@import url('https://fonts.googleapis.com/css2?family=Bebas+Neue&family=Source+Sans+3:wght@300;400;500;600;700&display=swap');

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

:root {
  --red: #ff0000;
  --pink: #ff006e;
  --ink: #1a1a2e;
  --deep: #07070f;
  --txt: #ece9f6;
  --dim: #a8a4c2;
  --line: rgba(255, 0, 110, 0.34);
  --soft: rgba(255, 255, 255, 0.1);
  --r: 18px;
  --f-title: 'Bebas Neue', 'Source Sans 3', 'PingFang SC', 'Microsoft YaHei', system-ui, sans-serif;
  --f-body: 'Source Sans 3', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', system-ui, sans-serif;
}

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

body {
  margin: 0;
  color: var(--txt);
  font-family: var(--f-body);
  font-size: 17px;
  line-height: 1.72;
  overflow-x: hidden;
  background-color: var(--deep);
  background-image:
    radial-gradient(820px 480px at 88% -8%, rgba(255, 0, 110, 0.22), transparent 66%),
    radial-gradient(640px 400px at 0% 16%, rgba(255, 0, 0, 0.14), transparent 64%),
    repeating-linear-gradient(90deg, rgba(150, 150, 255, 0.055) 0 1px, transparent 1px 44px),
    repeating-linear-gradient(0deg, rgba(150, 150, 255, 0.04) 0 1px, transparent 1px 44px);
}

body::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: 90;
  pointer-events: none;
  opacity: 0.5;
  background: repeating-linear-gradient(
    0deg,
    rgba(4, 4, 10, 0.6) 0 1px,
    rgba(4, 4, 10, 0) 1px 3px
  );
}

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

a {
  color: var(--txt);
}

h1,
h2,
h3,
.brand,
.foot-huge {
  font-family: var(--f-title);
  font-weight: 400;
  letter-spacing: 0.03em;
  line-height: 1.1;
}

small {
  display: block;
  font-family: var(--f-body);
  font-size: 0.76rem;
  font-weight: 600;
  letter-spacing: 0.24em;
  color: var(--pink);
  text-transform: uppercase;
}

/* ---------- 顶栏 ---------- */
.top {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 14px;
  max-width: 1180px;
  margin: 0 auto;
  padding: 16px 20px;
  border-bottom: 1px solid rgba(255, 0, 110, 0.24);
}

.brandbox {
  display: flex;
  align-items: center;
  gap: 10px;
  white-space: nowrap;
}

.mark {
  display: block;
  line-height: 0;
  padding: 4px;
  border: 1px solid var(--line);
  border-radius: 12px;
}

.mark img {
  display: block;
  height: 30px;
  width: auto;
}

.brand {
  font-size: 1.5rem;
  color: #fff;
  text-shadow: 0 0 16px rgba(255, 0, 110, 0.6);
}

.nav ol {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: 2px;
}

.nav--r ol {
  justify-content: flex-end;
  align-items: center;
}

.nav a {
  display: inline-flex;
  align-items: center;
  min-height: 42px;
  padding: 0 10px;
  font-size: 0.95rem;
  color: var(--dim);
  text-decoration: none;
  border-radius: 10px;
}

.nav a::before {
  content: '';
  width: 5px;
  height: 5px;
  margin-right: 7px;
  background: var(--pink);
  transform: rotate(45deg);
  box-shadow: 0 0 8px var(--pink);
}

.nav a:hover,
.nav a:focus-visible {
  color: #fff;
  text-shadow: 0 0 12px rgba(255, 0, 110, 0.85);
}

.cta-cell {
  margin-left: 8px;
}

.cta {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  padding: 0 18px;
  border-radius: 999px;
  color: #fff !important;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-decoration: none;
  background: linear-gradient(100deg, var(--red), var(--pink));
  box-shadow: 0 0 20px rgba(255, 0, 110, 0.5);
}

.cta::before {
  display: none;
}

/* ---------- 粘性锚点条 ---------- */
.dock {
  position: sticky;
  top: 0;
  z-index: 60;
  background: rgba(9, 9, 20, 0.93);
  border-bottom: 1px solid var(--line);
}

.dock ol {
  display: flex;
  gap: 4px;
  list-style: none;
  margin: 0 auto;
  padding: 4px 14px;
  max-width: 1180px;
  overflow-x: auto;
  scrollbar-width: none;
}

.dock ol::-webkit-scrollbar {
  display: none;
}

.dock a {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  padding: 0 11px;
  font-size: 0.9rem;
  letter-spacing: 0.05em;
  color: var(--dim);
  text-decoration: none;
  white-space: nowrap;
  border-bottom: 2px solid transparent;
}

.dock a::before {
  content: '';
  width: 4px;
  height: 4px;
  margin-right: 6px;
  background: var(--red);
  box-shadow: 0 0 8px var(--red);
}

.dock a:hover,
.dock a:focus-visible {
  color: #fff;
  border-bottom-color: var(--pink);
}

/* ---------- 首屏 ---------- */
.hero {
  max-width: 1180px;
  margin: 0 auto;
  padding: 46px 20px 56px;
  min-height: 70vh;
  display: grid;
  align-content: center;
  gap: 34px;
  text-align: right;
}

.kicker {
  margin: 0 0 10px;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.34em;
  color: var(--pink);
  text-transform: uppercase;
  text-shadow: 0 0 14px rgba(255, 0, 110, 0.7);
}

.hero h1 {
  margin: 0;
  font-size: clamp(2.7rem, 8vw, 5.8rem);
  color: #fff;
  animation: glitch 9s steps(1) infinite;
  text-shadow: 0 0 22px rgba(255, 0, 110, 0.6), 0 0 60px rgba(255, 0, 0, 0.32);
}

.lede {
  margin: 16px 0 0 auto;
  max-width: 52ch;
  font-size: 1.05rem;
  color: var(--dim);
}

.hero-fig {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--r);
  overflow: hidden;
  line-height: 0;
  background: rgba(26, 26, 46, 0.7);
}

.hero-fig img {
  width: 100%;
  height: auto;
  display: block;
  will-change: transform;
}

@keyframes glitch {
  0%, 86%, 100% {
    transform: none;
    text-shadow: 0 0 22px rgba(255, 0, 110, 0.6), 0 0 60px rgba(255, 0, 0, 0.32);
  }
  88% {
    transform: skewX(-5deg) translateX(-4px);
    text-shadow: -3px 0 var(--pink), 3px 0 var(--red);
  }
  92% {
    transform: skewX(4deg) translateX(3px);
    text-shadow: 3px 0 var(--red), -3px 0 var(--pink);
  }
  96% {
    transform: none;
    text-shadow: 0 0 22px rgba(255, 0, 110, 0.6), 0 0 60px rgba(255, 0, 0, 0.32);
  }
}

/* ---------- 主体 ---------- */
.stage {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 306px;
  gap: 44px;
  align-items: start;
  max-width: 1180px;
  margin: 0 auto;
  padding: 54px 20px 76px;
}

.prose {
  min-width: 0;
}

.prose > article {
  padding: 36px 0 40px;
  border-top: 1px solid var(--soft);
  scroll-margin-top: 92px;
}

.prose > article:first-child {
  border-top: 0;
  padding-top: 4px;
}

article[id] {
  scroll-margin-top: 92px;
}

.prose h2 {
  margin: 0.15em 0 0.55em;
  padding-left: 15px;
  border-left: 4px solid var(--red);
  font-size: clamp(1.7rem, 3.4vw, 2.4rem);
  color: #fff;
  text-shadow: 0 0 18px rgba(255, 0, 110, 0.48);
}

.prose h3 {
  margin: 1.4em 0 0.4em;
  font-size: clamp(1.2rem, 2.2vw, 1.45rem);
  color: var(--pink);
  text-shadow: 0 0 14px rgba(255, 0, 110, 0.4);
}

.prose p {
  margin: 0 0 1.05em;
}

.prose a {
  color: #fff;
  text-decoration: none;
  border-bottom: 1px solid var(--pink);
  padding-bottom: 1px;
}

.prose a:hover {
  text-shadow: 0 0 12px rgba(255, 0, 110, 0.8);
}

.prose ul,
.prose ol {
  padding-left: 1.3em;
  margin: 0 0 1.1em;
}

.prose li {
  margin: 0.4em 0;
}

.prose li::marker {
  color: var(--pink);
}

.prose strong {
  color: #fff;
}

.prose blockquote {
  margin: 1.2em 0;
  padding: 6px 0 6px 18px;
  border-left: 2px dashed var(--line);
  color: var(--dim);
}

.prose table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.2em 0;
  font-size: 0.96rem;
}

.prose th,
.prose td {
  border: 1px solid var(--soft);
  padding: 9px 11px;
  text-align: left;
}

.prose th {
  background: rgba(255, 0, 110, 0.12);
  color: #fff;
}

/* ---------- 侧栏 ---------- */
.side {
  position: sticky;
  top: 74px;
  padding: 18px 16px 16px;
  border: 1px solid var(--line);
  border-radius: var(--r);
  background: rgba(19, 19, 36, 0.72);
}

.side small {
  margin-bottom: 4px;
}

.side h2 {
  margin: 0 0 12px;
  font-size: 1.55rem;
  color: #fff;
  text-shadow: 0 0 16px rgba(255, 0, 110, 0.55);
}

.side-list {
  list-style: none;
  margin: 0 0 16px;
  padding: 0;
}

.side-list a {
  display: flex;
  align-items: center;
  min-height: 40px;
  padding: 0 2px;
  font-size: 0.95rem;
  color: var(--dim);
  text-decoration: none;
  border-bottom: 1px dashed rgba(255, 255, 255, 0.13);
}

.side-list a::before {
  content: '';
  width: 6px;
  height: 6px;
  margin-right: 9px;
  border: 1px solid var(--pink);
  transform: rotate(45deg);
}

.side-list a:hover {
  color: #fff;
}

.up {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: #fff;
  text-decoration: none;
  letter-spacing: 0.08em;
}

.up:hover {
  background: rgba(255, 0, 110, 0.16);
}

/* ---------- 页脚 ---------- */
.foot {
  border-top: 1px solid rgba(255, 0, 110, 0.32);
  background: linear-gradient(180deg, rgba(26, 26, 46, 0.92), var(--deep) 70%);
  padding: 52px 20px 26px;
}

.foot-cta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  max-width: 1140px;
  margin: 0 auto 42px;
  padding: 26px 24px;
  border: 1px solid var(--line);
  border-radius: var(--r);
  background: rgba(12, 12, 24, 0.6);
}

.foot-huge {
  margin: 0;
  font-size: clamp(1.6rem, 4.4vw, 2.7rem);
  color: #fff;
  text-shadow: 0 0 20px rgba(255, 0, 0, 0.5);
}

.btn {
  display: inline-flex;
  align-items: center;
  min-height: 46px;
  padding: 0 24px;
  border-radius: 999px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: #fff;
  text-decoration: none;
  background: linear-gradient(100deg, var(--red), var(--pink));
  box-shadow: 0 0 22px rgba(255, 0, 110, 0.45);
}

.foot-cols {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
  max-width: 1140px;
  margin: 0 auto;
}

.foot-cols dl {
  margin: 0;
}

.foot-cols dt {
  margin-bottom: 8px;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.22em;
  color: var(--pink);
  text-transform: uppercase;
}

.foot-cols dd {
  margin: 0;
  font-size: 0.95rem;
  color: var(--dim);
}

.foot-cols dd a {
  display: flex;
  align-items: center;
  min-height: 40px;
  color: var(--dim);
  text-decoration: none;
}

.foot-cols dd a::before {
  content: '';
  width: 4px;
  height: 4px;
  margin-right: 8px;
  background: var(--red);
  box-shadow: 0 0 8px var(--red);
}

.foot-cols dd a:hover {
  color: #fff;
}

.foot-base {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 10px 22px;
  max-width: 1140px;
  margin: 34px auto 0;
  padding-top: 16px;
  border-top: 1px dashed rgba(255, 255, 255, 0.15);
  font-size: 0.9rem;
  color: var(--dim);
}

.foot-base p {
  margin: 0;
}

.base-links {
  display: flex;
  gap: 4px;
}

.base-links a {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  padding: 0 10px;
  color: var(--dim);
  text-decoration: none;
}

.base-links a:hover {
  color: #fff;
}

/* ---------- 滚动显现 ---------- */
.rv {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.rv.in {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  .rv {
    transition: none;
  }
  .hero h1 {
    animation: none;
  }
}

/* ---------- 小屏 ---------- */
@media (max-width: 960px) {
  .stage {
    grid-template-columns: 1fr;
    gap: 34px;
    padding-top: 40px;
  }
  .side {
    position: static;
    order: 2;
  }
  .top {
    grid-template-columns: 1fr;
    justify-items: center;
    gap: 8px;
    padding-bottom: 10px;
  }
  .nav ol,
  .nav--r ol {
    flex-wrap: wrap;
    justify-content: center;
  }
  .cta-cell {
    margin-left: 0;
  }
  .hero {
    min-height: 0;
    padding-top: 30px;
  }
  .foot-cols {
    grid-template-columns: 1fr;
    gap: 14px;
  }
}

@media (max-width: 520px) {
  body {
    font-size: 16px;
  }
  .hero h1 {
    font-size: clamp(2.1rem, 11vw, 3rem);
  }
  .lede {
    font-size: 1rem;
  }
  .foot-cta {
    padding: 20px 16px;
  }
  .foot-base {
    flex-direction: column;
  }
}

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