@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:ital,wght@0,400;0,500;0,700;1,400&display=swap');
*, *::before, *::after { box-sizing: border-box; }

:root {
  --ink: #1c1726;
  --ink-soft: #3b3153;
  --grape: #6514ff;
  --magenta: #bf00ff;
  --paper: #f4f0ff;
  --milk: #ffffff;
  --tint: #e6daff;
  --veil: rgba(28, 23, 38, 0.08);
  --r: 28px;
  --r-s: 14px;
  --edge: clamp(14px, 4vw, 46px);
  --f: "Plus Jakarta Sans", system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

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

body {
  margin: 0;
  font-family: var(--f);
  font-size: 17px;
  line-height: 1.8;
  color: var(--ink);
  background-color: var(--paper);
  background-image: radial-gradient(circle at 1px 1px, rgba(101, 20, 255, 0.16) 1px, transparent 0);
  background-size: 24px 24px;
  overflow-x: hidden;
}

img { max-width: 100%; height: auto; display: block; }
p { margin: 0 0 1.05em; }
a { color: var(--grape); }
h1, h2, h3 { line-height: 1.22; letter-spacing: -0.015em; }

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

/* ---------- 顶部两行：品牌行 + 菜单行 ---------- */
.mast {
  position: sticky;
  top: 0;
  z-index: 70;
  background: rgba(244, 240, 255, 0.95);
  backdrop-filter: blur(12px);
  box-shadow: 0 2px 0 rgba(28, 23, 38, 0.09);
}

.brandline {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  flex-wrap: wrap;
  padding: 12px var(--edge) 10px;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-height: 46px;
  padding: 6px 16px 6px 10px;
  border-radius: 999px;
  background: var(--ink);
  color: #fff;
  text-decoration: none;
  font-weight: 700;
  letter-spacing: 0.01em;
  transition: background 220ms ease, transform 220ms ease;
}
.brand-mark:hover { background: var(--grape); transform: translateX(2px); }
.brand-mark img { width: 32px; height: 32px; border-radius: 50%; }
.mark-dot {
  width: 22px; height: 22px;
  border-radius: 7px;
  background: linear-gradient(135deg, var(--magenta), #ffd0ff);
  transform: rotate(12deg);
}
.brand-word { font-size: 17px; }

.findbox {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 1 1 220px;
  max-width: 340px;
  justify-content: flex-end;
}
.findbox input {
  flex: 1 1 auto;
  min-width: 0;
  min-height: 44px;
  padding: 10px 16px;
  font: inherit;
  font-size: 16px;
  color: var(--ink);
  background: var(--milk);
  border: 2px solid transparent;
  border-radius: 999px;
  box-shadow: 0 2px 0 var(--veil);
  transition: border-color 200ms ease;
}
.findbox input:focus { outline: none; border-color: var(--grape); }
.findbox button {
  min-height: 44px;
  padding: 10px 18px;
  font: inherit;
  font-size: 16px;
  font-weight: 700;
  color: #fff;
  background: var(--grape);
  border: 0;
  border-radius: 999px;
  cursor: pointer;
  transition: background 200ms ease, transform 200ms ease;
}
.findbox button:hover { background: var(--magenta); transform: translateY(-1px); }

.sheet {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 0 var(--edge) 12px;
}

.sheet > summary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 44px;
  padding: 9px 18px;
  font-size: 16px;
  font-weight: 700;
  color: #fff;
  background: var(--ink);
  border-radius: 999px;
  cursor: pointer;
  list-style: none;
  transition: background 200ms ease;
}
.sheet > summary::-webkit-details-marker { display: none; }
.sheet > summary::before {
  content: "";
  width: 16px; height: 12px;
  background: linear-gradient(#fff 0 2px, transparent 2px 5px, #fff 5px 7px, transparent 7px 10px, #fff 10px 12px);
}
.sheet > summary:hover { background: var(--grape); }
.s-close { display: none; }
.sheet[open] .s-open { display: none; }
.sheet[open] .s-close { display: inline; }

.sheet-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.sheet-list a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 9px 15px;
  font-size: 16px;
  font-weight: 500;
  color: var(--ink);
  background: var(--milk);
  border-radius: 999px;
  text-decoration: none;
  transition: background 200ms ease, color 200ms ease, transform 200ms ease;
}
.sheet-list a:hover { background: var(--grape); color: #fff; transform: translateY(-2px); }

.sheet[open] {
  position: fixed;
  inset: 0;
  z-index: 95;
  display: flex;
  flex-direction: column;
  gap: 18px;
  padding: 18px var(--edge) 40px;
  overflow: auto;
  background-color: var(--ink);
  background-image: radial-gradient(circle at 1px 1px, rgba(191, 0, 255, 0.4) 1px, transparent 0);
  background-size: 20px 20px;
  animation: pop 240ms ease both;
}
@keyframes pop {
  from { opacity: 0; transform: translateY(-10px); }
  to { opacity: 1; transform: none; }
}
.sheet[open] > summary { align-self: flex-end; background: var(--magenta); }
.sheet[open] > .sheet-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  width: 100%;
  max-width: 620px;
  margin: auto;
}
.sheet[open] > .sheet-list a {
  display: flex;
  min-height: 58px;
  padding: 14px 22px;
  font-size: clamp(18px, 4.4vw, 26px);
  font-weight: 700;
  color: #fff;
  background: rgba(255, 255, 255, 0.09);
  border-radius: 20px;
}
.sheet[open] > .sheet-list a:hover { background: var(--grape); transform: none; }

/* ---------- 首屏 ---------- */
.stage {
  position: relative;
  margin: clamp(14px, 3vw, 26px) var(--edge) 0;
  min-height: 45vh;
  padding: clamp(30px, 6vw, 58px) clamp(18px, 5vw, 64px) clamp(26px, 5vw, 44px);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  color: #fff;
  border-radius: var(--r);
  overflow: hidden;
  background-color: var(--grape);
  background-image:
    radial-gradient(circle at 1px 1px, rgba(255, 255, 255, 0.34) 1px, transparent 0),
    linear-gradient(128deg, var(--grape), var(--magenta) 58%, var(--ink));
  background-size: 18px 18px, auto;
  animation: drift 26s linear infinite;
}
@keyframes drift {
  to { background-position: 0 -176px, 0 0; }
}
.stage::after {
  content: "";
  position: absolute;
  left: -34px;
  bottom: -46px;
  width: 170px;
  height: 170px;
  border-radius: 46px;
  background: rgba(255, 255, 255, 0.13);
  transform: rotate(24deg);
}
.stage-art {
  position: absolute;
  top: 20px;
  right: 20px;
  width: 66px;
  height: 66px;
  border-radius: 20px;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.26);
  box-shadow: 0 10px 26px rgba(0, 0, 0, 0.2);
  transform: rotate(9deg);
}
.stage-art .art-img { width: 100%; height: 100%; object-fit: cover; }
.kicker {
  position: relative;
  margin: 0 0 12px;
  padding: 6px 16px;
  font-size: 16px;
  font-weight: 500;
  letter-spacing: 0.04em;
  background: rgba(28, 23, 38, 0.32);
  border-radius: 999px;
}
.stage h1 {
  position: relative;
  margin: 0 0 14px;
  max-width: 22ch;
  font-size: clamp(30px, 5.6vw, 54px);
  font-weight: 700;
  letter-spacing: -0.03em;
}
.lede {
  position: relative;
  margin: 0 auto 20px;
  max-width: 56ch;
  font-size: 17px;
  color: rgba(255, 255, 255, 0.92);
}
.stage-jump { position: relative; margin: 0; }
.stage-jump a {
  display: inline-flex;
  align-items: center;
  min-height: 46px;
  padding: 10px 24px;
  font-weight: 700;
  color: var(--ink);
  background: #fff;
  border-radius: 999px;
  text-decoration: none;
  transition: background 220ms ease, color 220ms ease, transform 220ms ease;
}
.stage-jump a:hover { background: var(--ink); color: #fff; transform: translateY(-2px); }

/* ---------- 内容区：左栏 + 正文 ---------- */
.layout {
  display: grid;
  grid-template-columns: 268px minmax(0, 1fr);
  gap: clamp(20px, 3vw, 42px);
  align-items: start;
  padding: clamp(22px, 4vw, 48px) var(--edge) clamp(32px, 5vw, 60px);
}

.rail {
  position: sticky;
  top: 140px;
  padding: 22px 18px 24px;
  background: var(--milk);
  border-radius: var(--r);
  box-shadow: 0 3px 0 var(--veil);
}
.rail h2 { margin: 0 0 10px; font-size: 18px; }
.rail hr {
  width: 58px;
  height: 6px;
  margin: 0 0 16px;
  border: 0;
  border-radius: 6px;
  background: linear-gradient(90deg, var(--grape), var(--magenta));
}
.rail-list { list-style: none; margin: 0 0 16px; padding: 0; display: grid; gap: 7px; }
.rail-list a {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 44px;
  padding: 9px 12px;
  font-size: 16px;
  color: var(--ink);
  background: var(--paper);
  border-radius: var(--r-s);
  text-decoration: none;
  transition: background 220ms ease, color 220ms ease, transform 220ms ease;
}
.rail-list a:hover { background: var(--ink); color: #fff; transform: translateX(3px); }
.rail-list .num {
  font-weight: 700;
  font-size: 16px;
  color: var(--magenta);
  font-variant-numeric: tabular-nums;
}
.rail-list a:hover .num { color: #ffc6ff; }
.rail-note {
  margin: 0;
  padding-top: 14px;
  font-size: 16px;
  line-height: 1.7;
  color: var(--ink-soft);
  border-top: 2px dotted var(--tint);
}

main { min-width: 0; }

.prose {
  display: flex;
  flex-direction: column;
  gap: clamp(28px, 4.4vw, 52px);
  min-width: 0;
}
.prose > article {
  padding: clamp(22px, 4vw, 42px);
  background: var(--milk);
  border-radius: var(--r);
  box-shadow: 0 3px 0 var(--veil);
  scroll-margin-top: 152px;
}
.prose h2 {
  margin: 0 0 14px;
  font-size: clamp(24px, 3.3vw, 34px);
  font-weight: 700;
}
.prose h3 {
  margin: 1.3em 0 10px;
  font-size: clamp(19px, 2.2vw, 22px);
}
.prose h2 + hr,
.prose h3 + hr {
  height: 8px;
  margin: 0 0 20px;
  border: 0;
  border-radius: 8px;
  background: linear-gradient(90deg, var(--magenta), var(--grape) 62%, transparent);
}
.prose ul, .prose ol { margin: 0 0 1.1em; padding-left: 1.3em; }
.prose li { margin-bottom: 0.4em; }
.prose blockquote {
  margin: 1.2em 0;
  padding: 14px 20px;
  background: var(--paper);
  border-left: 6px solid var(--grape);
  border-radius: 0 var(--r-s) var(--r-s) 0;
}
.prose code {
  padding: 2px 7px;
  font-size: 16px;
  background: var(--tint);
  border-radius: 8px;
}
.prose table { width: 100%; border-collapse: collapse; font-size: 16px; }
.prose th, .prose td { padding: 10px 12px; text-align: left; border-bottom: 2px solid var(--paper); }

/* ---------- 页脚 ---------- */
.foot {
  margin: 0 var(--edge) 40px;
  padding: clamp(28px, 5vw, 56px) clamp(20px, 4vw, 52px) clamp(22px, 3vw, 32px);
  color: #efe9ff;
  background-color: var(--ink);
  background-image: radial-gradient(circle at 1px 1px, rgba(191, 0, 255, 0.28) 1px, transparent 0);
  background-size: 22px 22px;
  border-radius: var(--r);
}
.foot-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.25fr;
  gap: 32px;
}
.foot-col h2 { margin: 0 0 12px; font-size: 24px; color: #fff; }
.foot-col h3 { margin: 4px 0 12px; font-size: 17px; color: #d3c0ff; letter-spacing: 0.02em; }
.foot-col hr {
  width: 60px;
  height: 6px;
  margin: 0 0 16px;
  border: 0;
  border-radius: 6px;
  background: linear-gradient(90deg, var(--magenta), var(--grape));
}
.foot address {
  font-style: normal;
  font-size: 16px;
  line-height: 1.75;
  color: #cbbcf0;
}
.foot address strong { display: block; margin-bottom: 6px; color: #fff; font-size: 17px; }
.foot ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 4px; }
.foot a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 8px 0;
  color: #d9cbff;
  font-size: 16px;
  text-decoration: none;
  transition: color 200ms ease, transform 200ms ease;
}
.foot a:hover { color: #fff; transform: translateX(3px); }

.subform { display: grid; gap: 10px; }
.subform input {
  min-height: 46px;
  padding: 11px 16px;
  font: inherit;
  font-size: 16px;
  color: #fff;
  background: rgba(255, 255, 255, 0.1);
  border: 2px solid rgba(255, 255, 255, 0.22);
  border-radius: var(--r-s);
}
.subform input::placeholder { color: #b6a6dd; }
.subform input:focus { outline: none; border-color: var(--magenta); }
.subform button {
  min-height: 48px;
  padding: 12px 20px;
  font: inherit;
  font-size: 16px;
  font-weight: 700;
  color: #fff;
  background: var(--grape);
  border: 0;
  border-radius: var(--r-s);
  cursor: pointer;
  transition: background 200ms ease;
}
.subform button:hover { background: var(--magenta); }

.foot-end {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 24px;
  margin-top: 32px;
  padding-top: 18px;
  border-top: 2px solid rgba(255, 255, 255, 0.14);
}
.copy { margin: 0; font-size: 16px; color: #b7a8d8; }
.foot-end-links { display: flex !important; gap: 18px; }

/* ---------- 滚动动效 ---------- */
.js .prose > article {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 460ms ease, transform 460ms cubic-bezier(0.2, 0.7, 0.3, 1);
  transition-delay: calc(var(--i, 0) * 45ms);
}
.js .prose > article.on { opacity: 1; transform: none; }

/* ---------- 断点 ---------- */
@media (max-width: 1080px) {
  .foot-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 900px) {
  .layout { grid-template-columns: 1fr; }
  .rail { position: static; }
  .rail-list { grid-template-columns: 1fr 1fr; display: grid; }
  .prose > article { scroll-margin-top: 132px; }
}

@media (max-width: 880px) {
  .sheet:not([open]) > .sheet-list { display: none; }
  .findbox { max-width: none; }
  .stage-art { width: 54px; height: 54px; top: 14px; right: 14px; }
}

@media (max-width: 620px) {
  body { font-size: 17px; }
  .brandline { padding-bottom: 6px; }
  .foot-grid { grid-template-columns: 1fr; gap: 22px; }
  .foot-end-links { gap: 12px; }
  .rail-list { grid-template-columns: 1fr; }
  .prose > article { padding: 20px 16px; }
  .stage h1 { font-size: clamp(28px, 8vw, 36px); }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .stage { animation: none; }
  .sheet[open] { animation: none; }
  .js .prose > article { opacity: 1; transform: none; transition: none; }
  * { transition-duration: 1ms !important; }
}

button[aria-expanded]{min-width:44px;min-height:44px}