:root{
  --grape-deep:#3F1D5C;
  --grape:#6C2E9B;
  --grape-soft:#A678CF;
  --green:#7CC576;
  --green-soft:#C8EBB8;
  --green-deep:#2F6B4F;
  --frost:#F7F4FA;
  --amber:#D99A2B;
  --ink:#24152E;
  --ink-soft:#5C4A69;
  --line:#D8CCE4;
  --white:#FFFFFF;

  --radius-sm:12px;
  --radius-md:18px;
  --radius-lg:26px;
  --radius-pill:999px;

  --shadow-1:0 1px 0 rgba(63,29,92,.05),0 10px 26px -20px rgba(63,29,92,.6);
  --shadow-2:0 2px 0 rgba(63,29,92,.04),0 26px 48px -30px rgba(63,29,92,.7);

  --grad-grape:linear-gradient(140deg,#6C2E9B 0%,#3F1D5C 62%,#2A1140 100%);
  --grad-band:linear-gradient(90deg,#3F1D5C 0%,#6C2E9B 42%,#A678CF 74%,#C8EBB8 100%);
  --grad-fresh:linear-gradient(145deg,#EDE4F5 0%,#E4F2DD 100%);

  --container:1200px;
  --gutter:clamp(16px,4vw,40px);

  --sans:"PingFang SC","HarmonyOS Sans SC","Noto Sans SC","Source Han Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --mono:"JetBrains Mono","Roboto Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}

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

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

body{
  margin:0;
  min-height:100vh;
  font-family:var(--sans);
  font-size:16px;
  line-height:1.7;
  color:var(--ink);
  background-color:var(--frost);
  background-image:
    radial-gradient(900px 440px at 84% -10%,rgba(166,120,207,.20),transparent 62%),
    radial-gradient(760px 400px at -6% 2%,rgba(200,235,184,.30),transparent 60%);
  background-repeat:no-repeat;
  background-attachment:fixed;
  -webkit-font-smoothing:antialiased;
}

img,svg,video,canvas{display:block;max-width:100%}
button,input,select,textarea{font:inherit;color:inherit}
ul,ol{margin:0;padding:0;list-style:none}
p{margin:0 0 1em}
figure{margin:0}

h1,h2,h3,h4{margin:0 0 .55em;font-weight:800;letter-spacing:-.02em;line-height:1.14}
h1{font-size:clamp(40px,6vw,72px);line-height:1.04;letter-spacing:-.035em}
h2{font-size:clamp(28px,3.2vw,44px)}
h3{font-size:clamp(20px,2vw,26px);letter-spacing:-.01em}

a{color:var(--grape);text-decoration-thickness:1px;text-underline-offset:.16em}
a:hover{color:var(--grape-deep)}

::selection{background:var(--green-soft);color:var(--green-deep)}

:focus-visible{
  outline:3px solid var(--amber);
  outline-offset:3px;
}

/* ---------- shared layout ---------- */
.wrap{
  width:min(calc(100% - 2 * var(--gutter)),var(--container));
  margin-inline:auto;
}
.prose{max-width:76ch}
.prose p{font-size:clamp(16px,1.15vw,17.5px);color:var(--ink-soft)}
.section{padding-block:clamp(36px,6vw,88px)}
.rule-band{
  height:6px;border:0;margin:0 0 clamp(20px,3vw,36px);
  border-radius:var(--radius-pill);
  background:var(--grad-band);
}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  margin:0 0 12px;
  font-family:var(--mono);font-size:11.5px;font-weight:600;
  letter-spacing:.18em;text-transform:uppercase;color:var(--grape);
}
.eyebrow::before{
  content:"";width:22px;height:3px;border-radius:2px;background:var(--grad-band);
}
.num{font-family:var(--mono);font-variant-numeric:tabular-nums;letter-spacing:-.01em}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:10px 18px;
  border:1px solid transparent;border-radius:var(--radius-pill);
  font-family:inherit;font-size:13.5px;font-weight:700;line-height:1.2;
  text-decoration:none;cursor:pointer;
  transition:transform .18s ease,box-shadow .18s ease,background-color .18s ease,border-color .18s ease,color .18s ease;
}
.btn--primary{background:var(--grape-deep);color:var(--white);box-shadow:0 12px 24px -16px rgba(63,29,92,.95)}
.btn--primary:hover{background:var(--grape);color:var(--white);transform:translateY(-2px)}
.btn--amber{background:var(--amber);color:#2A1140;box-shadow:0 12px 24px -16px rgba(217,154,43,.95)}
.btn--amber:hover{background:#E7AC44;color:#2A1140;transform:translateY(-2px)}
.btn--green{background:var(--green);color:#16351F}
.btn--green:hover{background:#8FD289;color:#16351F;transform:translateY(-2px)}
.btn--ghost{background:transparent;border-color:var(--line);color:var(--ink)}
.btn--ghost:hover{border-color:var(--grape-soft);color:var(--grape-deep);transform:translateY(-2px)}

/* ---------- tags / cards / crumbs ---------- */
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 11px;border-radius:var(--radius-pill);
  font-size:11.5px;font-weight:700;letter-spacing:.08em;
  background:var(--green-soft);color:var(--green-deep);
  border:1px solid rgba(47,107,79,.18);
}
.tag--grape{background:rgba(166,120,207,.20);color:var(--grape-deep);border-color:rgba(108,46,155,.22)}
.tag--amber{background:rgba(217,154,43,.16);color:#8A5F0F;border-color:rgba(217,154,43,.32)}

.card{
  background:var(--white);
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  padding:clamp(18px,2vw,28px);
  box-shadow:var(--shadow-1);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.card:hover{transform:translateY(-3px);box-shadow:var(--shadow-2);border-color:var(--grape-soft)}

.crumb{font-size:12.5px;color:var(--ink-soft)}
.crumb__list{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.crumb__item{display:inline-flex;align-items:center;gap:8px}
.crumb__item + .crumb__item::before{
  content:"/";font-family:var(--mono);color:var(--grape-soft);
}
.crumb__link{color:inherit;text-decoration:none;border-bottom:1px solid transparent}
.crumb__link:hover{color:var(--grape);border-bottom-color:currentColor}
.crumb__current{color:var(--ink);font-weight:700}

/* ---------- grids ---------- */
.grid{display:grid;gap:clamp(16px,2.4vw,28px)}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid--split{grid-template-columns:minmax(0,5fr) minmax(0,7fr)}

/* ---------- media placeholders ---------- */
.media{
  position:relative;overflow:hidden;
  border-radius:var(--radius-lg);
  background:var(--grad-fresh);
  isolation:isolate;
}
.media > img,.media > svg{width:100%;height:100%;object-fit:cover;transition:transform .4s ease}
.media--wide{aspect-ratio:16/9}
.media--43{aspect-ratio:4/3}
.media--square{aspect-ratio:1/1}
.media--tall{aspect-ratio:3/4}
.media--slant{border-radius:var(--radius-lg) var(--radius-lg) var(--radius-lg) 72px}
.media:hover > img{transform:scale(1.03)}
.figure{display:grid;gap:10px;margin:0}
.figure__caption{font-size:13px;color:var(--ink-soft)}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(247,244,250,.92);
  -webkit-backdrop-filter:blur(14px) saturate(1.25);
  backdrop-filter:blur(14px) saturate(1.25);
  border-bottom:1px solid var(--line);
}
.site-header::after{
  content:"";position:absolute;left:0;right:0;bottom:-1px;height:2px;
  background:var(--grad-band);opacity:.5;pointer-events:none;
}
.scroll-meter{
  position:absolute;left:0;right:0;bottom:-2px;height:2px;z-index:2;
  transform:scaleX(0);transform-origin:0 50%;
  background:linear-gradient(90deg,var(--amber),var(--green));
  will-change:transform;
}
.skip-link{
  position:fixed;top:10px;left:10px;z-index:200;
  padding:10px 18px;border-radius:var(--radius-pill);
  background:var(--grape-deep);color:var(--white);
  font-size:14px;font-weight:700;text-decoration:none;
  transform:translateY(-220%);
  transition:transform .18s ease;
}
.skip-link:focus{transform:translateY(0);color:var(--white)}

.header-shell{
  position:relative;
  width:min(calc(100% - 2 * var(--gutter)),var(--container));
  margin-inline:auto;
  display:flex;align-items:center;
  gap:clamp(8px,1.4vw,20px);
  min-height:74px;padding-block:10px;
}

.brand{
  display:inline-flex;align-items:center;gap:10px;
  flex:0 0 auto;text-decoration:none;color:var(--ink);
}
.brand:hover{color:var(--grape-deep)}
.brand-mark{
  position:relative;display:block;
  width:40px;height:40px;border-radius:14px;
  background:var(--grad-grape);
  box-shadow:inset 0 0 0 1px rgba(255,255,255,.18),0 10px 20px -16px rgba(63,29,92,.95);
  overflow:hidden;
}
.brand-mark::before{
  content:"";position:absolute;left:8px;right:8px;bottom:8px;height:15px;
  border-radius:3px 3px 11px 11px;
  background:linear-gradient(180deg,var(--green-soft),var(--green));
}
.brand-mark::after{
  content:"";position:absolute;left:12px;top:9px;width:8px;height:8px;border-radius:50%;
  background:var(--green-soft);
  box-shadow:9px 2px 0 var(--grape-soft),5px 9px 0 var(--amber);
}
.brand-text{display:flex;flex-direction:column;line-height:1.06}
.brand-text__name{font-size:17px;font-weight:800;letter-spacing:-.02em}
.brand-text__tag{
  font-family:var(--mono);font-size:10px;font-weight:600;
  letter-spacing:.22em;color:var(--grape);
}

.site-nav{margin:0 auto}
.nav-list{display:flex;align-items:center;gap:4px}
.nav-link{
  display:inline-flex;align-items:center;gap:6px;
  padding:8px 11px;border-radius:var(--radius-pill);
  border:1px solid transparent;
  font-size:13px;font-weight:600;line-height:1.2;
  color:var(--ink);text-decoration:none;white-space:nowrap;
  transition:background-color .18s ease,border-color .18s ease,color .18s ease,box-shadow .18s ease;
}
.nav-link:hover{background:var(--white);border-color:var(--line);color:var(--grape-deep);box-shadow:var(--shadow-1)}
.nav-index{
  font-family:var(--mono);font-size:10px;font-weight:600;
  letter-spacing:.04em;color:var(--grape-soft);
}
.nav-link[aria-current="page"]{
  background:var(--grape-deep);color:var(--white);
  border-color:transparent;
  box-shadow:0 10px 20px -14px rgba(63,29,92,1);
}
.nav-link[aria-current="page"] .nav-index{color:var(--green-soft)}

.header-actions{display:flex;align-items:center;gap:8px;flex:0 0 auto}
.rank-switch{
  display:inline-flex;align-items:center;gap:6px;
  padding:7px 13px;border-radius:var(--radius-pill);
  border:1px dashed var(--grape-soft);
  background:rgba(255,255,255,.72);
  color:var(--grape-deep);text-decoration:none;
  font-size:12px;font-weight:700;line-height:1.2;
  transition:background-color .18s ease,border-color .18s ease;
}
.rank-switch:hover{background:var(--white);border-color:var(--grape);color:var(--grape-deep)}
.rank-switch__k{letter-spacing:.06em}
.rank-switch__v{font-family:var(--mono);color:var(--grape);letter-spacing:.04em}

.nav-toggle{
  display:none;align-items:center;gap:9px;
  padding:9px 14px;border-radius:var(--radius-pill);
  border:1px solid var(--line);background:var(--white);
  color:var(--grape-deep);font-size:13px;font-weight:700;
  cursor:pointer;
}
.nav-toggle:hover{border-color:var(--grape-soft)}
.nav-toggle__bars{
  position:relative;display:block;width:16px;height:2px;border-radius:2px;
  background:var(--grape-deep);
  transition:background-color .18s ease;
}
.nav-toggle__bars::before,.nav-toggle__bars::after{
  content:"";position:absolute;left:0;width:16px;height:2px;border-radius:2px;
  background:var(--grape-deep);
  transition:transform .18s ease,top .18s ease,background-color .18s ease;
}
.nav-toggle__bars::before{top:-5px}
.nav-toggle__bars::after{top:5px}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars{background:transparent}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before{top:0;transform:rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after{top:0;transform:rotate(-45deg)}
.nav-toggle__label{line-height:1}

/* ---------- footer ---------- */
.site-footer{
  margin-top:clamp(48px,7vw,96px);
  color:var(--ink);
  border-top:1px solid var(--line);
  background:
    radial-gradient(120% 130% at 6% 0%,rgba(200,235,184,.48),transparent 56%),
    radial-gradient(110% 120% at 96% 8%,rgba(166,120,207,.28),transparent 58%),
    linear-gradient(168deg,#EFE7F6 0%,#F7F4FA 46%,#F1ECF7 100%);
}
.footer-shell{
  width:min(calc(100% - 2 * var(--gutter)),var(--container));
  margin-inline:auto;
  padding-block:clamp(36px,5vw,64px) 28px;
  display:grid;gap:clamp(22px,3.2vw,40px);
}
.footer-top{
  display:flex;flex-wrap:wrap;align-items:flex-end;
  justify-content:space-between;gap:18px 28px;
}
.footer-brand{max-width:46ch}
.footer-brand__mark{
  position:relative;display:block;
  width:34px;height:34px;margin-bottom:12px;border-radius:12px;
  background:var(--grad-grape);
  box-shadow:0 10px 20px -16px rgba(63,29,92,.95);
}
.footer-brand__mark::after{
  content:"";position:absolute;left:7px;right:7px;bottom:7px;height:12px;
  border-radius:3px 3px 9px 9px;
  background:linear-gradient(180deg,var(--green-soft),var(--green));
}
.footer-brand__name{margin:0;font-size:20px;font-weight:800;letter-spacing:-.02em}
.footer-brand__line{margin:6px 0 0;font-size:14.5px;color:var(--ink-soft)}
.footer-help{
  display:inline-flex;align-items:center;gap:8px;
  padding:11px 20px;border-radius:var(--radius-pill);
  background:var(--green-soft);color:var(--green-deep);
  border:1px solid rgba(47,107,79,.20);
  font-size:14px;font-weight:700;text-decoration:none;
  transition:transform .2s ease,background-color .2s ease,box-shadow .2s ease;
}
.footer-help:hover{
  background:#D8F0CB;color:var(--green-deep);
  transform:translateY(-2px);
  box-shadow:0 16px 28px -22px rgba(47,107,79,1);
}
.footer-mid{
  display:grid;
  grid-template-columns:minmax(0,1.5fr) minmax(0,1fr);
  gap:clamp(20px,4vw,56px);
  padding-block:clamp(20px,3vw,30px);
  border-top:1px solid rgba(63,29,92,.12);
  border-bottom:1px solid rgba(63,29,92,.12);
}
.footer-nav__title{
  margin:0 0 12px;
  font-family:var(--mono);font-size:10.5px;font-weight:600;
  letter-spacing:.2em;text-transform:uppercase;color:var(--grape);
}
.footer-nav__list{display:flex;flex-wrap:wrap;gap:8px 24px}
.footer-nav--legal .footer-nav__list{flex-direction:column;gap:8px}
.footer-link{
  font-size:14.5px;font-weight:600;color:var(--ink);text-decoration:none;
  border-bottom:1px solid transparent;padding-bottom:1px;
  transition:color .16s ease,border-color .16s ease;
}
.footer-link:hover{color:var(--grape-deep);border-bottom-color:var(--grape-soft)}
.footer-bottom{
  display:grid;
  grid-template-columns:minmax(0,2.2fr) minmax(0,1fr);
  gap:20px 32px;align-items:start;
}
.footer-contact{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:12px 24px}
.footer-contact__label{
  display:block;margin-bottom:2px;
  font-family:var(--mono);font-size:10.5px;letter-spacing:.14em;
  text-transform:uppercase;color:var(--grape-soft);
}
.footer-contact__value{font-size:14px;color:var(--ink);word-break:break-word}
.footer-meta{font-size:12.5px;color:var(--ink-soft);text-align:right}
.footer-meta__line{margin:0 0 4px;font-family:var(--mono);letter-spacing:.01em}

/* ---------- responsive ---------- */
@media (min-width:1141px){
  .header-shell{transition:min-height .22s ease}
  .site-header.is-condensed .header-shell{min-height:62px}
}

@media (max-width:1140px){
  .header-shell{flex-wrap:nowrap}
  .brand{margin-right:auto}
  .nav-toggle{display:inline-flex}
  .site-nav{
    display:none;
    position:absolute;left:0;right:0;top:100%;
    margin:0;
    padding:14px var(--gutter) 20px;
    background:var(--white);
    border-bottom:1px solid var(--line);
    border-radius:0 0 var(--radius-lg) var(--radius-lg);
    box-shadow:var(--shadow-2);
  }
  .site-nav[data-open]{display:block}
  .nav-list{flex-direction:column;align-items:stretch;gap:6px}
  .nav-link{
    justify-content:flex-start;
    padding:12px 14px;border-radius:14px;
    border-color:var(--line);background:var(--frost);
    font-size:15px;
  }
  .nav-link[aria-current="page"]{background:var(--grape-deep);border-color:transparent}
  .grid--split{grid-template-columns:minmax(0,1fr)}
}

@media (max-width:900px){
  .grid--3{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-mid{grid-template-columns:minmax(0,1fr);gap:24px}
  .footer-nav--legal .footer-nav__list{flex-direction:row;gap:8px 24px}
  .footer-bottom{grid-template-columns:minmax(0,1fr)}
  .footer-meta{text-align:left}
}

@media (max-width:680px){
  .grid--2,.grid--3{grid-template-columns:minmax(0,1fr)}
  .brand-text__tag{display:none}
  .nav-toggle__label{display:none}
  .nav-toggle{padding:10px 12px}
  .header-shell{min-height:66px}
  .footer-top{align-items:flex-start;flex-direction:column}
  .footer-help{width:100%;justify-content:center}
}

@media (max-width:520px){
  .rank-switch{display:none}
  .brand-text__name{font-size:15.5px}
  .media--slant{border-radius:var(--radius-lg)}
}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.01ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.01ms !important;
    scroll-behavior:auto !important;
  }
  .card:hover,.btn:hover,.footer-help:hover{transform:none}
  .media:hover > img{transform:none}
}