/* ==========================================================================
   新葡萄京中心 — 共享样式表 /assets/site.css
   果园清晨长卷：葡萄紫主调 · 米白长卷 · 粗边框 + 硬阴影 · 藤蔓进度线
   ========================================================================== */

/* 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,h5,p,ul,ol,li,figure,figcaption,blockquote,dl,dd{margin:0;}
ul,ol{padding:0;list-style:none;}
img,svg,video{display:block;max-width:100%;height:auto;}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;}
a{color:inherit;text-decoration:none;}
table{border-collapse:collapse;width:100%;}
[hidden]{display:none !important;}

/* 2. Tokens --------------------------------------------------------------- */
:root{
  --grape:#6B3FA0;
  --grape-deep:#4A2A70;
  --grape-soft:#B79DE0;
  --green:#8FD14F;
  --green-soft:#D9F2C0;
  --orange:#FF9F45;
  --cream:#F7F4EE;
  --white:#FFFFFF;
  --ink:#2B2233;
  --muted:#6E6478;

  --bd:2px solid var(--ink);
  --bd-soft:2px solid var(--grape-soft);
  --shadow:6px 6px 0 0 var(--ink);
  --shadow-soft:6px 6px 0 0 var(--grape-soft);
  --shadow-hover:4px 4px 0 0 var(--ink);
  --radius:2px;

  --wrap:1220px;
  --ease:cubic-bezier(.2,.7,.3,1);

  --serif:"Noto Serif SC","Source Han Serif SC","Songti SC","SimSun",serif;
  --sans:"Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --mono:"JetBrains Mono","IBM Plex Mono",ui-monospace,Menlo,Consolas,monospace;
}

/* 3. Base typography ------------------------------------------------------ */
body{
  display:flex;
  flex-direction:column;
  min-height:100vh;
  background:var(--cream);
  color:var(--ink);
  font-family:var(--sans);
  font-size:17px;
  font-weight:400;
  line-height:1.75;
  letter-spacing:.01em;
}
#main-content{flex:1 1 auto;display:block;scroll-margin-top:140px;}

h1,h2,h3,h4{font-family:var(--serif);font-weight:800;line-height:1.22;letter-spacing:-.01em;color:inherit;}
h1{font-size:clamp(2.1rem,5vw,3.5rem);}
h2{font-size:clamp(1.6rem,3.2vw,2.5rem);}
h3{font-size:clamp(1.2rem,2vw,1.5rem);}
h4{font-size:1.05rem;}

p{text-wrap:pretty;}
a{transition:color .16s var(--ease),border-color .16s var(--ease),background-color .16s var(--ease);}
::selection{background:var(--orange);color:var(--ink);}

.numeric,.mono{
  font-family:var(--mono);
  font-weight:700;
  letter-spacing:.02em;
  font-variant-numeric:tabular-nums;
}

:focus-visible{outline:2px solid var(--orange);outline-offset:2px;}

/* 4. Layout helpers ------------------------------------------------------- */
.container{
  width:100%;
  max-width:var(--wrap);
  margin-inline:auto;
  padding-inline:clamp(18px,4vw,32px);
}
.section{padding:clamp(38px,6vw,74px) 0;}
.section--tight{padding-block:clamp(20px,3vw,34px);}
.section--white{background:var(--white);}
.section--grape{background:var(--grape);color:var(--cream);}

.section__band{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:14px;
  padding:10px 0;
  border-top:2px solid var(--ink);
  border-bottom:2px solid var(--ink);
  margin-bottom:clamp(18px,2.6vw,30px);
}
.section--grape .section__band{border-color:var(--cream);}
.section__num{
  font-family:var(--mono);
  font-weight:700;
  font-size:15px;
  letter-spacing:.1em;
  padding:4px 10px;
  background:var(--grape-deep);
  color:var(--cream);
  border:2px solid var(--ink);
}
.section--grape .section__num{background:var(--cream);color:var(--grape-deep);border-color:var(--cream);}

.eyebrow{font-size:13px;letter-spacing:.24em;color:var(--muted);}
.section--grape .eyebrow{color:var(--grape-soft);}
.lede{font-size:clamp(1.05rem,1.6vw,1.2rem);line-height:1.7;max-width:46ch;}

.grid{display:grid;gap:clamp(16px,2.4vw,26px);}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr));}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr));}
.grid--sidebar{grid-template-columns:minmax(0,1.5fr) minmax(0,1fr);align-items:start;}

.breadcrumbs{margin-top:22px;}
.breadcrumbs__list{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13.5px;color:var(--muted);}
.breadcrumbs__list li+li::before{content:"/";margin-right:8px;color:var(--grape-soft);}
.breadcrumbs__list a:hover{color:var(--grape);}

/* 5. Buttons / chips / tags ---------------------------------------------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:11px 20px;
  font-family:var(--sans);
  font-size:15px;
  font-weight:600;
  letter-spacing:.06em;
  line-height:1.2;
  color:var(--ink);
  background:var(--white);
  border:var(--bd);
  border-radius:var(--radius);
  box-shadow:var(--shadow);
  transition:transform .16s var(--ease),box-shadow .16s var(--ease),background-color .16s var(--ease),color .16s var(--ease);
}
.btn:hover{transform:translate(2px,2px);box-shadow:var(--shadow-hover);}
.btn:active{transform:translate(4px,4px);box-shadow:2px 2px 0 0 var(--ink);}
.btn--primary{background:var(--grape);color:var(--white);}
.btn--primary:hover{background:var(--grape-deep);}
.btn--green{background:var(--green);color:var(--ink);}
.btn--ghost{background:transparent;}
.btn--ghost:hover{background:var(--cream);}

.version-chip{
  display:inline-flex;
  align-items:baseline;
  gap:8px;
  padding:6px 12px;
  background:var(--grape-deep);
  color:var(--cream);
  border:2px solid var(--ink);
  box-shadow:3px 3px 0 0 var(--ink);
}
.version-chip__label{font-size:12px;letter-spacing:.14em;color:rgba(247,244,238,.8);}
.version-chip__num{font-family:var(--mono);font-weight:700;font-size:18px;letter-spacing:.02em;color:var(--orange);}

.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:3px 10px;
  font-size:12.5px;
  letter-spacing:.1em;
  background:var(--cream);
  color:var(--ink);
  border:2px solid var(--ink);
}
.tag--green{background:var(--green);}
.tag--orange{background:var(--orange);}
.tag--grape{background:var(--grape);color:var(--white);}

/* 6. Cards / steps / index ------------------------------------------------ */
.card{
  background:var(--white);
  border:var(--bd);
  box-shadow:var(--shadow);
  padding:clamp(18px,2.4vw,26px);
  transition:transform .16s var(--ease),box-shadow .16s var(--ease);
}
.card--soft{border-color:var(--grape-soft);box-shadow:var(--shadow-soft);}
.card--link:hover{transform:translate(2px,2px);box-shadow:var(--shadow-hover);}
.card__head{display:flex;align-items:baseline;justify-content:space-between;gap:12px;margin-bottom:10px;}
.card__title{font-family:var(--serif);font-size:20px;font-weight:700;}
.card__body{font-size:15.5px;color:var(--muted);}

.steps{display:grid;gap:14px;}
.step{
  display:grid;
  grid-template-columns:auto minmax(0,1fr);
  gap:16px;
  align-items:start;
  padding:16px 20px 16px 16px;
  background:var(--white);
  border:var(--bd);
  border-left:8px solid var(--grape-soft);
  box-shadow:var(--shadow);
  transition:transform .16s var(--ease),box-shadow .16s var(--ease),border-color .16s var(--ease);
}
.step:hover{transform:translate(2px,2px);box-shadow:var(--shadow-hover);}
.step__num{
  font-family:var(--mono);
  font-weight:700;
  font-size:26px;
  line-height:1;
  color:var(--grape);
  min-width:2.2ch;
}
.step__title{font-family:var(--serif);font-size:19px;font-weight:700;}
.step__body{margin-top:4px;font-size:15.5px;color:var(--muted);}
.step[data-state="done"]{border-left-color:var(--green);}
.step[data-state="done"] .step__num{background:var(--green);color:var(--ink);padding:2px 6px;}
.step[data-current="true"]{border-left-color:var(--orange);}
.step[data-current="true"] .step__num{background:var(--orange);color:var(--ink);padding:2px 6px;}
.step__toggle{
  margin-top:8px;
  padding-bottom:2px;
  font-size:13.5px;
  letter-spacing:.08em;
  color:var(--grape);
  border-bottom:2px solid var(--grape-soft);
}
.step__toggle[aria-expanded="true"]{color:var(--grape-deep);border-bottom-color:var(--orange);}
.step__panel{margin-top:10px;font-size:15px;color:var(--ink);}
.step__panel[hidden]{display:none;}

.quick-index{
  background:var(--white);
  border:var(--bd);
  box-shadow:var(--shadow);
  padding:clamp(18px,3vw,28px);
}
.quick-index__grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:18px 26px;}
.quick-index__item{display:block;padding:10px 0;border-top:2px solid var(--cream);}
.quick-index__item:hover{border-top-color:var(--orange);}
.quick-index__meta{font-size:13.5px;color:var(--muted);}

/* 7. Media containers ----------------------------------------------------- */
.media{
  position:relative;
  overflow:hidden;
  aspect-ratio:4/3;
  background:var(--cream);
  border:var(--bd);
  box-shadow:var(--shadow);
}
.media img{width:100%;height:100%;object-fit:cover;}
.media--wide{aspect-ratio:16/9;}
.media--tall{aspect-ratio:3/4;}
.media--square{aspect-ratio:1/1;}
.media__placeholder{
  position:absolute;
  inset:0;
  display:grid;
  place-items:center;
  padding:16px;
  text-align:center;
  background:linear-gradient(135deg,var(--cream) 0%,var(--green-soft) 100%);
  color:var(--grape);
  font-size:13px;
  letter-spacing:.18em;
}
.media__label{
  position:absolute;
  left:-2px;
  bottom:-2px;
  padding:6px 12px;
  background:var(--grape);
  color:var(--white);
  font-family:var(--mono);
  font-size:13px;
  letter-spacing:.04em;
  border:2px solid var(--ink);
}
.media__caption{margin-top:10px;font-size:13.5px;color:var(--muted);}

/* 8. Prose ---------------------------------------------------------------- */
.prose{max-width:70ch;font-size:17.5px;line-height:1.8;}
.prose>*+*{margin-top:1.2em;}
.prose h2,.prose h3{margin-top:1.7em;}
.prose ul,.prose ol{display:grid;gap:.6em;}
.prose ul li{position:relative;padding-left:22px;}
.prose ul li::before{
  content:"";
  position:absolute;
  left:0;
  top:.6em;
  width:10px;
  height:10px;
  background:var(--green);
  border:2px solid var(--ink);
}
.prose ol{counter-reset:pl;}
.prose ol li{position:relative;padding-left:34px;counter-increment:pl;}
.prose ol li::before{
  content:counter(pl,decimal-leading-zero);
  position:absolute;
  left:0;
  top:0;
  font-family:var(--mono);
  font-weight:700;
  color:var(--grape);
}
.prose a{
  text-decoration:underline;
  text-decoration-color:var(--grape-soft);
  text-decoration-thickness:2px;
  text-underline-offset:3px;
}
.prose a:hover{text-decoration-color:var(--orange);color:var(--grape-deep);}

/* 9. Skip link + scroll progress ----------------------------------------- */
.skip-link{
  position:absolute;
  left:12px;
  top:-72px;
  z-index:200;
  padding:10px 16px;
  font-size:15px;
  background:var(--ink);
  color:var(--cream);
  border:2px solid var(--orange);
  transition:top .18s var(--ease);
}
.skip-link:focus,.skip-link:focus-visible{top:12px;}

.scroll-progress{
  position:absolute;
  top:0;
  left:0;
  right:0;
  height:3px;
  z-index:5;
  pointer-events:none;
}
.scroll-progress__bar{
  display:block;
  height:100%;
  width:0;
  background:linear-gradient(90deg,var(--grape) 0%,var(--green) 55%,var(--orange) 100%);
  transition:width .08s linear;
}
.scroll-progress[data-progress="idle"] .scroll-progress__bar{opacity:.35;}

/* 10. Header -------------------------------------------------------------- */
.site-header{
  position:sticky;
  top:0;
  z-index:90;
  background:var(--white);
  border-bottom:2px solid var(--ink);
}
.site-header::after{
  content:"";
  position:absolute;
  left:0;
  right:0;
  bottom:-2px;
  height:4px;
  background:linear-gradient(90deg,var(--grape) 0 52%,var(--green) 52% 78%,var(--orange) 78% 100%);
  pointer-events:none;
}
.site-header__inner{
  width:100%;
  max-width:var(--wrap);
  margin-inline:auto;
  padding-inline:clamp(18px,4vw,32px);
}

.masthead{padding:22px 0 14px;text-align:center;}
.masthead__kicker{font-size:12px;letter-spacing:.28em;color:var(--muted);}
.masthead__logo{
  display:inline-block;
  margin:8px 0 6px;
  font-family:var(--serif);
  font-weight:900;
  font-size:clamp(30px,5.4vw,54px);
  line-height:1.05;
  letter-spacing:.06em;
  color:var(--grape-deep);
}
.masthead__logo:hover{color:var(--grape);}
.masthead__tagline{font-size:14px;letter-spacing:.18em;color:var(--grape);}
.masthead__tagline::before,.masthead__tagline::after{content:"—";margin:0 10px;color:var(--grape-soft);}

.site-header__bar{
  display:grid;
  grid-template-columns:1fr auto 1fr;
  grid-template-rows:auto;
  align-items:center;
  gap:14px;
  padding:10px 0 12px;
  border-top:2px solid var(--ink);
}

.nav-toggle{
  display:none;
  align-items:center;
  gap:8px;
  padding:9px 12px;
  font-size:14px;
  color:var(--ink);
  background:var(--white);
  border:2px solid var(--ink);
  box-shadow:3px 3px 0 0 var(--ink);
  transition:transform .16s var(--ease),box-shadow .16s var(--ease),background-color .16s var(--ease);
}
.nav-toggle:hover{transform:translate(2px,2px);box-shadow:2px 2px 0 0 var(--ink);}
.nav-toggle__icon{position:relative;width:16px;height:2px;background:var(--ink);}
.nav-toggle__icon::before,.nav-toggle__icon::after{content:"";position:absolute;left:0;width:16px;height:2px;background:var(--ink);}
.nav-toggle__icon::before{top:-5px;}
.nav-toggle__icon::after{top:5px;}
.nav-toggle__label{font-size:14px;letter-spacing:.08em;white-space:nowrap;}
.nav-toggle[aria-expanded="true"]{background:var(--grape);color:var(--white);}
.nav-toggle[aria-expanded="true"] .nav-toggle__icon,
.nav-toggle[aria-expanded="true"] .nav-toggle__icon::before,
.nav-toggle[aria-expanded="true"] .nav-toggle__icon::after{background:var(--white);}

.site-nav{grid-column:2;grid-row:1;justify-self:center;min-width:0;}
.site-nav__list{display:flex;align-items:center;gap:clamp(10px,2.2vw,26px);}
.site-nav__link{
  display:inline-block;
  padding:6px 2px 8px;
  font-family:var(--serif);
  font-size:17px;
  font-weight:700;
  letter-spacing:.08em;
  color:var(--ink);
  border-bottom:3px solid transparent;
}
.site-nav__link:hover{color:var(--grape);border-bottom-color:var(--grape-soft);}
.site-nav__link[aria-current="page"]{color:var(--grape-deep);border-bottom-color:var(--orange);}

.site-header__actions{
  grid-column:3;
  grid-row:1;
  justify-self:end;
  display:flex;
  align-items:center;
  gap:12px;
}

/* 11. Footer -------------------------------------------------------------- */
.site-footer{
  background:var(--grape-deep);
  color:var(--cream);
  border-top:2px solid var(--ink);
}
.site-footer__inner{
  max-width:var(--wrap);
  margin-inline:auto;
  padding:clamp(34px,5vw,58px) clamp(18px,4vw,32px) 24px;
}
.site-footer__top{
  display:grid;
  grid-template-columns:minmax(240px,1fr) minmax(0,1.6fr);
  gap:36px;
  padding-bottom:26px;
  border-bottom:2px dashed rgba(247,244,238,.28);
}
.site-footer__logo{
  display:inline-block;
  font-family:var(--serif);
  font-weight:900;
  font-size:clamp(24px,3vw,30px);
  letter-spacing:.06em;
  color:var(--cream);
}
.site-footer__logo:hover{color:var(--orange);}
.site-footer__sync{margin-top:10px;max-width:34ch;font-size:15px;color:rgba(247,244,238,.84);}
.site-footer__note{margin-top:8px;font-size:13px;letter-spacing:.12em;color:var(--grape-soft);}

.site-footer__columns{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;}
.footer-col__title{
  margin-bottom:12px;
  font-family:var(--sans);
  font-size:13px;
  font-weight:600;
  letter-spacing:.22em;
  color:var(--green);
}
.footer-col__list{display:grid;gap:8px;}
.footer-col__list a{
  display:inline-block;
  font-size:15px;
  color:rgba(247,244,238,.9);
  border-bottom:2px solid transparent;
  padding-bottom:1px;
}
.footer-col__list a:hover{color:var(--orange);border-bottom-color:var(--orange);}

.site-footer__bottom{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:10px 28px;
  padding-top:18px;
  font-size:13.5px;
  color:rgba(247,244,238,.74);
}
.site-footer__contact{font-family:var(--mono);letter-spacing:.02em;}
.site-footer__address{max-width:34ch;}
.site-footer__legal{letter-spacing:.06em;}
.site-footer__copy{letter-spacing:.06em;}

/* 12. Motion -------------------------------------------------------------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .5s var(--ease),transform .5s var(--ease);}
.reveal.is-visible{opacity:1;transform:none;}

/* 13. Responsive ---------------------------------------------------------- */
@media (max-width:1180px){
  .site-nav__list{gap:14px;}
  .site-nav__link{font-size:16px;}
}

@media (max-width:980px){
  .masthead{padding:16px 0 10px;}
  .masthead__kicker{font-size:11px;letter-spacing:.2em;}
  .masthead__logo{margin:6px 0 4px;}

  .site-header__bar{
    grid-template-columns:auto minmax(0,1fr);
    grid-template-rows:auto auto;
    gap:8px 12px;
    padding:10px 0 12px;
  }
  .nav-toggle{display:inline-flex;grid-column:1;grid-row:1;}
  .site-header__actions{grid-column:2;grid-row:1;justify-self:end;gap:8px;}

  .site-nav{
    grid-column:1 / -1;
    grid-row:2;
    justify-self:stretch;
    min-width:0;
    overflow-x:auto;
    overflow-y:hidden;
    scrollbar-width:none;
    -ms-overflow-style:none;
  }
  .site-nav::-webkit-scrollbar{display:none;}
  .site-nav__list{flex-wrap:nowrap;width:max-content;gap:16px;}
  .site-nav__link{font-size:15.5px;white-space:nowrap;padding:6px 0;}
  .site-nav[data-open]{overflow:visible;}
  .site-nav[data-open] .site-nav__list{
    flex-wrap:wrap;
    width:auto;
    gap:4px 18px;
    padding-top:10px;
    border-top:2px dashed var(--grape-soft);
  }

  .grid--2,.grid--3,.grid--sidebar{grid-template-columns:minmax(0,1fr);}
  .site-footer__top{grid-template-columns:minmax(0,1fr);gap:26px;}
  .site-footer__columns{grid-template-columns:repeat(2,minmax(0,1fr));gap:22px;}
}

@media (max-width:680px){
  .nav-toggle{padding:9px 10px;}
  .nav-toggle__label{display:none;}
  .version-chip{padding:6px 10px;}
  .version-chip__label{display:none;}
  .btn{padding:10px 14px;font-size:14px;}
  .site-footer__columns{grid-template-columns:minmax(0,1fr);gap:18px;}
  .site-footer__bottom{flex-direction:column;align-items:flex-start;gap:6px;}
  .step{grid-template-columns:minmax(0,1fr);gap:8px;}
}

@media (max-width:400px){
  .masthead__logo{font-size:28px;}
  .site-nav__link{font-size:15px;}
}

/* 14. Reduced motion ------------------------------------------------------ */
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .reveal{opacity:1;transform:none;}
  .btn:hover,.card--link:hover,.step:hover,.nav-toggle:hover{transform:none;}
  .scroll-progress__bar{transition:none;}
}