:root {
  --berry: #b4235a;
  --berry-deep: #8f1c48;
  --rose: #f8e7ef;
  --ink: #2a1520;
  --muted: #7a5364;
  --line: #efcfe0;
  --soft: #fff7fa;
  --paper: #ffffff;
  --rail-w: 220px;
  --max: 1120px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(700px 320px at 100% 0%, #fde8f1 0%, transparent 60%),
    linear-gradient(180deg, #fff9fb 0%, #fff 45%, #fff7fa 100%);
  line-height: 1.75;
}
a { color: var(--berry-deep); text-decoration: none; }
a:hover { text-decoration: underline; }
.wrap { max-width: var(--max); margin: 0 auto; padding: 0 1.1rem; }

.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255, 249, 251, 0.94);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(8px);
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  gap: 1rem; min-height: 62px;
}
.brand {
  display: inline-flex; align-items: center; gap: .55rem;
  font-weight: 700; color: var(--ink); text-decoration: none;
}
.brand img { border-radius: 10px; }
.nav-desktop { display: flex; gap: 1rem; flex-wrap: wrap; }
.nav-desktop a { color: var(--ink); font-size: .94rem; }
.menu-toggle {
  display: none; border: 1px solid var(--line); background: #fff;
  border-radius: 10px; padding: .4rem .7rem; cursor: pointer; color: var(--ink);
}
#mobile-nav {
  display: none; flex-direction: column; gap: .3rem;
  padding: .45rem 1.1rem 1rem; border-top: 1px solid var(--line); background: var(--soft);
}
#mobile-nav.open { display: flex; }

.rail-layout {
  display: grid;
  grid-template-columns: var(--rail-w) minmax(0, 1fr);
  gap: 1.4rem;
  padding: 1.2rem 0 2rem;
  align-items: start;
}
.rail-nav {
  position: sticky; top: 78px;
  background: var(--soft);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: .9rem .85rem;
}
.rail-nav h2 {
  margin: 0 0 .55rem; font-size: .95rem; color: var(--berry-deep);
}
.rail-nav ul { list-style: none; margin: 0; padding: 0; }
.rail-nav li { margin: 0 0 .25rem; }
.rail-nav a {
  display: block; padding: .4rem .55rem; border-radius: 10px;
  color: var(--ink); font-size: .92rem;
}
.rail-nav a:hover { background: #fff; text-decoration: none; color: var(--berry); }

.rail-main h1 {
  margin: 0 0 .7rem; font-size: clamp(1.45rem, 2.8vw, 2rem); line-height: 1.3;
}
.rail-lead {
  margin: 0 0 1rem; color: var(--muted); font-size: 1.02rem;
}
.rail-block {
  margin: 0 0 1.35rem; padding-top: .2rem;
}
.rail-block h2 {
  margin: 0 0 .65rem; font-size: 1.28rem;
  padding-bottom: .35rem; border-bottom: 2px solid var(--rose);
}
.rail-block p { margin: 0 0 1rem; }
.rail-hero-img {
  border-radius: 16px; overflow: hidden; border: 1px solid var(--line);
  margin: 0 0 1rem; background: #fff;
}
.rail-hero-img img { width: 100%; display: block; }
.rail-figure {
  margin: 1rem 0; border-radius: 14px; overflow: hidden;
  border: 1px solid var(--line); background: #fff;
}
.rail-figure img { width: 100%; display: block; }
.rail-figure figcaption {
  padding: .5rem .8rem; font-size: .88rem; color: var(--muted); background: var(--rose);
}
.rail-pair {
  display: grid; grid-template-columns: 1fr 1fr; gap: .85rem; margin: 1rem 0;
}
.rail-callout {
  background: var(--rose); border-left: 4px solid var(--berry);
  border-radius: 0 12px 12px 0; padding: .85rem 1rem; margin: 1rem 0;
}
.rail-peers {
  display: flex; flex-wrap: wrap; gap: .55rem; margin: .8rem 0 1rem;
}
.rail-peers a {
  background: #fff; border: 1px solid var(--line); border-radius: 999px;
  padding: .4rem .8rem; color: var(--berry-deep);
}
.faq-list details {
  background: #fff; border: 1px solid var(--line); border-radius: 12px;
  padding: .65rem .85rem; margin: 0 0 .5rem;
}
.faq-list summary { cursor: pointer; font-weight: 600; }
.site-footer {
  border-top: 1px solid var(--line); background: var(--soft);
  padding: 1.3rem 0 2rem; color: var(--muted); font-size: .92rem;
}
.page-hero { padding: 1.25rem 0 .5rem; }
.page-hero h1 { margin: 0 0 .35rem; font-size: 1.5rem; }
.prose p { margin: 0 0 1rem; }
.err-box {
  text-align: center; padding: 2.2rem 1rem; margin: 1rem 0;
  background: #fff; border: 1px solid var(--line); border-radius: 16px;
}
.btn {
  display: inline-block; padding: .5rem 1rem; border-radius: 999px;
  background: var(--berry); color: #fff; text-decoration: none; font-weight: 600;
}
.muted { color: var(--muted); }

@media (max-width: 920px) {
  .nav-desktop { display: none; }
  .menu-toggle { display: inline-block; }
  .rail-layout { grid-template-columns: 1fr; }
  .rail-nav { position: static; }
  .rail-pair { grid-template-columns: 1fr; }
}


/* SEO keyword highlight */
strong.kw,.kw{
  color:var(--accent,var(--brand,#e86a2c));
  font-weight:800;
}
mark.kw{
  background:color-mix(in srgb, var(--brand,#e86a2c) 16%, transparent);
  color:inherit;
  padding:0 .12em;
  border-radius:3px;
}
h1 .kw,h2 .kw,h3 .kw{color:var(--brand,#e86a2c)}

/* UNIQUE_HAMBURGER_THEME_START */

/* === unique chrome: hamburger-only + theme === */
:root{--bg:#fff5f8;--paper:#ffffff;--ink:#3b1024;--muted:#8f5a72;--line:#f3d0de;--soft:#fff0f5;--brand:#db2777;--brand2:#f472b6;--accent:#9d174d;--header-bg:rgba(255,255,255,.9);--radius:999px;--shadow:0 10px 24px rgba(219,39,119,.12);--font:"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;}
body{font-family:var(--font)}
.site-header{
  position:sticky;top:0;z-index:50;
  background:var(--header-bg, var(--paper));
  color:var(--ink);
  border-bottom:1px solid var(--line);
}
.site-header .brand{color:var(--ink)}
.site-header .brand span{color:var(--ink)}
.nav-desktop{display:none!important}
.menu-toggle{display:inline-flex;align-items:center;justify-content:center;
  width:44px;height:44px;padding:0;cursor:pointer;
  border:1px solid var(--line);background:transparent;color:inherit;
  border-radius:var(--radius);
}
.menu-toggle .burger{
  width:20px;height:14px;display:flex;flex-direction:column;justify-content:space-between;
}
.menu-toggle .burger i{
  display:block;height:2px;width:100%;background:currentColor;border-radius:2px;
  transition:transform .22s ease,opacity .22s ease;
}
.menu-toggle[aria-expanded="true"] .burger i:nth-child(1){transform:translateY(6px) rotate(45deg)}
.menu-toggle[aria-expanded="true"] .burger i:nth-child(2){opacity:0}
.menu-toggle[aria-expanded="true"] .burger i:nth-child(3){transform:translateY(-6px) rotate(-45deg)}
#mobile-nav{
  display:none;flex-direction:column;gap:.25rem;
  padding:.65rem 1rem 1rem;border-top:1px solid var(--line);
  background:var(--paper);color:var(--ink);
}
#mobile-nav.open{display:flex}
#mobile-nav a{
  padding:.7rem .55rem;border-radius:calc(var(--radius) / 2);
  color:var(--ink);font-weight:700;
}
#mobile-nav a:hover{background:color-mix(in srgb, var(--brand) 12%, transparent)}
.theme-berry-float .site-header{/* marker */}

.header-inner{padding:.85rem 1rem}.menu-toggle{border-radius:999px;background:var(--brand);color:#fff;border:0}.menu-toggle .burger i{background:#fff}
/* UNIQUE_HAMBURGER_THEME_END */

/* DESKTOP_ADAPT_START */


html{ -webkit-text-size-adjust:100%; }
img,video{ max-width:100%; height:auto; }
.header-inner,.wrap,.site-main,.footer-inner,.ads-head{
  width:100%;
  margin-left:auto;margin-right:auto;
  box-sizing:border-box;
}
.header-inner{
  max-width:var(--desk-max, var(--max, 1120px));
  padding:.85rem clamp(1rem, 3vw, 1.75rem);
  min-height:64px;
}
.site-main,.wrap,.footer-inner,.ads-head{
  max-width:var(--desk-max, var(--max, 1120px));
  padding-left:clamp(1rem, 3vw, 1.75rem);
  padding-right:clamp(1rem, 3vw, 1.75rem);
}
@media (min-width:1280px){
  :root{ --desk-max:1240px; }
  body{ font-size:17.5px; }
}
@media (min-width:1440px){
  :root{ --desk-max:1320px; }
}



@media (min-width:901px){
  .rail-layout{
    display:grid!important; grid-template-columns:220px minmax(0,1fr);
    gap:1.75rem; align-items:start;
  }
  .rail-nav{ position:sticky; top:84px; }
  .rail-main{ min-width:0; }
  .rail-pair{ display:grid; grid-template-columns:1fr 1fr; gap:1rem; }
}

/* DESKTOP_ADAPT_END */

/* DESKTOP_ADAPT_PATCH */
@media (max-width:900px){
  #mobile-nav.open{
    flex-direction:column!important;
    align-items:stretch!important;
    justify-content:flex-start!important;
  }
  .header-inner,.site-main,.wrap,.footer-inner,.ads-head{
    padding-left:1rem;
    padding-right:1rem;
  }
}
@media (min-width:901px){
  .ads-head .ads-wrap{ max-width:100%; }
  #ads{ justify-content:center; gap:16px 20px; }
  /* cinema full-bleed frames stay edge-to-edge */
  body[data-template="cinema"] .cine-frame{
    width:100vw;
    margin-left:calc(50% - 50vw);
    margin-right:calc(50% - 50vw);
  }
  body[data-template="dark-band"] .band-hero,
  body[data-template="dark-band"] .band-dark,
  body[data-template="dark-band"] .band-light{
    width:100%;
  }
}


/* UNIQUE_VISUAL_SKIN_START */
body{
  background:
    radial-gradient(800px 420px at 10% -10%, rgba(244,114,182,.22), transparent 55%),
    radial-gradient(700px 380px at 100% 0%, rgba(219,39,119,.12), transparent 50%),
    #fff5f9 !important;
}
.site-header{
  background:rgba(255,255,255,.75)!important;border:0!important;
  box-shadow:0 12px 30px rgba(219,39,119,.1)!important;border-radius:0 0 28px 28px!important;
}
.rail-layout{gap:1.5rem!important}
.rail-nav{
  background:linear-gradient(180deg,#fff,#ffe4f0)!important;border-radius:24px!important;
  padding:1rem!important;border:1px solid #f3d0de!important;
  box-shadow:0 14px 28px rgba(219,39,119,.08)!important;
}
.rail-nav a{border-radius:999px!important;padding:.45rem .7rem!important}
.rail-main .rail-block,.rail-callout{
  border-radius:24px!important;border:0!important;
  background:#fff!important;box-shadow:0 14px 30px rgba(59,16,36,.06)!important;
}
.btn{border-radius:999px!important}
.site-footer{background:#3b1024!important;color:#ffe4ef!important;border:0!important}
/* UNIQUE_VISUAL_SKIN_END */

/* UNIQUE_SKIN_V2_START */
@media (min-width:901px){.rail-layout{grid-template-columns:200px 1fr!important}}
.rail-lead{font-size:1.05rem}
/* UNIQUE_SKIN_V2_END */


/* DESKTOP_NAV_TOP_START */
.header-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:1rem;
  flex-wrap:nowrap;
}
#mobile-nav{
  display:none;
  flex-direction:column;
  gap:.25rem;
  width:100%;
  order:3;
  padding:.55rem 0 .85rem;
  border-top:1px solid var(--line, #e5e5e5);
  background:var(--paper, #fff);
}
#mobile-nav.open{display:flex}
.menu-toggle{display:inline-flex}

@media (min-width:901px){
  .menu-toggle{display:none!important}
  .header-inner{flex-wrap:nowrap;align-items:center}
  #mobile-nav,
  #mobile-nav.open{
    display:flex!important;
    flex-direction:row!important;
    flex-wrap:wrap;
    align-items:center;
    justify-content:flex-end;
    gap:.15rem .75rem;
    width:auto;
    max-width:none;
    order:0;
    margin-left:auto;
    margin-right:0;
    padding:0!important;
    border:0!important;
    background:transparent!important;
    box-shadow:none!important;
  }
  #mobile-nav a{
    padding:.35rem .45rem!important;
    white-space:nowrap;
    border-radius:0!important;
    background:transparent!important;
    color:inherit!important;
    font-weight:700;
  }
  #mobile-nav a:hover{
    color:var(--brand, var(--accent))!important;
    background:transparent!important;
    text-decoration:underline;
  }
}
@media (max-width:900px){
  .header-inner{flex-wrap:wrap}
  .menu-toggle{display:inline-flex!important;margin-left:auto}
  #mobile-nav{
    display:none;
    width:100%;
    order:3;
    flex-direction:column!important;
    align-items:stretch!important;
  }
  #mobile-nav.open{display:flex!important}
}
/* DESKTOP_NAV_TOP_END */