@import url('https://fonts.googleapis.com/css2?family=Atkinson+Hyperlegible:wght@400;700&display=swap');

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

:root {
  --ink: #0d0d0d;
  --ink2: #14101c;
  --pri: #8000ff;
  --acc: #ff00ff;
  --fg: #f1eaff;
  --mute: #b3a5cb;
  --line: rgba(255, 0, 255, 0.26);
  --line2: rgba(128, 0, 255, 0.34);
  --glass: rgba(128, 0, 255, 0.08);
  --r: 28px;
}

html {
  scroll-behavior: smooth;
  background: var(--ink);
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background:
    radial-gradient(120% 60% at 100% 0%, rgba(128, 0, 255, 0.16), transparent 60%),
    radial-gradient(90% 50% at 0% 100%, rgba(255, 0, 255, 0.1), transparent 62%),
    var(--ink);
  color: var(--fg);
  font-family: 'Atkinson Hyperlegible', system-ui, -apple-system, 'Segoe UI', 'Noto Sans SC', sans-serif;
  font-size: 17px;
  line-height: 1.68;
  letter-spacing: 0.01em;
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 40;
  pointer-events: none;
  background: repeating-linear-gradient(180deg, rgba(255, 255, 255, 0.05) 0 1px, rgba(0, 0, 0, 0) 1px 4px);
  opacity: 0.5;
  mix-blend-mode: screen;
}

img { max-width: 100%; height: auto; display: block; }

h1, h2, h3 {
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: 0.015em;
}

a { color: #e3c8ff; }
a:hover { color: #fff; }

:focus-visible {
  outline: 2px solid var(--acc);
  outline-offset: 3px;
}

/* 顶部两行：品牌行 + 菜单行 */
.masthead {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(13, 13, 13, 0.86);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}

.brandrow {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 10px clamp(14px, 4vw, 40px);
  border-bottom: 1px dashed rgba(128, 0, 255, 0.32);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-height: 44px;
  color: #fff;
  text-decoration: none;
  font-size: 1.06rem;
  letter-spacing: 0.09em;
  text-shadow: 0 0 14px rgba(255, 0, 255, 0.55);
}

.brand svg, .brand img {
  width: 28px;
  height: 28px;
  color: var(--acc);
  filter: drop-shadow(0 0 7px var(--acc));
}

.cta {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 20px;
  border-radius: 999px;
  background: linear-gradient(115deg, var(--pri), var(--acc));
  color: #fff;
  font-weight: 700;
  font-size: 0.94rem;
  text-decoration: none;
  letter-spacing: 0.06em;
  box-shadow: 0 0 20px rgba(255, 0, 255, 0.42), inset 0 0 0 1px rgba(255, 255, 255, 0.22);
}

.cta:hover { color: #fff; box-shadow: 0 0 30px rgba(255, 0, 255, 0.72); }

.navrow { padding: 8px clamp(14px, 4vw, 40px) 10px; }

.menu > summary {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  min-height: 44px;
  padding: 0 15px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--mute);
  font-size: 0.9rem;
  letter-spacing: 0.14em;
  cursor: pointer;
  list-style: none;
  user-select: none;
}

.menu > summary::-webkit-details-marker { display: none; }

.menu > summary::before {
  content: "";
  width: 15px;
  height: 2px;
  background: var(--acc);
  box-shadow: 0 5px 0 var(--acc), 0 -5px 0 var(--acc);
  filter: drop-shadow(0 0 6px var(--acc));
}

.menu[open] > summary { color: var(--fg); border-color: var(--line2); }

.menulist {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 9px 0 2px;
  padding: 0;
  list-style: none;
}

.menulist a {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  min-height: 44px;
  padding: 0 14px;
  border: 1px solid transparent;
  border-radius: 12px;
  color: var(--fg);
  font-size: 0.94rem;
  text-decoration: none;
}

.menulist a:hover,
.menulist a:focus-visible {
  background: rgba(255, 0, 255, 0.12);
  border-color: var(--line);
  box-shadow: 0 0 16px rgba(128, 0, 255, 0.42);
  color: #fff;
}

.dot {
  width: 7px;
  height: 7px;
  flex: 0 0 auto;
  background: var(--pri);
  box-shadow: 0 0 9px var(--acc);
  transform: rotate(45deg);
}

/* Hero：大图 + 斜切底边 + 居中标题 */
.hero {
  position: relative;
  min-height: 70vh;
  display: grid;
  place-items: center;
  overflow: hidden;
  padding: 64px 20px 84px;
  text-align: center;
  clip-path: polygon(0 0, 100% 0, 100% 92%, 0 100%);
  background:
    radial-gradient(55% 65% at 22% 18%, rgba(128, 0, 255, 0.4), transparent 70%),
    radial-gradient(50% 62% at 84% 78%, rgba(255, 0, 255, 0.3), transparent 72%),
    #0b0b0e;
}

.heroMedia { position: absolute; inset: 0; }

.heroMedia img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.45;
  filter: saturate(1.15) contrast(1.05);
}

.heroNet {
  background-image:
    linear-gradient(rgba(128, 0, 255, 0.22) 1px, transparent 1px),
    linear-gradient(90deg, rgba(128, 0, 255, 0.22) 1px, transparent 1px);
  background-size: 46px 46px;
  mask-image: radial-gradient(70% 70% at 50% 45%, #000 20%, transparent 85%);
  -webkit-mask-image: radial-gradient(70% 70% at 50% 45%, #000 20%, transparent 85%);
}

.heroIn { position: relative; max-width: 20ch; }

.hero h1 {
  margin: 0;
  font-size: clamp(1.9rem, 7vw, 3.5rem);
  line-height: 1.18;
  color: #fff;
  text-shadow: 0 0 18px rgba(255, 0, 255, 0.6), 0 0 52px rgba(128, 0, 255, 0.68);
  animation: glitch 7s steps(1, end) infinite;
}

@keyframes glitch {
  0%, 90%, 100% { transform: none; }
  92% { transform: skewX(-7deg) translateX(-3px); text-shadow: -3px 0 var(--acc), 3px 0 #6ce0ff, 0 0 30px rgba(255, 0, 255, 0.6); }
  95% { transform: skewX(5deg) translateX(3px); text-shadow: 4px 0 var(--acc), -4px 0 #6ce0ff; }
}

/* 主体：左侧 aside + 右侧 div */
.shell {
  max-width: 1160px;
  margin: 0 auto;
  padding: clamp(22px, 5vw, 50px) clamp(14px, 4vw, 32px) 64px;
  display: grid;
  grid-template-columns: 248px minmax(0, 1fr);
  gap: clamp(16px, 3vw, 32px);
  align-items: start;
}

.side {
  position: sticky;
  top: 148px;
  padding: 16px 16px 20px;
  border: 1px solid var(--line2);
  border-radius: 22px;
  background: rgba(24, 16, 36, 0.72);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: inset 0 0 0 1px rgba(128, 0, 255, 0.16), 0 0 24px rgba(128, 0, 255, 0.16);
}

.side h2 {
  margin: 0 0 2px;
  font-size: 1.02rem;
  color: var(--acc);
  letter-spacing: 0.16em;
  text-shadow: 0 0 12px rgba(255, 0, 255, 0.6);
}

.side .subtitle {
  margin: 0 0 12px;
  font-size: 0.82rem;
  color: var(--mute);
  letter-spacing: 0.1em;
}

.side ol {
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: s;
}

.side li { counter-increment: s; border-top: 1px solid rgba(255, 0, 255, 0.14); }

.side li a {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 44px;
  color: var(--fg);
  font-size: 0.9rem;
  text-decoration: none;
}

.side li a::before {
  content: counter(s, decimal-leading-zero);
  color: var(--pri);
  font-size: 0.76rem;
  letter-spacing: 0.1em;
  text-shadow: 0 0 8px var(--pri);
}

.side li a:hover { color: #fff; padding-left: 3px; }

.body { min-width: 0; }

.body > section {
  scroll-margin-top: 156px;
  margin: 0 0 clamp(20px, 3vw, 30px);
  padding: clamp(20px, 3.6vw, 36px);
  border: 1px solid var(--line);
  border-radius: var(--r);
  background: var(--glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: inset 0 0 0 1px rgba(128, 0, 255, 0.16), 0 0 34px rgba(128, 0, 255, 0.13);
}

.body > section:last-child { margin-bottom: 0; }

.body section h2 {
  margin: 0 0 12px;
  font-size: clamp(1.22rem, 2.7vw, 1.62rem);
  color: #fff;
  text-shadow: 0 0 14px rgba(255, 0, 255, 0.48);
}

.body section h2::before {
  content: "";
  display: inline-block;
  width: 6px;
  height: 0.9em;
  margin-right: 11px;
  vertical-align: -0.04em;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--acc), var(--pri));
  box-shadow: 0 0 12px var(--acc);
  transform: skewX(-12deg);
}

.body section h2 + p {
  margin-top: -4px;
  color: var(--mute);
}

.body p { margin: 0 0 1.05em; }
.body p:last-child { margin-bottom: 0; }

.body ul, .body ol { margin: 0 0 1.05em; padding-left: 1.25em; }
.body li { margin: 0.3em 0; }
.body li::marker { color: var(--acc); }

.body strong { color: #fff; text-shadow: 0 0 10px rgba(255, 0, 255, 0.35); }

.body a {
  text-decoration: underline;
  text-decoration-color: rgba(255, 0, 255, 0.55);
  text-underline-offset: 3px;
}

.body blockquote {
  margin: 1.1em 0;
  padding: 12px 18px;
  border-left: 3px solid var(--acc);
  border-radius: 0 16px 16px 0;
  background: rgba(255, 0, 255, 0.07);
  color: #f6efff;
}

.body blockquote p:last-child { margin-bottom: 0; }

.body code {
  padding: 0.12em 0.4em;
  border-radius: 6px;
  background: rgba(255, 0, 255, 0.12);
  font-family: ui-monospace, 'Cascadia Mono', Menlo, monospace;
  font-size: 0.92em;
  color: #ffd9ff;
}

.body pre {
  overflow-x: auto;
  padding: 14px 16px;
  border: 1px solid var(--line2);
  border-radius: 16px;
  background: #0a0810;
  font-family: ui-monospace, 'Cascadia Mono', Menlo, monospace;
  font-size: 0.9em;
  line-height: 1.55;
}

.body pre code { padding: 0; background: none; color: #d7f7e2; }

.body figure { margin: 1.1em 0; }
.body figcaption { margin-top: 8px; font-size: 0.86rem; color: var(--mute); }

.body img, .body figure img { border-radius: 18px; border: 1px solid var(--line2); }

.body hr { border: 0; border-top: 1px dashed var(--line); margin: 1.4em 0; }

.body table { width: 100%; border-collapse: collapse; font-size: 0.94rem; }
.body th, .body td { padding: 9px 11px; border: 1px solid rgba(255, 0, 255, 0.2); text-align: left; }
.body th { background: rgba(128, 0, 255, 0.18); color: #fff; }

/* 页脚：四栏，address + 两组链接 + 版权 */
.foot {
  margin-top: 48px;
  border-top: 1px solid var(--line);
  background: linear-gradient(180deg, #0b0a10, #08080b);
}

.fgrid {
  max-width: 1160px;
  margin: 0 auto;
  padding: 44px clamp(14px, 4vw, 32px) 52px;
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr auto;
  gap: 26px;
  align-items: start;
}

.fgrid address { font-style: normal; }

.fbrand {
  margin: 0 0 6px;
  font-size: 1.04rem;
  font-weight: 700;
  color: #fff;
  letter-spacing: 0.09em;
  text-shadow: 0 0 14px rgba(255, 0, 255, 0.5);
}

.fhost { margin: 0; font-size: 0.88rem; color: var(--mute); letter-spacing: 0.06em; }

.fnav { margin: 0; padding: 0; list-style: none; }

.fnav li { border-bottom: 1px solid rgba(128, 0, 255, 0.18); }

.fnav a {
  display: flex;
  align-items: center;
  min-height: 42px;
  color: var(--mute);
  font-size: 0.9rem;
  text-decoration: none;
}

.fnav a:hover { color: var(--acc); }

.fsign p { margin: 0; font-size: 0.84rem; color: #8b80a3; letter-spacing: 0.06em; }

/* 回到顶部 */
.totop {
  position: fixed;
  right: 15px;
  bottom: 15px;
  z-index: 30;
  min-height: 44px;
  padding: 0 16px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(18, 12, 28, 0.92);
  color: var(--fg);
  font: inherit;
  font-size: 0.84rem;
  letter-spacing: 0.12em;
  cursor: pointer;
  opacity: 0;
  transform: translateY(12px);
  pointer-events: none;
  transition: opacity 0.24s ease, transform 0.24s ease;
  backdrop-filter: blur(10px);
}

.totop.show { opacity: 1; transform: none; pointer-events: auto; }
.totop:hover { border-color: var(--acc); box-shadow: 0 0 18px rgba(255, 0, 255, 0.5); }

/* 滚动揭示 */
.body > section.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.5s ease var(--d, 0s), transform 0.5s ease var(--d, 0s);
}

.body > section.reveal.in { opacity: 1; transform: none; }

@media (max-width: 860px) {
  .shell { grid-template-columns: 1fr; }
  .side { position: static; }
  .side ol { display: grid; grid-template-columns: 1fr 1fr; gap: 0 14px; }
  .side li { border-top: 1px solid rgba(255, 0, 255, 0.14); }
  .hero { min-height: 58vh; padding: 48px 18px 66px; }
  .fgrid { grid-template-columns: 1fr 1fr; gap: 22px; }
  .fsign { grid-column: 1 / -1; }
  .body > section { scroll-margin-top: 130px; }
}

@media (max-width: 520px) {
  body { font-size: 16.5px; }
  .fgrid { grid-template-columns: 1fr; }
  .fsign { grid-column: auto; }
  .menulist a { padding: 0 11px; font-size: 0.9rem; }
  .cta { padding: 0 15px; font-size: 0.9rem; }
  .brand { letter-spacing: 0.05em; }
  .hero { min-height: 54vh; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .hero h1 { animation: none; }
  .body > section.reveal { opacity: 1; transform: none; transition: none; }
  .totop { transition: none; }
}

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