/* ============================================================
   拉菲平台注册账号 · /assets/site.css
   共享外壳：重置 / 变量 / 中文排版 / 头部 / 页脚 / 通用组件
   ============================================================ */

/* ---------- 1. 变量 ---------- */
:root{
  --wine:#6B1F2E;
  --cellar:#3A1F45;
  --gilt:#C7A45E;
  --ink:#241B1A;
  --cream:#F8F3EA;
  --mist:#B7AFA4;
  --snow:#FFFFFF;
  --amber:#A65A2E;
  --archive:#2E4B45;
  --ember:#7A2436;

  --ink-82:rgba(36,27,26,.82);
  --ink-70:rgba(36,27,26,.70);
  --ink-50:rgba(36,27,26,.50);
  --hairline:rgba(36,27,26,.14);
  --hairline-soft:rgba(36,27,26,.07);
  --gilt-line:rgba(199,164,94,.55);
  --gilt-wash:rgba(199,164,94,.12);
  --archive-wash:rgba(46,75,69,.05);
  --on-dark:rgba(255,255,255,.78);
  --on-dark-soft:rgba(255,255,255,.52);

  --font-display:"Noto Serif SC","Source Han Serif SC","Songti SC","SimSun",serif;
  --font-text:"Inter","PingFang SC","HarmonyOS Sans","Microsoft YaHei",system-ui,sans-serif;
  --font-num:"JetBrains Mono","Roboto Mono","SFMono-Regular",ui-monospace,monospace;

  --shell:1240px;
  --shell-wide:1440px;
  --shell-narrow:768px;
  --measure:38em;

  --gutter:clamp(1.15rem,4vw,3.5rem);
  --header-h:72px;
  --masthead-h:38px;

  --radius-s:4px;
  --radius-m:14px;
  --radius-l:26px;

  --ease-out:cubic-bezier(.22,.61,.36,1);
  --dur:190ms;

  --scroll-progress:0;
}

/* ---------- 2. 重置 ---------- */
*,*::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,dl,dd,figure,blockquote,fieldset{margin:0;padding:0}
ul,ol{list-style:none}
img,picture,svg,video{display:block;max-width:100%}
img{height:auto}
button,input,select,textarea{font:inherit;color:inherit}
button{background:none;border:0;cursor:pointer}
a{color:inherit;text-decoration-thickness:.06em;text-underline-offset:.18em}
table{border-collapse:collapse;border-spacing:0}
summary{list-style:none}
summary::-webkit-details-marker{display:none}
:focus-visible{outline:2px solid var(--gilt);outline-offset:2px}

/* ---------- 3. 页面与中文排版 ---------- */
body{
  display:flex;
  flex-direction:column;
  min-height:100vh;
  background:var(--cream);
  color:var(--ink);
  font-family:var(--font-text);
  font-size:1rem;
  font-weight:400;
  line-height:1.75;
  letter-spacing:.012em;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}
#main-content{
  flex:1 0 auto;
  display:block;
  scroll-margin-top:calc(var(--header-h) + 1.25rem);
}
h1,h2,h3,h4,.display{
  font-family:var(--font-display);
  color:var(--ink);
  font-weight:700;
  line-height:1.12;
  letter-spacing:.008em;
}
h1{font-size:clamp(2.4rem,6vw,4.6rem);line-height:1.05}
h2{font-size:clamp(1.6rem,3vw,2.4rem);line-height:1.25;font-weight:600}
h3{font-size:clamp(1.1rem,1.5vw,1.375rem);line-height:1.35;font-weight:600}
h4{font-size:1.0625rem;line-height:1.4;font-weight:600}
p{max-width:var(--measure)}
i,em,cite{font-style:normal}
.num,
[data-num]{
  font-family:var(--font-num);
  font-variant-numeric:tabular-nums;
  letter-spacing:.04em;
}
::selection{background:var(--wine);color:var(--snow)}

.visually-hidden{
  position:absolute!important;
  width:1px;height:1px;
  margin:-1px;padding:0;
  overflow:hidden;
  clip:rect(0 0 0 0);
  clip-path:inset(50%);
  white-space:nowrap;
  border:0;
}

/* ---------- 4. 头部 ---------- */
.skip-link{
  position:fixed;
  top:.75rem;left:.75rem;
  z-index:200;
  padding:.7rem 1.15rem;
  background:var(--ink);
  color:var(--snow);
  border:1px solid var(--gilt);
  border-radius:var(--radius-s);
  font-size:.875rem;
  letter-spacing:.04em;
  text-decoration:none;
  transform:translateY(-220%);
  transition:transform var(--dur) var(--ease-out);
}
.skip-link:focus,
.skip-link:focus-visible{transform:translateY(0)}

.site-header{
  position:fixed;
  inset:0 0 auto 0;
  z-index:100;
  color:var(--ink);
  background:transparent;
  transition:background-color 220ms var(--ease-out),color 220ms var(--ease-out),box-shadow 220ms var(--ease-out);
}
.site-header[data-scrolled]{
  background:var(--ink);
  color:var(--snow);
  box-shadow:0 22px 44px -34px rgba(36,27,26,.95);
}

.masthead{
  border-bottom:1px solid transparent;
  transition:border-color 220ms var(--ease-out);
}
.site-header[data-scrolled] .masthead{border-bottom-color:rgba(255,255,255,.11)}
.masthead__inner{
  width:100%;
  max-width:var(--shell-wide);
  margin-inline:auto;
  padding-inline:var(--gutter);
  min-height:var(--masthead-h);
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:1.5rem;
  font-family:var(--font-num);
  font-size:.75rem;
  letter-spacing:.06em;
  color:var(--ink-50);
}
.site-header[data-scrolled] .masthead__inner{color:var(--on-dark-soft)}
.masthead__note{
  max-width:none;
  margin:0;
  white-space:nowrap;
  overflow:hidden;
  text-overflow:ellipsis;
}
.masthead__utility{
  display:flex;
  align-items:center;
  gap:1.5rem;
  flex-shrink:0;
}
.masthead__utility a{
  text-decoration:none;
  border-bottom:1px solid transparent;
  padding-bottom:1px;
  transition:color var(--dur) var(--ease-out),border-color var(--dur) var(--ease-out);
}
.masthead__utility a:hover{
  color:var(--wine);
  border-bottom-color:var(--wine);
}
.site-header[data-scrolled] .masthead__utility a:hover{
  color:var(--gilt);
  border-bottom-color:var(--gilt-line);
}

.site-header__bar{position:relative}
.site-header__inner{
  width:100%;
  max-width:var(--shell-wide);
  margin-inline:auto;
  padding-inline:var(--gutter);
  min-height:var(--header-h);
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:1.75rem;
}

.brand{
  display:inline-flex;
  align-items:center;
  gap:.7rem;
  padding:.55rem 0;
  text-decoration:none;
  flex-shrink:0;
}
.brand__mark{
  width:11px;height:11px;
  border-radius:3px;
  background:linear-gradient(142deg,var(--ember) 0%,var(--wine) 48%,var(--cellar) 100%);
  box-shadow:inset 0 0 0 1px var(--gilt-line);
  flex-shrink:0;
}
.brand__text{
  font-family:var(--font-display);
  font-weight:700;
  font-size:clamp(1rem,1.4vw,1.15rem);
  letter-spacing:.03em;
}
.brand__sub{
  font-family:var(--font-num);
  font-size:.6875rem;
  letter-spacing:.08em;
  color:var(--ink-50);
}
.site-header[data-scrolled] .brand__sub{color:var(--on-dark-soft)}

.nav-toggle{
  display:none;
  align-items:center;
  gap:.55rem;
  padding:.5rem .95rem;
  border:1px solid currentColor;
  border-radius:999px;
  background:transparent;
  color:inherit;
  font-size:.8125rem;
  letter-spacing:.08em;
  transition:background-color var(--dur) var(--ease-out),color var(--dur) var(--ease-out),border-color var(--dur) var(--ease-out);
}
.nav-toggle:hover{border-color:var(--gilt);color:var(--gilt)}
.nav-toggle__bars{
  width:16px;height:10px;
  background-image:linear-gradient(currentColor,currentColor),linear-gradient(currentColor,currentColor);
  background-repeat:no-repeat;
  background-size:100% 1.5px,100% 1.5px;
  background-position:top left,bottom left;
}
.nav-toggle[aria-expanded="true"]{
  background:var(--wine);
  border-color:var(--wine);
  color:var(--snow);
}

.site-nav{display:flex;align-items:center}
.site-nav__list{
  display:flex;
  align-items:center;
  gap:clamp(1rem,2.2vw,2.25rem);
}
.site-nav__link{
  position:relative;
  display:inline-block;
  padding:.7rem .1rem;
  font-size:.9375rem;
  letter-spacing:.02em;
  text-decoration:none;
  color:inherit;
  transition:color 160ms var(--ease-out),transform 160ms var(--ease-out);
}
.site-nav__link::after{
  content:"";
  position:absolute;
  left:0;right:100%;
  bottom:.42rem;
  height:1px;
  background:var(--gilt);
  transition:right 200ms var(--ease-out),background-color 200ms var(--ease-out);
}
.site-nav__link:hover{transform:translateY(-2px)}
.site-nav__link:hover::after,
.site-nav__link:focus-visible::after{right:0}
.site-nav__link[aria-current="page"]{
  color:var(--wine);
  font-weight:600;
}
.site-nav__link[aria-current="page"]::after{
  right:0;
  height:2px;
  background:var(--wine);
}
.site-header[data-scrolled] .site-nav__link[aria-current="page"]{color:var(--gilt)}
.site-header[data-scrolled] .site-nav__link[aria-current="page"]::after{background:var(--gilt)}

body[data-hero="dark"] .site-header:not([data-scrolled]){color:var(--snow)}
body[data-hero="dark"] .site-header:not([data-scrolled]) .masthead__inner{color:var(--on-dark-soft)}
body[data-hero="dark"] .site-header:not([data-scrolled]) .brand__sub{color:var(--on-dark-soft)}
body[data-hero="dark"] .site-header:not([data-scrolled]) .site-nav__link[aria-current="page"]{color:var(--gilt)}
body[data-hero="dark"] .site-header:not([data-scrolled]) .site-nav__link[aria-current="page"]::after{background:var(--gilt)}

.scroll-meter{
  position:absolute;
  left:0;bottom:0;
  width:100%;
  height:2px;
  transform:scaleX(var(--scroll-progress));
  transform-origin:0 50%;
  background:linear-gradient(90deg,var(--ember) 0%,var(--wine) 45%,var(--gilt) 100%);
  opacity:0;
  pointer-events:none;
  transition:opacity 220ms var(--ease-out);
}
.site-header[data-scrolled] .scroll-meter{opacity:1}

/* ---------- 5. 页脚 ---------- */
.site-footer{
  margin-top:auto;
  background:var(--ink);
  color:var(--on-dark);
  border-top:1px solid var(--gilt-line);
}
.site-footer__inner{
  width:100%;
  max-width:var(--shell-wide);
  margin-inline:auto;
  padding:clamp(2.75rem,6vw,4.5rem) var(--gutter) clamp(2rem,4vw,3.25rem);
  display:grid;
  grid-template-columns:minmax(0,1.15fr) minmax(0,1.95fr) minmax(0,1.2fr);
  gap:clamp(2rem,4vw,3.5rem);
}
.site-footer__brand{display:flex;flex-direction:column;gap:.6rem}
.footer-brand__name{
  font-family:var(--font-display);
  font-weight:700;
  font-size:clamp(1.15rem,1.7vw,1.4rem);
  line-height:1.25;
  color:var(--snow);
  max-width:none;
}
.footer-brand__domain{
  font-size:.8125rem;
  letter-spacing:.08em;
  color:var(--gilt);
  max-width:none;
}
.footer-signoff{
  max-width:26em;
  font-size:.8125rem;
  line-height:1.7;
  color:var(--on-dark-soft);
}
.site-footer__nav{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:clamp(1.25rem,2.5vw,2rem);
}
.footer-col{display:flex;flex-direction:column}
.footer-heading{
  font-family:var(--font-num);
  font-size:.75rem;
  font-weight:500;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--gilt);
  margin-bottom:.95rem;
  line-height:1.4;
}
.footer-links{display:flex;flex-direction:column;gap:.5rem}
.footer-links a{
  display:inline-block;
  width:fit-content;
  font-size:.9375rem;
  color:var(--on-dark);
  text-decoration:none;
  transition:color 160ms var(--ease-out),transform 160ms var(--ease-out);
}
.footer-links a:hover{color:var(--gilt);transform:translateX(3px)}

.site-footer__contact{display:flex;flex-direction:column}
.footer-contact__list{display:flex;flex-direction:column;gap:1rem}
.footer-contact__item{display:flex;flex-direction:column;gap:.3rem}
.footer-contact__label{
  font-family:var(--font-num);
  font-size:.6875rem;
  letter-spacing:.14em;
  color:var(--on-dark-soft);
}
.footer-contact__value{
  font-size:.9375rem;
  line-height:1.7;
  color:var(--on-dark);
}
.copy-btn{
  display:inline-flex;
  align-items:center;
  gap:.6rem;
  width:fit-content;
  padding:.35rem .7rem;
  border:1px solid rgba(255,255,255,.18);
  border-radius:var(--radius-s);
  color:var(--snow);
  font-size:.875rem;
  letter-spacing:.03em;
  transition:border-color 160ms var(--ease-out),background-color 160ms var(--ease-out);
}
.copy-btn:hover{border-color:var(--gilt);background:var(--gilt-wash)}
.copy-btn__value{font-size:.8438rem}
.copy-btn__hint{
  font-family:var(--font-text);
  font-size:.75rem;
  letter-spacing:.08em;
  color:var(--on-dark-soft);
}
.copy-btn[data-copy-state="ok"]{border-color:var(--gilt)}
.copy-btn[data-copy-state="ok"] .copy-btn__hint{color:var(--gilt)}
.copy-btn[data-copy-state="fail"]{border-color:rgba(166,90,46,.6)}
.copy-btn[data-copy-state="fail"] .copy-btn__hint{color:var(--amber)}
.footer-contact__note{
  margin-top:1.1rem;
  max-width:28em;
  font-size:.8125rem;
  line-height:1.7;
  color:var(--on-dark-soft);
}

.site-footer__baseline{border-top:1px solid rgba(255,255,255,.12)}
.site-footer__baseline-inner{
  width:100%;
  max-width:var(--shell-wide);
  margin-inline:auto;
  padding:1.1rem var(--gutter) 1.45rem;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:.6rem 1.5rem;
}
.footer-copy,.footer-legal{
  max-width:none;
  font-family:var(--font-num);
  font-size:.75rem;
  letter-spacing:.08em;
  color:var(--on-dark-soft);
}

/* ---------- 6. 布局容器 ---------- */
.shell{
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding-inline:var(--gutter);
}
.shell--narrow{max-width:var(--shell-narrow)}
.shell--wide{max-width:var(--shell-wide)}

.section{padding-block:clamp(3.25rem,8vw,7rem)}
.section--tight{padding-block:clamp(2rem,4vw,3.5rem)}
.section--dark{
  background:var(--ink);
  color:var(--on-dark);
  border-top:1px solid var(--gilt-line);
  border-bottom:1px solid var(--gilt-line);
}
.section--dark h1,
.section--dark h2,
.section--dark h3,
.section--dark h4{color:var(--snow)}

.band{
  background:var(--wine);
  color:var(--snow);
  border-top:1px solid var(--gilt-line);
  border-bottom:1px solid var(--gilt-line);
}
.band--cellar{background:var(--cellar)}
.band--archive{background:var(--archive)}
.band h1,.band h2,.band h3,.band h4{color:var(--snow)}

.section__head{
  display:grid;
  grid-template-columns:minmax(0,1fr) auto;
  align-items:end;
  gap:1rem 2.5rem;
  padding-bottom:1rem;
  margin-bottom:clamp(1.5rem,3vw,2.5rem);
  border-bottom:1px solid var(--hairline);
}
.section--dark .section__head,
.band .section__head{border-bottom-color:rgba(199,164,94,.4)}

.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:.6rem;
  font-family:var(--font-num);
  font-size:.75rem;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--wine);
}
.eyebrow::before{
  content:"";
  width:18px;height:1px;
  background:currentColor;
  opacity:.8;
}
.section--dark .eyebrow,
.band .eyebrow{color:var(--gilt)}

.lede{
  font-size:clamp(1.0625rem,1.5vw,1.25rem);
  line-height:1.8;
  color:var(--ink-70);
  max-width:var(--measure);
}
.section--dark .lede,
.band .lede{color:rgba(255,255,255,.78)}

.prose{max-width:var(--measure)}
.prose p{max-width:var(--measure)}
.prose p + p{margin-top:1.05em}
.prose h2{margin-top:2.2em;margin-bottom:.7em}
.prose h3{margin-top:1.8em;margin-bottom:.5em}
.prose ul,
.prose ol{margin-top:.9em;max-width:var(--measure)}
.prose li{position:relative;padding-left:1.3em;margin-bottom:.5em}
.prose li::before{
  content:"";
  position:absolute;
  left:0;top:.72em;
  width:6px;height:1px;
  background:var(--gilt);
}
.prose a{color:var(--wine);text-decoration:underline}
.prose a:hover{color:var(--ember)}
.prose strong{font-weight:600;color:var(--ink)}
.section--dark .prose a,.band .prose a{color:var(--gilt)}
.section--dark .prose strong,.band .prose strong{color:var(--snow)}

.rule{height:1px;border:0;background:var(--hairline)}
.rule--gilt{background:var(--gilt-line)}

.callout{
  padding:clamp(1.15rem,2.6vw,1.85rem);
  border-left:3px solid var(--gilt);
  border-radius:0 var(--radius-m) var(--radius-m) 0;
  background:var(--gilt-wash);
}
.callout p{max-width:var(--measure)}
.section--dark .callout,
.band .callout{background:rgba(255,255,255,.07);border-left-color:var(--gilt)}

.stack{display:flex;flex-direction:column;gap:clamp(1rem,2.4vw,1.75rem)}
.stack--tight{gap:.75rem}
.stack--loose{gap:clamp(2rem,5vw,3.5rem)}

.grid{display:grid;gap:clamp(1rem,2.5vw,2rem)}
.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--rail{grid-template-columns:repeat(12,minmax(0,1fr))}

.offset-top{padding-top:calc(var(--header-h) + var(--masthead-h) + clamp(1.75rem,5vw,4rem))}

/* ---------- 7. 通用组件 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:.5rem;
  padding:.85rem 1.6rem;
  border:1px solid var(--ink);
  border-radius:var(--radius-s);
  background:transparent;
  color:var(--ink);
  font-family:var(--font-text);
  font-size:.9375rem;
  font-weight:500;
  letter-spacing:.06em;
  text-decoration:none;
  transition:background-color 180ms var(--ease-out),color 180ms var(--ease-out),border-color 180ms var(--ease-out),transform 180ms var(--ease-out);
}
.btn:hover{background:var(--ink);color:var(--snow);transform:translateY(-2px)}
.btn--solid{background:var(--wine);border-color:var(--wine);color:var(--snow)}
.btn--solid:hover{background:var(--ember);border-color:var(--ember);color:var(--snow)}
.btn--gilt{border-color:var(--gilt-line);color:var(--gilt)}
.btn--gilt:hover{background:var(--gilt);border-color:var(--gilt);color:var(--ink)}
.btn--quiet{
  padding:.5rem 0;
  border:0;
  border-bottom:1px solid currentColor;
  border-radius:0;
  color:var(--wine);
}
.btn--quiet:hover{background:transparent;color:var(--ember);transform:translateY(-2px)}
.section--dark .btn--quiet,
.band .btn--quiet{color:var(--gilt)}

.breadcrumb{
  font-family:var(--font-num);
  font-size:.75rem;
  letter-spacing:.08em;
  color:var(--mist);
}
.breadcrumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:.5rem}
.breadcrumb li{display:inline-flex;align-items:center;gap:.5rem}
.breadcrumb li + li::before{content:"/";color:var(--mist);opacity:.7}
.breadcrumb a{
  text-decoration:none;
  border-bottom:1px solid transparent;
  transition:border-color var(--dur) var(--ease-out),color var(--dur) var(--ease-out);
}
.breadcrumb a:hover{color:var(--wine);border-bottom-color:currentColor}
.breadcrumb [aria-current="page"]{color:var(--ink);font-weight:500}
.section--dark .breadcrumb,
.band .breadcrumb{color:rgba(255,255,255,.6)}
.section--dark .breadcrumb [aria-current="page"],
.band .breadcrumb [aria-current="page"]{color:var(--gilt)}

.matrix{
  width:100%;
  background:var(--snow);
  border:1px solid var(--hairline);
  font-size:.9375rem;
}
.matrix caption{
  caption-side:bottom;
  padding-top:.75rem;
  font-size:.8125rem;
  line-height:1.6;
  color:var(--mist);
  text-align:left;
}
.matrix th,
.matrix td{
  padding:.85rem 1rem;
  text-align:left;
  vertical-align:top;
  border-bottom:1px solid var(--hairline);
}
.matrix thead th{
  background:var(--cellar);
  color:var(--snow);
  font-family:var(--font-num);
  font-size:.8125rem;
  font-weight:500;
  letter-spacing:.08em;
}
.matrix tbody tr:nth-child(even){background:var(--archive-wash)}
.matrix tbody tr:hover{background:var(--gilt-wash)}
.matrix tbody tr:last-child td{border-bottom:0}
.matrix td.num,
.matrix th.num{font-family:var(--font-num);letter-spacing:.04em}
.matrix--compact th,
.matrix--compact td{padding:.6rem .75rem;font-size:.875rem}

.tag{
  display:inline-flex;
  align-items:center;
  gap:.35rem;
  padding:.2rem .6rem;
  border:1px solid var(--hairline);
  border-radius:999px;
  font-family:var(--font-num);
  font-size:.75rem;
  letter-spacing:.06em;
  color:var(--ink-70);
}
.tag--amber{border-color:rgba(166,90,46,.5);color:var(--amber)}
.tag--archive{border-color:rgba(46,75,69,.5);color:var(--archive)}
.tag--gilt{border-color:var(--gilt-line);color:var(--gilt)}

.stat{display:flex;flex-direction:column;gap:.3rem}
.stat__value{
  font-family:var(--font-num);
  font-weight:500;
  font-size:clamp(1.6rem,3.4vw,2.6rem);
  line-height:1.1;
  letter-spacing:.04em;
  color:var(--wine);
}
.stat__label{font-size:.8125rem;line-height:1.6;color:var(--mist)}
.section--dark .stat__value,
.band .stat__value{color:var(--gilt)}
.section--dark .stat__label,
.band .stat__label{color:rgba(255,255,255,.6)}

.toc{
  position:sticky;
  top:calc(var(--header-h) + var(--masthead-h) + 2rem);
  align-self:start;
}
.toc__title{
  font-family:var(--font-num);
  font-size:.75rem;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--mist);
  margin-bottom:.9rem;
}
.toc__list{
  display:flex;
  flex-direction:column;
  border-left:1px solid var(--hairline);
}
.toc__link{
  display:block;
  padding:.45rem 0 .45rem 1rem;
  margin-left:-1px;
  border-left:2px solid transparent;
  font-size:.875rem;
  line-height:1.5;
  text-decoration:none;
  color:var(--ink-70);
  transition:color 160ms var(--ease-out),border-color 160ms var(--ease-out),transform 160ms var(--ease-out);
}
.toc__link:hover{color:var(--wine);transform:translateX(2px)}
.toc__link[aria-current]{
  color:var(--wine);
  border-left-color:var(--wine);
  font-weight:600;
}

.faq{border-top:1px solid var(--hairline)}
.faq__item{border-bottom:1px solid var(--hairline)}
.faq__q{
  display:flex;
  align-items:flex-start;
  justify-content:space-between;
  gap:1.25rem;
  padding:1.15rem 0;
  cursor:pointer;
  font-family:var(--font-display);
  font-size:1.0625rem;
  font-weight:600;
  line-height:1.5;
  color:var(--ink);
  transition:color 160ms var(--ease-out);
}
.faq__q:hover{color:var(--wine)}
.faq__q::after{
  content:"+";
  flex-shrink:0;
  font-family:var(--font-num);
  font-size:1.125rem;
  color:var(--gilt);
  line-height:1.4;
}
.faq__item[open] .faq__q::after{content:"−"}
.faq__a{
  padding:0 0 1.35rem;
  max-width:var(--measure);
  color:var(--ink-70);
}
.faq__a p{max-width:var(--measure)}

.media{display:flex;flex-direction:column;gap:.75rem}
.media__frame{
  position:relative;
  overflow:hidden;
  aspect-ratio:16 / 10;
  border:1px solid var(--gilt-line);
  border-radius:var(--radius-m);
  background:linear-gradient(148deg,var(--ember) 0%,var(--wine) 46%,var(--cellar) 100%);
}
.media__frame > img,
.media__frame > picture,
.media__frame > picture > img,
.media__frame > video{
  position:absolute;
  inset:0;
  width:100%;
  height:100%;
  object-fit:cover;
}
.media__frame::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(180deg,rgba(36,27,26,0) 45%,rgba(36,27,26,.34) 100%);
  pointer-events:none;
}
.media__caption{
  font-size:.8125rem;
  line-height:1.6;
  color:var(--mist);
}
.media--wide .media__frame{aspect-ratio:21 / 9}
.media--tall .media__frame{aspect-ratio:3 / 4}
.media--square .media__frame{aspect-ratio:1 / 1}

/* ---------- 8. 显现 ---------- */
html.js [data-reveal]{
  opacity:0;
  transform:translateY(16px);
  transition:opacity 460ms var(--ease-out),transform 460ms var(--ease-out);
}
html.js [data-reveal][data-revealed]{
  opacity:1;
  transform:translateY(0);
}

/* ---------- 9. 响应式 ---------- */
@media (max-width:1100px){
  .site-footer__inner{grid-template-columns:minmax(0,1fr) minmax(0,1.4fr)}
  .site-footer__contact{grid-column:1 / -1}
}
@media (max-width:1024px){
  .grid--4{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:960px){
  .masthead{display:none}
  .nav-toggle{display:inline-flex}
  .site-nav{
    position:absolute;
    left:0;right:0;
    top:100%;
    display:none;
    max-height:calc(100vh - var(--header-h));
    overflow-y:auto;
    padding:.35rem var(--gutter) 1.25rem;
    background:var(--ink);
    border-top:1px solid var(--gilt-line);
    border-bottom:1px solid var(--gilt-line);
  }
  .site-nav[data-open]{display:block}
  .site-nav__list{
    flex-direction:column;
    align-items:stretch;
    gap:0;
  }
  .site-nav__list li + li{border-top:1px solid rgba(255,255,255,.09)}
  .site-nav__link{
    display:block;
    padding:.95rem 0;
    color:rgba(255,255,255,.86);
    font-size:1rem;
  }
  .site-nav__link::after{display:none}
  .site-nav__link:hover{transform:none;color:var(--gilt)}
  .site-nav__link[aria-current="page"],
  .site-header[data-scrolled] .site-nav__link[aria-current="page"],
  body[data-hero="dark"] .site-header:not([data-scrolled]) .site-nav__link[aria-current="page"]{
    color:var(--gilt);
    font-weight:600;
  }
  .offset-top{padding-top:calc(var(--header-h) + clamp(1.25rem,5vw,2.5rem))}
  .toc{position:static;top:auto}
}
@media (max-width:900px){
  .grid--3{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:760px){
  .site-footer__inner{grid-template-columns:minmax(0,1fr)}
  .site-footer__nav{grid-template-columns:repeat(2,minmax(0,1fr))}
  .section__head{grid-template-columns:minmax(0,1fr)}
  .grid--rail{grid-template-columns:repeat(6,minmax(0,1fr))}
}
@media (max-width:620px){
  .grid--2,
  .grid--3,
  .grid--4{grid-template-columns:minmax(0,1fr)}
  .site-footer__nav{grid-template-columns:minmax(0,1fr)}
  .brand__sub{display:none}
  .matrix{font-size:.875rem}
  .matrix th,
  .matrix td{padding:.65rem .7rem}
}

/* ---------- 10. 动效降级 ---------- */
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms!important;
    animation-iteration-count:1!important;
    transition-duration:.001ms!important;
  }
  html.js [data-reveal]{
    opacity:1;
    transform:none;
  }
  .btn:hover,
  .nav-toggle:hover,
  .footer-links a:hover,
  .toc__link:hover,
  .site-nav__link:hover{transform:none}
}