/* =============================================================
   M6娱乐馆 · /assets/site.css
   共享外壳：reset / 令牌 / 中文排版 / 页头 / 页脚 / 基础组件
   色彩节奏：深空黑 → 夜紫墨 → 深紫板 → 紫蚀边框 → 霓虹紫 → 淡紫辉光
   电光青 = 状态与可交互；暖金 = 每屏唯一关键动作
   ============================================================= */

/* ---------- 1. reset ---------- */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%;scroll-behavior:smooth;}
body,h1,h2,h3,h4,p,ul,ol,li,dl,dd,dt,figure,blockquote{margin:0;}
ul,ol{list-style:none;padding:0;}
img,svg,video{max-width:100%;height:auto;display:block;}
a{color:inherit;}
button{font:inherit;color:inherit;}
[hidden]{display:none !important;}

/* ---------- 2. 设计令牌 ---------- */
:root{
  --ink-900:#08060F;
  --ink-850:#0C0918;
  --ink-800:#120C22;
  --ink-700:#1C1236;
  --line:#2A1B4D;
  --neon:#6D3BF5;
  --neon-soft:#A97BFF;
  --cyan:#37E6D9;
  --gold:#F2C36B;
  --text:#C9C4D8;
  --text-dim:#8B85A0;
  --white:#FFFFFF;

  --font-sans:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:"JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,"Courier New",monospace;

  --fs-display:clamp(2.6rem,6.2vw,4.75rem);
  --fs-h2:clamp(1.75rem,3.4vw,2.75rem);
  --fs-h3:clamp(1.15rem,1.8vw,1.45rem);
  --fs-body:clamp(1rem,0.5vw + 0.85rem,1.125rem);
  --fs-label:0.75rem;

  --shell:1280px;
  --gutter:clamp(18px,4vw,48px);
  --radius:2px;
  --ease:cubic-bezier(.22,.7,.2,1);

  --glow-neon:0 18px 44px -20px rgba(109,59,245,.95);
  --glow-cyan:0 0 12px rgba(55,230,217,.45);
  --glow-gold:0 0 18px rgba(242,195,107,.35);
}

/* ---------- 3. 基础与中文排版 ---------- */
body{
  min-height:100vh;
  background-color:var(--ink-900);
  background-image:
    radial-gradient(70vw 55vh at 12% -10%, rgba(109,59,245,.20), transparent 62%),
    radial-gradient(52vw 42vh at 100% 2%, rgba(55,230,217,.09), transparent 60%),
    radial-gradient(64vw 52vh at 50% 122%, rgba(109,59,245,.14), transparent 66%);
  background-repeat:no-repeat;
  color:var(--text);
  font-family:var(--font-sans);
  font-size:var(--fs-body);
  font-weight:400;
  line-height:1.85;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
#main-content{position:relative;z-index:1;display:block;}
h1,h2,h3,h4{
  color:var(--white);
  font-weight:900;
  line-height:1.1;
  letter-spacing:-.02em;
  text-wrap:balance;
}
h1{font-size:var(--fs-display);}
h2{font-size:var(--fs-h2);}
h3{font-size:var(--fs-h3);}
p{text-wrap:pretty;}
strong,b{color:var(--white);font-weight:700;}
::selection{background:rgba(109,59,245,.55);color:var(--white);}

:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:var(--radius);}

.skip-link{
  position:absolute;left:var(--gutter);top:-70px;z-index:200;
  padding:10px 18px;background:var(--gold);color:#1A1206;
  font-weight:700;font-size:.9rem;text-decoration:none;border-radius:var(--radius);
  transition:top .18s var(--ease);
}
.skip-link:focus{top:12px;}

/* ---------- 4. 布局工具 ---------- */
.shell{width:min(var(--shell),100% - var(--gutter) * 2);margin-inline:auto;}

.grid-12{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:clamp(16px,2vw,28px);}
.span-3{grid-column:span 3;}
.span-4{grid-column:span 4;}
.span-5{grid-column:span 5;}
.span-6{grid-column:span 6;}
.span-7{grid-column:span 7;}
.span-8{grid-column:span 8;}
.span-12{grid-column:span 12;}

.visually-hidden{position:absolute!important;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0;}
.is-hidden{display:none !important;}
.is-filtered{display:none !important;}

/* ---------- 5. 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 20px;border:1px solid var(--line);border-radius:var(--radius);
  background:transparent;color:var(--white);
  font-family:var(--font-sans);font-size:.9rem;font-weight:700;letter-spacing:.02em;
  text-decoration:none;cursor:pointer;
  transition:transform .14s var(--ease),box-shadow .14s var(--ease),background-color .14s var(--ease),color .14s var(--ease),border-color .14s var(--ease);
}
.btn--neon{
  background:linear-gradient(140deg,var(--neon),#4A21C4);
  border-color:rgba(169,123,255,.55);
  box-shadow:var(--glow-neon);
}
.btn--neon:hover{transform:translateY(-2px);box-shadow:0 24px 46px -20px rgba(109,59,245,1);}
.btn--gold{color:var(--gold);border-color:rgba(242,195,107,.5);box-shadow:var(--glow-gold);}
.btn--gold:hover{background:rgba(242,195,107,.14);color:#FFE3A9;transform:translateY(-2px);}
.btn--ghost{color:var(--text);border-color:var(--line);background:rgba(28,18,54,.5);}
.btn--ghost:hover{color:var(--white);border-color:var(--neon-soft);background:rgba(28,18,54,.9);}
.btn:active{transform:translateY(0);}

/* ---------- 6. 页头 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:linear-gradient(180deg,rgba(8,6,15,.97),rgba(8,6,15,.9));
  border-bottom:1px solid var(--line);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
}

.masthead{
  max-height:50px;overflow:hidden;
  background:linear-gradient(90deg,rgba(28,18,54,.92),rgba(12,9,24,.55) 55%,rgba(28,18,54,.92));
  border-bottom:1px solid rgba(42,27,77,.9);
  transition:max-height .28s var(--ease),opacity .2s linear,border-color .2s linear;
}
.site-header.is-condensed .masthead{max-height:0;opacity:0;border-color:transparent;}
.masthead__inner{
  width:min(var(--shell),100% - var(--gutter) * 2);margin-inline:auto;
  min-height:44px;display:flex;align-items:center;justify-content:space-between;gap:16px;
  font-family:var(--font-mono);font-size:var(--fs-label);letter-spacing:.1em;
}
.masthead__note{
  display:inline-flex;align-items:center;gap:10px;
  color:var(--text-dim);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}
.masthead__note::before{
  content:"";flex:0 0 auto;width:20px;height:1px;
  background:var(--neon);box-shadow:0 0 8px rgba(109,59,245,.9);
}
.masthead__links{display:flex;align-items:center;gap:14px;flex:0 0 auto;}
.masthead__link{
  color:var(--text);text-decoration:none;padding-bottom:2px;
  border-bottom:1px solid transparent;
  transition:color .12s var(--ease),border-color .12s var(--ease);
}
.masthead__link:hover{color:var(--cyan);border-bottom-color:var(--cyan);}
.masthead__divider{width:1px;height:12px;background:var(--line);}

.nav-bar__inner{
  position:relative;
  width:min(var(--shell),100% - var(--gutter) * 2);margin-inline:auto;
  min-height:68px;display:flex;align-items:center;gap:clamp(14px,2.6vw,40px);
  transition:min-height .22s var(--ease);
}
.site-header.is-condensed .nav-bar__inner{min-height:58px;}

.brand{display:inline-flex;align-items:center;gap:12px;text-decoration:none;flex:0 0 auto;}
.brand__mark{
  position:relative;display:grid;place-items:center;
  width:42px;height:42px;flex:0 0 auto;
  border:1px solid var(--neon);border-radius:var(--radius);
  background:linear-gradient(145deg,rgba(109,59,245,.6),rgba(8,6,15,.35));
  box-shadow:inset 0 0 0 1px rgba(255,255,255,.06),0 0 24px -8px rgba(109,59,245,1);
  color:var(--white);
  font-family:var(--font-mono);font-weight:700;font-size:.95rem;letter-spacing:.02em;
}
.brand__mark::after{
  content:"";position:absolute;inset:4px;
  border-top:1px solid rgba(55,230,217,.55);
  border-left:1px solid rgba(55,230,217,.55);
}
.brand__text{display:flex;flex-direction:column;line-height:1.15;}
.brand__name{color:var(--white);font-size:1.05rem;font-weight:900;letter-spacing:-.01em;}
.brand__sub{
  font-family:var(--font-mono);font-size:10px;letter-spacing:.16em;
  color:var(--neon-soft);text-shadow:0 0 10px rgba(169,123,255,.5);
}

.nav{display:flex;align-items:center;gap:clamp(14px,2vw,28px);margin-left:auto;}
.nav__list{display:flex;align-items:center;gap:clamp(8px,1.5vw,22px);}
.nav__item{position:relative;}
.nav__link{
  display:inline-flex;align-items:baseline;gap:6px;
  padding:9px 2px;text-decoration:none;color:var(--text);
  font-size:.95rem;font-weight:500;letter-spacing:.01em;
  border-bottom:2px solid transparent;
  transition:color .12s var(--ease),border-color .12s var(--ease),transform .12s var(--ease);
}
.nav__index{
  font-family:var(--font-mono);font-size:10px;letter-spacing:.06em;
  color:var(--text-dim);transition:color .12s var(--ease);
}
.nav__link:hover{color:var(--white);border-bottom-color:rgba(109,59,245,.6);transform:translateY(-1px);}
.nav__link:hover .nav__index{color:var(--cyan);}
.nav__link[aria-current="page"]{
  color:var(--white);border-bottom-color:var(--neon);
  box-shadow:0 8px 20px -14px rgba(109,59,245,1);
}
.nav__link[aria-current="page"] .nav__index{color:var(--neon-soft);}
.nav__cta{flex:0 0 auto;padding:9px 16px;font-size:.85rem;}

.nav-toggle{
  display:none;align-items:center;gap:10px;margin-left:auto;
  padding:10px 14px;border:1px solid var(--line);border-radius:var(--radius);
  background:rgba(28,18,54,.65);color:var(--white);
  font-size:.85rem;font-weight:700;cursor:pointer;
  transition:border-color .14s var(--ease),background-color .14s var(--ease);
}
.nav-toggle:hover{border-color:var(--neon-soft);background:rgba(28,18,54,.95);}
.nav-toggle__icon{display:grid;gap:4px;width:18px;}
.nav-toggle__bar{
  display:block;height:2px;width:100%;background:currentColor;
  transition:transform .2s var(--ease),opacity .16s linear;
}
.nav-toggle__bar:nth-child(2){width:72%;}
.site-header[data-open] .nav-toggle__bar:nth-child(1){transform:translateY(6px) rotate(45deg);}
.site-header[data-open] .nav-toggle__bar:nth-child(2){opacity:0;}
.site-header[data-open] .nav-toggle__bar:nth-child(3){transform:translateY(-6px) rotate(-45deg);}
.nav-toggle__label{font-family:var(--font-mono);font-size:11px;letter-spacing:.12em;}

.scroll-rail{
  position:absolute;left:0;right:0;bottom:-1px;display:block;
  height:2px;background:rgba(42,27,77,.6);overflow:hidden;
}
.scroll-rail__fill{
  display:block;height:100%;width:0;
  background:linear-gradient(90deg,var(--neon),var(--cyan));
  box-shadow:0 0 12px rgba(55,230,217,.6);
  transition:width .1s linear;
}

/* ---------- 7. 页脚 ---------- */
.site-footer{
  position:relative;margin-top:clamp(56px,9vw,120px);
  border-top:1px solid var(--line);
  background:linear-gradient(180deg,rgba(18,12,34,.55),var(--ink-900) 42%),var(--ink-900);
}

.feedback-dock{
  border-bottom:1px solid var(--line);
  background:linear-gradient(90deg,rgba(109,59,245,.18),rgba(8,6,15,0) 70%);
}
.feedback-dock__bar{
  width:min(var(--shell),100% - var(--gutter) * 2);margin-inline:auto;
  min-height:56px;display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
}
.feedback-dock__hint{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--font-mono);font-size:var(--fs-label);letter-spacing:.1em;
  color:var(--text-dim);
}
.feedback-dock__dot{
  width:8px;height:8px;border-radius:50%;background:var(--cyan);
  box-shadow:0 0 10px var(--cyan);animation:dockPulse 2.4s ease-in-out infinite;
}
@keyframes dockPulse{0%,100%{opacity:1;}50%{opacity:.3;}}
.feedback-dock__toggle{
  display:inline-flex;align-items:center;gap:10px;
  padding:8px 14px;border:1px solid var(--line);border-radius:var(--radius);
  background:rgba(28,18,54,.6);color:var(--white);
  font-size:.85rem;font-weight:700;cursor:pointer;
  transition:border-color .14s var(--ease),background-color .14s var(--ease),color .14s var(--ease);
}
.feedback-dock__toggle:hover{border-color:var(--cyan);color:var(--cyan);background:rgba(28,18,54,.95);}
.feedback-dock__toggle-text{font-family:var(--font-mono);font-size:12px;letter-spacing:.1em;}
.feedback-dock__chev{
  width:8px;height:8px;
  border-right:1.5px solid currentColor;border-bottom:1.5px solid currentColor;
  transform:rotate(45deg) translate(-2px,-2px);
  transition:transform .2s var(--ease);
}
.feedback-dock__toggle[aria-expanded="true"] .feedback-dock__chev{transform:rotate(-135deg) translate(-2px,-2px);}
.feedback-dock__panel{
  width:min(var(--shell),100% - var(--gutter) * 2);margin-inline:auto;
  padding:4px 0 30px;
  animation:dockIn .24s var(--ease) both;
}
@keyframes dockIn{from{opacity:0;transform:translateY(-6px);}to{opacity:1;transform:none;}}
.feedback-dock__steps{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;}
.feedback-dock__step{
  padding:16px 18px;
  border:1px solid var(--line);border-left:2px solid var(--cyan);
  border-radius:var(--radius);
  background:rgba(28,18,54,.6);
}
.feedback-dock__step-label{
  font-family:var(--font-mono);font-size:11px;letter-spacing:.12em;
  color:var(--cyan);text-shadow:var(--glow-cyan);
}
.feedback-dock__step-text{margin-top:8px;font-size:.9rem;line-height:1.75;color:var(--text);}
.feedback-dock__foot{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  margin-top:20px;
}
.feedback-dock__foot-text{font-size:.88rem;color:var(--text-dim);}

.footer-grid{
  width:min(var(--shell),100% - var(--gutter) * 2);margin-inline:auto;
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1.35fr;
  gap:clamp(22px,3vw,48px);
  padding:clamp(36px,5vw,64px) 0 clamp(28px,4vw,48px);
}
.footer-col{min-width:0;}
.footer-col__title{
  margin-bottom:16px;
  font-family:var(--font-mono);font-size:var(--fs-label);font-weight:700;
  letter-spacing:.16em;color:var(--neon-soft);
  text-shadow:0 0 10px rgba(169,123,255,.45);
}
.footer-tagline{margin:16px 0 14px;max-width:34ch;font-size:.92rem;line-height:1.8;color:var(--text-dim);}
.footer-stamp{
  font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;color:var(--text-dim);
}
.footer-list{display:grid;gap:10px;}
.footer-list__item{min-width:0;}
.footer-link{
  display:inline-flex;align-items:center;gap:9px;
  font-size:.92rem;color:var(--text);text-decoration:none;
  transition:color .12s var(--ease);
}
.footer-link::before{
  content:"";flex:0 0 auto;width:6px;height:1px;background:var(--line);
  transition:width .16s var(--ease),background-color .16s var(--ease);
}
.footer-link:hover{color:var(--white);}
.footer-link:hover::before{width:16px;background:var(--cyan);box-shadow:var(--glow-cyan);}
.footer-contact{display:grid;gap:12px;}
.footer-contact__row{display:grid;grid-template-columns:58px minmax(0,1fr);gap:12px;align-items:baseline;}
.footer-contact__key{
  font-family:var(--font-mono);font-size:11px;letter-spacing:.12em;color:var(--text-dim);
}
.footer-contact__val{margin:0;font-size:.92rem;color:var(--text);overflow-wrap:anywhere;}
.footer-meta{border-top:1px solid var(--line);background:rgba(12,9,24,.75);}
.footer-meta__inner{
  width:min(var(--shell),100% - var(--gutter) * 2);margin-inline:auto;
  display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;
  padding:16px 0;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;color:var(--text-dim);
}
.footer-meta__geo{color:var(--text-dim);}
.footer-meta__icp{color:var(--text-dim);}

/* ---------- 8. 基础组件 ---------- */
.section{position:relative;padding:clamp(40px,7vw,96px) 0;}
.section__head{
  display:flex;align-items:flex-end;justify-content:space-between;
  gap:20px;flex-wrap:wrap;margin-bottom:clamp(22px,3vw,40px);
}
.section__num{
  display:inline-flex;align-items:center;gap:12px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.16em;
  color:var(--neon-soft);text-shadow:0 0 10px rgba(169,123,255,.4);
}
.section__num::after{
  content:"";width:clamp(40px,8vw,110px);height:1px;
  background:linear-gradient(90deg,var(--neon),transparent);
}
.section__title{margin-top:10px;font-size:var(--fs-h2);}
.section__desc{max-width:54ch;font-size:.95rem;color:var(--text-dim);}
.rule{height:1px;border:0;background:linear-gradient(90deg,var(--line),transparent);}

.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.16em;
  color:var(--neon-soft);text-shadow:0 0 10px rgba(169,123,255,.4);
}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--cyan);box-shadow:var(--glow-cyan);}

.panel{
  position:relative;padding:clamp(18px,2.4vw,30px);
  border:1px solid var(--line);border-radius:var(--radius);
  background:rgba(18,12,34,.72);
}
.panel::before,.panel::after{content:"";position:absolute;width:12px;height:12px;border:1px solid var(--neon);}
.panel::before{top:-1px;left:-1px;border-right:0;border-bottom:0;}
.panel::after{bottom:-1px;right:-1px;border-left:0;border-top:0;}

.card{
  position:relative;display:flex;flex-direction:column;gap:12px;
  padding:clamp(18px,2.2vw,26px);
  border:1px solid var(--line);border-radius:var(--radius);
  background:linear-gradient(160deg,rgba(28,18,54,.85),rgba(12,9,24,.85));
  transition:transform .18s var(--ease),border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.card:hover{transform:translateY(-3px);border-color:rgba(109,59,245,.6);box-shadow:0 26px 50px -32px rgba(109,59,245,1);}
.card__num{font-family:var(--font-mono);font-size:11px;letter-spacing:.16em;color:var(--cyan);text-shadow:var(--glow-cyan);}
.card__title{font-size:1.1rem;font-weight:800;letter-spacing:-.01em;}
.card__text{font-size:.93rem;line-height:1.8;color:var(--text-dim);}
.card__meta{
  display:flex;flex-wrap:wrap;gap:10px;margin-top:auto;padding-top:12px;
  border-top:1px solid var(--line);
  font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;color:var(--text-dim);
}

.tag{
  display:inline-flex;align-items:center;gap:8px;
  padding:7px 12px;border:1px solid var(--line);border-radius:var(--radius);
  background:rgba(28,18,54,.55);color:var(--text);
  font-family:var(--font-mono);font-size:12px;letter-spacing:.08em;
  text-shadow:0 0 8px rgba(169,123,255,.35);
}
.tag--cyan{color:var(--cyan);border-color:rgba(55,230,217,.35);background:rgba(55,230,217,.08);}
.tag--gold{color:var(--gold);border-color:rgba(242,195,107,.35);background:rgba(242,195,107,.08);}

.tagwall{display:flex;flex-wrap:wrap;gap:10px;}
.tagwall__btn{
  appearance:none;cursor:pointer;
  padding:8px 14px;border:1px solid var(--line);border-radius:var(--radius);
  background:rgba(28,18,54,.5);color:var(--text);
  font-family:var(--font-mono);font-size:12px;letter-spacing:.1em;
  text-shadow:0 0 8px rgba(169,123,255,.3);
  transition:color .14s var(--ease),border-color .14s var(--ease),background-color .14s var(--ease),transform .14s var(--ease),box-shadow .14s var(--ease);
}
.tagwall__btn:hover{color:var(--white);border-color:var(--neon-soft);transform:translateY(-1px);}
.tagwall__btn[aria-pressed="true"]{
  color:var(--white);border-color:var(--neon);
  background:linear-gradient(140deg,rgba(109,59,245,.9),rgba(74,33,196,.6));
  box-shadow:0 14px 28px -18px rgba(109,59,245,1);
}

.stat{display:flex;flex-direction:column;gap:6px;}
.stat__num{
  font-family:var(--font-mono);font-weight:700;letter-spacing:-.01em;
  font-size:clamp(1.6rem,3vw,2.4rem);color:var(--white);
}
.stat__label{font-family:var(--font-mono);font-size:11px;letter-spacing:.12em;color:var(--text-dim);}

.link-more{
  display:inline-flex;align-items:center;gap:8px;padding-bottom:2px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.12em;
  color:var(--cyan);text-decoration:none;border-bottom:1px solid rgba(55,230,217,.4);
  transition:color .14s var(--ease),border-color .14s var(--ease);
}
.link-more::after{content:"→";transition:transform .16s var(--ease);}
.link-more:hover{color:var(--white);border-bottom-color:var(--white);}
.link-more:hover::after{transform:translateX(4px);}

.breadcrumb{font-family:var(--font-mono);font-size:12px;letter-spacing:.1em;color:var(--text-dim);}
.breadcrumb__list{display:flex;flex-wrap:wrap;align-items:center;gap:10px;}
.breadcrumb__item{display:inline-flex;align-items:center;gap:10px;}
.breadcrumb__item + .breadcrumb__item::before{content:"/";color:var(--line);}
.breadcrumb__link{color:var(--text-dim);text-decoration:none;transition:color .12s var(--ease);}
.breadcrumb__link:hover{color:var(--cyan);}
.breadcrumb__current{color:var(--text);}

.prose{max-width:68ch;font-size:var(--fs-body);line-height:1.85;color:var(--text);}
.prose > * + *{margin-top:1.1em;}
.prose h2{font-size:var(--fs-h2);margin-top:1.6em;padding-left:16px;border-left:2px solid var(--neon);}
.prose h3{font-size:var(--fs-h3);margin-top:1.5em;color:var(--neon-soft);}
.prose ul,.prose ol{display:grid;gap:.5em;padding-left:1.2em;}
.prose ul li{list-style:none;position:relative;padding-left:18px;}
.prose ul li::before{content:"";position:absolute;left:0;top:.85em;width:8px;height:1px;background:var(--cyan);}
.prose ol{counter-reset:prose;padding-left:0;}
.prose ol li{counter-increment:prose;list-style:none;position:relative;padding-left:34px;}
.prose ol li::before{
  content:counter(prose,decimal-leading-zero);position:absolute;left:0;top:.1em;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.08em;color:var(--neon-soft);
}
.prose a{color:var(--cyan);text-decoration:underline;text-underline-offset:4px;text-decoration-thickness:1px;}
.prose a:hover{color:var(--white);}
.prose blockquote{margin:1.8em 0;padding:4px 0 4px 20px;border-left:2px solid var(--cyan);color:var(--neon-soft);}
.prose code{font-family:var(--font-mono);font-size:.9em;color:var(--cyan);}
.prose hr{border:0;height:1px;background:linear-gradient(90deg,var(--line),transparent);margin:2em 0;}

.media-frame{
  position:relative;overflow:hidden;
  border:1px solid var(--line);border-radius:var(--radius);
  background:linear-gradient(150deg,var(--ink-700),var(--ink-900));
}
.media-frame img{width:100%;height:100%;object-fit:cover;object-position:center;display:block;}
.media-frame::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(180deg,rgba(109,59,245,.14),rgba(8,6,15,.5));
}
.media-frame--wide{aspect-ratio:16/9;}
.media-frame--tall{aspect-ratio:3/4;}
.media-frame--square{aspect-ratio:1/1;}
.media-frame--band{aspect-ratio:21/9;}
.media-frame--glow{border-color:rgba(109,59,245,.7);box-shadow:0 30px 70px -40px rgba(109,59,245,1);}
.media-frame__ph{
  position:absolute;inset:0;display:grid;place-items:center;text-align:center;padding:18px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.18em;color:rgba(201,196,216,.6);
  background-image:
    repeating-linear-gradient(90deg,rgba(109,59,245,.14) 0 1px,transparent 1px 64px),
    repeating-linear-gradient(0deg,rgba(109,59,245,.14) 0 1px,transparent 1px 64px),
    radial-gradient(70% 62% at 50% 42%,rgba(109,59,245,.3),transparent 72%);
}
.media-frame__cap{
  position:absolute;left:0;bottom:0;z-index:2;
  padding:10px 14px;
  border-top:1px solid var(--line);border-right:1px solid var(--line);
  background:rgba(8,6,15,.75);
  font-family:var(--font-mono);font-size:11px;letter-spacing:.12em;color:var(--text);
}

.has-js [data-reveal]{opacity:0;transform:translateY(14px);transition:opacity .5s var(--ease),transform .5s var(--ease);}
.has-js [data-reveal].is-visible{opacity:1;transform:none;}

/* ---------- 9. 响应式 ---------- */
@media (max-width:1100px){
  .nav__link{font-size:.9rem;}
  .nav__index{display:none;}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr;}
  .footer-col--brand{grid-column:span 3;}
}
@media (max-width:900px){
  .nav-toggle{display:inline-flex;}
  .nav{
    position:absolute;left:0;right:0;top:100%;z-index:70;
    flex-direction:column;align-items:stretch;gap:0;
    margin-left:0;padding:10px var(--gutter) 22px;
    max-height:calc(100vh - 110px);overflow-y:auto;
    background:linear-gradient(180deg,rgba(12,9,24,.99),rgba(8,6,15,.99));
    border-bottom:1px solid var(--line);
    box-shadow:0 46px 70px -44px rgba(0,0,0,.95);
    opacity:0;visibility:hidden;transform:translateY(-10px);pointer-events:none;
    transition:opacity .2s var(--ease),transform .2s var(--ease),visibility .2s linear;
  }
  .site-header[data-open] .nav{opacity:1;visibility:visible;transform:none;pointer-events:auto;}
  .nav__list{flex-direction:column;align-items:stretch;gap:0;}
  .nav__item{border-bottom:1px solid rgba(42,27,77,.6);}
  .nav__link{
    display:flex;padding:15px 2px 15px 14px;
    font-size:1rem;border-bottom:0;border-left:2px solid transparent;
  }
  .nav__link:hover{transform:none;border-bottom-color:transparent;border-left-color:rgba(109,59,245,.6);}
  .nav__link[aria-current="page"]{
    border-bottom-color:transparent;border-left-color:var(--neon);
    background:linear-gradient(90deg,rgba(109,59,245,.2),transparent 70%);
    box-shadow:none;
  }
  .nav__index{display:inline;color:var(--neon-soft);}
  .nav__cta{margin-top:18px;justify-content:center;padding:12px 18px;}
  .feedback-dock__steps{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:26px;}
  .footer-col--brand{grid-column:span 2;}
}
@media (max-width:860px){
  .grid-12{grid-template-columns:repeat(2,minmax(0,1fr));}
  .span-3,.span-4,.span-5,.span-6,.span-7,.span-8,.span-12{grid-column:span 2;}
  .section__head{align-items:flex-start;}
}
@media (max-width:640px){
  .masthead__note{font-size:10px;letter-spacing:.06em;}
  .masthead__divider{display:none;}
  .masthead__links{gap:10px;font-size:10px;}
  .brand__sub{display:none;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-col--brand{grid-column:span 1;}
  .feedback-dock__bar{min-height:auto;padding:14px 0;}
  .grid-12{grid-template-columns:minmax(0,1fr);}
  .span-3,.span-4,.span-5,.span-6,.span-7,.span-8,.span-12{grid-column:span 1;}
}

/* ---------- 10. 动效退化 ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    transition-delay:0ms !important;
  }
  .has-js [data-reveal]{opacity:1;transform:none;}
  .scroll-rail__fill{transition:none;}
}