var(--line-soft)}
.foot__in{display:flex;justify-content:space-between;align-items:flex-end;gap:26px;flex-wrap:wrap}
.foot__sign{font-size:clamp(26px,4vw,44px);font-weight:600;letter-spacing:-.02em;line-height:1.1}
.foot__links{display:flex;gap:24px;font-family:var(--sans);font-size:12.5px;color:var(--muted)}
.foot__links a:hover{color:var(--ink)}
.foot__legal{font-family:var(--sans);font-size:11.5px;color:var(--muted-2);margin-top:22px}

/* ---------- 墨滴切换遮罩 ---------- */
.ink-wipe{
  position:fixed;left:0;top:0;z-index:99;border-radius:50%;
  background:var(--ink);pointer-events:none;opacity:0;
  will-change:transform,opacity;
}
.wipe-logo{
  position:fixed;inset:0;z-index:100;display:grid;place-items:center;
  pointer-events:none;opacity:0;
}
.wipe-logo span{
  font-size:clamp(32px,7vw,78px);font-weight:900;color:var(--paper);
  letter-spacing:.14em;text-indent:.14em;
  writing-mode:horizontal-tb;
}

/* ---------- 夜间主题 ---------- */
html[data-theme="dark"] body::after{
  background:radial-gradient(120% 90% at 50% 0%, transparent 40%, rgba(0,0,0,.5) 100%);
}
html[data-theme="dark"] .feat-card{background:linear-gradient(180deg,rgba(255,255,255,.06),rgba(255,255,255,0))}
html[data-theme="dark"] .feat-card:hover{background:rgba(255,255,255,.09)}
html[data-theme="dark"] .dl-row:hover{background:rgba(255,255,255,.06)}
html[data-theme="dark"] .ink-orb{
  background:radial-gradient(circle at 38% 34%, rgba(165,216,255,.55), rgba(30,63,216,.35) 46%, transparent 72%);
}
html[data-theme="dark"] .dl-main{background:#0a1424;color:#e9f0ff}
html[data-theme="dark"] .dl-main p{color:rgba(233,240,255,.55)}
html[data-theme="dark"] .dl-main__btn--ghost{color:#e9f0ff}
html[data-theme="dark"] .ink-wipe{background:var(--seal-deep)}
html[data-theme="dark"] .wipe-logo span{color:#fbf6ee}

/* ---------- 入场准备：默认全部可见，JS 只负责「从无到有」 ---------- */
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001s!important;animation-iteration-count:1!important;transition-duration:.001s!important}
}