:root{
  --grape:#6B2FA0;
  --grape-deep:#3E1A5E;
  --grape-lift:#A65BE0;
  --vine:#2E8B6D;
  --vine-mist:#8FC9B5;
  --paper:#F5F0E6;
  --paper-white:#FFFDF7;
  --ink:#1F1B24;
  --ink-soft:#6E6574;
  --gold:#D9B36C;

  --font-title:"Noto Serif SC","Songti SC",STSong,SimSun,serif;
  --font-body:"Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --font-mono:"JetBrains Mono",SFMono-Regular,Consolas,monospace;

  --maxw:1240px;
  --gutter:clamp(1rem,4vw,3rem);
  --edge:2px solid var(--grape-deep);
  --hair:1px solid rgba(62,26,94,.18);
  --shadow-card:0 14px 0 -10px rgba(62,26,94,.16),0 2px 10px -6px rgba(62,26,94,.3);
}

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

html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}

body{
  margin:0;
  font-family:var(--font-body);
  font-size:16.5px;
  line-height:1.78;
  color:var(--ink);
  background-color:var(--paper);
  background-image:radial-gradient(rgba(62,26,94,.07) 1px,transparent 1px);
  background-size:24px 24px;
  -webkit-font-smoothing:antialiased;
}

img,picture,svg,video{display:block;max-width:100%}
img{height:auto}
a{color:var(--grape);text-decoration:none}
p{margin:0 0 1em}
ul,ol{margin:0 0 1em;padding-left:1.25em}
hr{border:0;border-top:var(--hair);margin:2rem 0}

h1,h2,h3,h4,h5,h6{
  font-family:var(--font-title);
  font-weight:700;
  line-height:1.25;
  letter-spacing:.01em;
  color:var(--grape-deep);
  margin:0 0 .55em;
}
h1{font-size:clamp(32px,2rem + 1.5vw,52px)}
h2{font-size:clamp(24px,1.2rem + .85vw,32px)}
h3{font-size:clamp(19px,1rem + .4vw,24px)}

::selection{background:var(--grape-lift);color:var(--paper-white)}
:focus-visible{outline:3px solid var(--vine);outline-offset:3px}

.skip-link{
  position:fixed;
  top:-72px;left:14px;z-index:300;
  padding:.72rem 1.1rem;
  background:var(--grape-deep);color:var(--paper-white);
  font-family:var(--font-mono);font-size:12px;letter-spacing:.08em;
  transition:top .2s ease;
}
.skip-link:focus{top:14px}

.wrap{
  width:100%;
  max-width:var(--maxw);
  margin-inline:auto;
  padding-inline:var(--gutter);
}

#main-content{
  display:block;
  padding-block:clamp(1.5rem,3vw,2.5rem) clamp(2.5rem,5vw,4rem);
}

/* ============ 框架式头部 ============ */
.site-head{
  position:sticky;top:0;z-index:60;
  background:var(--paper-white);
  border-bottom:var(--edge);
  box-shadow:0 10px 26px -24px rgba(62,26,94,.9);
}
.site-head::before{
  content:"";display:block;height:6px;
  background:linear-gradient(90deg,
    var(--grape) 0 38%,
    var(--vine) 38% 54%,
    var(--gold) 54% 64%,
    var(--grape-deep) 64% 100%);
}
.site-head__bar{padding-block:.3rem}
.site-head__bar-inner{
  display:flex;align-items:center;gap:1rem;
  min-height:72px;
}

.brand{
  display:flex;align-items:center;gap:.75rem;
  color:inherit;
  padding:.35rem 0;
}
.brand__mark{
  display:grid;place-items:center;
  width:54px;height:44px;flex:0 0 auto;
  background:var(--grape);color:var(--paper-white);
  font-family:var(--font-mono);font-size:12.5px;font-weight:700;letter-spacing:.06em;
  clip-path:polygon(0 0,100% 0,100% calc(100% - 13px),calc(100% - 13px) 100%,0 100%);
  transition:background .22s ease;
}
.brand:hover .brand__mark{background:var(--vine)}
.brand__text{display:flex;flex-direction:column;line-height:1.28;min-width:0}
.brand__name{
  font-family:var(--font-title);
  font-size:clamp(17px,.95rem + .3vw,21px);
  font-weight:700;color:var(--grape-deep);letter-spacing:.03em;
}
.brand__desc{
  font-family:var(--font-mono);
  font-size:10.5px;letter-spacing:.06em;
  color:var(--ink-soft);
  white-space:nowrap;
}

.site-tools{margin-left:auto;display:flex;align-items:center;gap:.5rem}
.tool-btn{
  font-family:var(--font-mono);
  font-size:11.5px;letter-spacing:.05em;
  padding:.55rem .72rem;
  color:var(--grape-deep);
  background:var(--paper);
  border:1px solid rgba(62,26,94,.28);
  cursor:pointer;
  transition:background .2s ease,color .2s ease,border-color .2s ease,transform .2s ease;
}
.tool-btn:hover{background:var(--grape);color:var(--paper-white);border-color:var(--grape)}
.tool-btn:active{transform:translateY(1px)}
.tool-btn.is-done{background:var(--vine);color:var(--paper-white);border-color:var(--vine)}

.nav-toggle{
  display:none;align-items:center;gap:.55rem;
  margin-left:auto;
  padding:.6rem .8rem;
  border:0;cursor:pointer;
  background:var(--grape-deep);color:var(--paper-white);
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.1em;
  transition:background .2s ease;
}
.nav-toggle:hover{background:var(--grape)}
.nav-toggle__label{line-height:1}
.nav-toggle__bars{display:flex;flex-direction:column;gap:3px;width:16px}
.nav-toggle__bars i{
  display:block;height:2px;width:100%;
  background:currentColor;
  transition:transform .22s ease,opacity .22s ease;
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(1){transform:translateY(5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(3){transform:translateY(-5px) rotate(-45deg)}

.site-nav{
  display:block;
  background:var(--paper-white);
  border-top:1px solid rgba(62,26,94,.16);
}
.site-nav__inner{display:flex;align-items:stretch;gap:1.1rem}
.site-nav__legend{
  margin:0;flex:0 0 auto;
  display:flex;align-items:center;
  padding-right:1.1rem;
  font-family:var(--font-mono);font-size:10px;letter-spacing:.2em;
  color:var(--ink-soft);
  border-right:var(--hair);
}
.site-nav__list{
  display:flex;flex-wrap:wrap;align-items:center;
  gap:.15rem 1.45rem;
  margin:0;padding:0;list-style:none;
  counter-reset:navno;
}
.site-nav__list li{counter-increment:navno}
.site-nav__list a{
  position:relative;
  display:inline-flex;align-items:baseline;gap:.45rem;
  padding:.85rem .1rem;
  font-size:14.5px;font-weight:500;letter-spacing:.02em;
  color:var(--grape-deep);
  transition:color .2s ease;
}
.site-nav__list a::before{
  content:counter(navno,decimal-leading-zero);
  font-family:var(--font-mono);font-size:10px;letter-spacing:.05em;
  color:var(--gold);
  transition:color .2s ease;
}
.site-nav__list a::after{
  content:"";position:absolute;left:0;right:0;bottom:.42rem;
  height:2px;background:var(--vine);
  transform:scaleX(0);transform-origin:left center;
  transition:transform .26s cubic-bezier(.2,.7,.3,1);
}
.site-nav__list a:hover{color:var(--grape)}
.site-nav__list a:hover::after{transform:scaleX(1)}
.site-nav__list a[aria-current="page"]{color:var(--grape)}
.site-nav__list a[aria-current="page"]::before{color:var(--grape-lift)}
.site-nav__list a[aria-current="page"]::after{transform:scaleX(1);background:var(--grape)}

.site-head__progress{
  position:absolute;left:0;right:0;bottom:0;
  height:2px;pointer-events:none;
}
.site-head__progress span{
  display:block;height:100%;width:0;
  background:var(--grape-lift);
  transition:width .12s linear;
}

/* ============ 深色手册封底式页脚 ============ */
.site-foot{
  position:relative;
  background-color:var(--grape-deep);
  background-image:radial-gradient(rgba(245,240,230,.07) 1px,transparent 1px);
  background-size:24px 24px;
  color:rgba(245,240,230,.86);
  border-top:6px solid var(--grape);
}
.site-foot__inner{
  display:grid;
  grid-template-columns:1.55fr .8fr .8fr 1.15fr;
  gap:2.25rem 2.5rem;
  padding-block:3.25rem 2.25rem;
}
.site-foot__lead{min-width:0}
.site-foot__brand{
  margin:0 0 .7rem;
  font-family:var(--font-title);
  font-size:clamp(20px,1.15rem + .6vw,27px);
  color:var(--paper-white);letter-spacing:.03em;line-height:1.3;
}
.site-foot__summary{
  margin:0 0 1.1rem;
  max-width:34ch;
  font-size:14.5px;line-height:1.85;
  color:rgba(245,240,230,.76);
}
.site-foot__seal{
  display:inline-block;
  margin:0;
  padding:.38rem .65rem;
  font-family:var(--font-mono);font-size:10.5px;letter-spacing:.14em;
  color:var(--gold);
  border:1px solid rgba(217,179,108,.5);
  transform:rotate(-1.6deg);
}
.site-foot__title{
  margin:0 0 .95rem;
  font-family:var(--font-mono);font-size:10.5px;letter-spacing:.22em;
  color:var(--vine-mist);
}
.site-foot__col{min-width:0}
.site-foot__links{list-style:none;margin:0;padding:0;display:grid;gap:.55rem}
.site-foot__links a{
  position:relative;
  display:inline-block;
  padding-bottom:2px;
  font-size:14.5px;
  color:rgba(245,240,230,.82);
  transition:color .2s ease;
}
.site-foot__links a::after{
  content:"";position:absolute;left:0;bottom:0;
  width:100%;height:1px;background:var(--gold);
  transform:scaleX(0);transform-origin:left center;
  transition:transform .26s ease;
}
.site-foot__links a:hover{color:var(--paper-white)}
.site-foot__links a:hover::after{transform:scaleX(1)}
.site-foot__contact{display:grid;gap:.55rem;align-content:start;min-width:0}
.site-foot__contact-line{
  margin:0;
  display:grid;
  grid-template-columns:3.2em 1fr;
  gap:.55rem;
  font-size:13.5px;line-height:1.7;
  color:rgba(245,240,230,.86);
  overflow-wrap:anywhere;
}
.site-foot__key{
  font-family:var(--font-mono);font-size:10.5px;letter-spacing:.1em;
  color:var(--gold);
  padding-top:.28em;
}
.site-foot__note{
  margin:.35rem 0 0;
  font-size:12.5px;line-height:1.75;
  color:rgba(245,240,230,.6);
}
.site-foot__legal{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:.5rem 1.6rem;
  padding-block:1.1rem 1.6rem;
  border-top:1px solid rgba(245,240,230,.18);
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.04em;
  color:rgba(245,240,230,.58);
}
.site-foot__copy,.site-foot__icp{margin:0}
.site-foot__legal-links{
  display:flex;flex-wrap:wrap;gap:.4rem 1.1rem;
  list-style:none;margin:0;padding:0;
}
.site-foot__legal-links a{color:rgba(245,240,230,.72);border-bottom:1px solid rgba(245,240,230,.28)}
.site-foot__legal-links a:hover{color:var(--vine-mist);border-color:var(--vine-mist)}

/* ============ 通用文字组件 ============ */
.kicker{
  display:inline-flex;align-items:center;gap:.6rem;
  margin:0 0 .8rem;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.2em;
  color:var(--vine);
}
.kicker::before{content:"";width:26px;height:2px;background:var(--vine)}
.section-no{
  margin:0;
  font-family:var(--font-mono);font-weight:700;
  font-size:clamp(48px,7vw,96px);
  line-height:.86;letter-spacing:-.02em;
  color:transparent;
  -webkit-text-stroke:2px var(--grape);
}
@supports not ((-webkit-text-stroke:1px #000)){
  .section-no{color:rgba(107,47,160,.22)}
}
.lede{
  margin:0 0 1.2rem;
  max-width:62ch;
  font-size:clamp(17px,1rem + .3vw,20px);
  line-height:1.8;
  color:var(--grape-deep);
}
.prose{max-width:68ch}
.prose p{margin:0 0 1.05em}
.prose h2,.prose h3{margin-top:1.8em}
.prose ul,.prose ol{padding-left:1.35em}
.prose li{margin-bottom:.4em}

/* ============ 路径条 ============ */
.crumbs{
  display:flex;flex-wrap:wrap;align-items:center;gap:.45rem;
  margin:0 0 1.5rem;
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.04em;
  color:var(--ink-soft);
}
.crumbs a{color:var(--grape);transition:color .2s ease}
.crumbs a:hover{color:var(--vine)}
.crumbs__sep{color:rgba(110,101,116,.5)}
.crumbs [aria-current="page"]{color:var(--grape-deep)}

/* ============ 网格与堆叠 ============ */
.grid{display:grid;gap:clamp(1rem,2vw,1.75rem)}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid--4{grid-template-columns:repeat(4,minmax(0,1fr))}
.grid--index{grid-template-columns:minmax(0,3fr) minmax(0,9fr)}
.stack{display:flex;flex-direction:column;gap:var(--stack-gap,1rem)}

/* ============ 卡片、贴纸、标签 ============ */
.panel{
  position:relative;
  padding:1.45rem 1.35rem;
  background:var(--paper-white);
  border:var(--edge);
  box-shadow:var(--shadow-card);
  transition:border-color .24s ease,transform .24s ease;
}
.panel:hover{border-color:var(--vine)}
.panel--tagged::before{
  content:"";position:absolute;top:0;left:0;
  width:44px;height:4px;background:var(--grape);
}
.sticker{
  display:inline-block;
  padding:.4rem .7rem;
  background:var(--grape-lift);color:var(--paper-white);
  font-family:var(--font-mono);font-size:11.5px;font-weight:700;letter-spacing:.08em;
  transform:rotate(-2.5deg);
  clip-path:polygon(0 0,100% 0,100% calc(100% - 9px),calc(100% - 9px) 100%,0 100%);
  box-shadow:0 6px 12px -8px rgba(62,26,94,.9);
  transition:transform .24s ease;
}
.sticker:hover{transform:rotate(0) translateY(-2px)}
.tag{
  display:inline-flex;align-items:center;gap:.35rem;
  padding:.28rem .55rem;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.08em;
  color:var(--grape);
  border:1px solid var(--grape);
  background:transparent;
  white-space:nowrap;
}
.tag--vine{border-color:var(--vine);color:var(--vine)}
.tag--gold{border-color:var(--gold);color:#8a6a24}
.tag--solid{background:var(--grape);border-color:var(--grape);color:var(--paper-white)}

/* ============ 按钮与链接 ============ */
.btn{
  display:inline-flex;align-items:center;gap:.5rem;
  padding:.8rem 1.35rem;
  font-family:var(--font-body);font-size:15px;font-weight:600;line-height:1.3;
  color:var(--grape-deep);
  background:var(--paper-white);
  border:2px solid var(--grape-deep);
  cursor:pointer;
  transition:background .22s ease,color .22s ease,border-color .22s ease,transform .22s ease;
}
.btn:hover{transform:translateY(-1px);border-color:var(--vine);color:var(--vine)}
.btn--primary{background:var(--grape);border-color:var(--grape);color:var(--paper-white)}
.btn--primary:hover{background:var(--grape-deep);border-color:var(--grape-deep);color:var(--paper-white)}
.btn--vine{background:var(--vine);border-color:var(--vine);color:var(--paper-white)}
.btn--vine:hover{background:#25715A;border-color:#25715A;color:var(--paper-white)}
.btn--ghost{background:transparent}
.link-arrow{
  display:inline-flex;align-items:center;gap:.4rem;
  padding-bottom:2px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;
  color:var(--grape);
  border-bottom:1px solid currentColor;
  transition:color .2s ease;
}
.link-arrow::after{content:"→";transition:transform .2s ease}
.link-arrow:hover{color:var(--vine)}
.link-arrow:hover::after{transform:translateX(3px)}

/* ============ 图片容器基础 ============ */
.media-frame{
  position:relative;display:block;overflow:hidden;
  background:var(--paper-white);
  border:var(--edge);
}
.media-frame>img,
.media-frame>picture>img{
  width:100%;height:100%;object-fit:cover;
  transition:transform .5s ease;
}
.media-frame:hover>img,
.media-frame:hover>picture>img{transform:scale(1.03)}
.media-frame--wide{aspect-ratio:16/9}
.media-frame--card{aspect-ratio:4/3}
.media-frame--square{aspect-ratio:1/1}
.media-frame--tall{aspect-ratio:3/4}
.media-frame--empty{
  background-image:repeating-linear-gradient(135deg,rgba(107,47,160,.10) 0 10px,transparent 10px 20px);
}
.media-frame__caption{
  margin:.6rem 0 0;
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.04em;
  color:var(--ink-soft);
}

/* ============ 响应式 ============ */
@media (max-width:1024px){
  .site-tools{display:none}
  .nav-toggle{display:inline-flex}
  .site-nav{
    display:none;
    border-top:var(--edge);
    background:var(--paper);
  }
  .site-nav[data-open="true"]{
    display:block;
    animation:navdrop .22s ease both;
  }
  .site-nav__inner{flex-direction:column;gap:0;padding-block:.4rem 1.1rem}
  .site-nav__legend{display:none}
  .site-nav__list{flex-direction:column;align-items:stretch;gap:0}
  .site-nav__list li+li{border-top:1px dashed rgba(62,26,94,.2)}
  .site-nav__list a{
    display:flex;width:100%;
    padding:.9rem .2rem;
    font-size:15.5px;
  }
  .site-nav__list a::after{bottom:.5rem;right:auto;width:2.5rem}
  .site-foot__inner{grid-template-columns:1fr 1fr;gap:1.75rem 2rem}
  .site-foot__lead{grid-column:1/-1}
  .site-foot__contact{grid-column:1/-1}
  .grid--index{grid-template-columns:minmax(0,1fr)}
  .grid--4{grid-template-columns:repeat(2,minmax(0,1fr))}
  .grid--3{grid-template-columns:repeat(2,minmax(0,1fr))}
}

@keyframes navdrop{
  from{opacity:0;transform:translateY(-6px)}
  to{opacity:1;transform:none}
}

@media (max-width:640px){
  body{font-size:16px}
  .site-head__bar-inner{min-height:60px;gap:.6rem}
  .brand__mark{width:46px;height:38px;font-size:11px}
  .brand__desc{display:none}
  .site-foot__inner{grid-template-columns:1fr;padding-block:2.5rem 1.75rem}
  .site-foot__legal{justify-content:flex-start;padding-block:.95rem 1.4rem}
  .grid--2,.grid--3,.grid--4{grid-template-columns:minmax(0,1fr)}
  .panel{padding:1.2rem 1.1rem}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
}