:root {
  --ink: #26171f;
  --ink-deep: #180d13;
  --ink-soft: #331f2a;
  --pink: #ff0080;
  --magenta: #ff00ff;
  --text: #fbeaf3;
  --muted: #c9a7b8;
  --line: rgba(255, 255, 255, 0.16);
  --radius: 4px;
  --max: 1160px;
  --bar: 150px;
}

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

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

body {
  margin: 0;
  font-family: "Figtree", "Noto Sans", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  font-size: 17px;
  line-height: 1.75;
  color: var(--text);
  background-color: var(--ink-deep);
  background-image:
    radial-gradient(60% 42% at 8% 0%, rgba(255, 0, 128, 0.34), transparent 72%),
    radial-gradient(52% 40% at 92% 10%, rgba(255, 0, 255, 0.26), transparent 72%),
    radial-gradient(80% 50% at 50% 104%, rgba(255, 0, 128, 0.18), transparent 74%);
  background-attachment: fixed;
  background-repeat: no-repeat;
  overflow-x: hidden;
}

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

a {
  color: var(--text);
  text-decoration: none;
}

a:hover {
  color: #ffffff;
}

p {
  margin: 0 0 1.1em;
}

div[id] {
  scroll-margin-top: 160px;
}

.skip {
  position: absolute;
  left: 12px;
  top: -60px;
  z-index: 60;
  padding: 12px 18px;
  background: var(--pink);
  color: #fff;
  border-radius: var(--radius);
  font-weight: 600;
  transition: top 0.18s ease;
}

.skip:focus {
  top: 12px;
}

/* ---------- 页头：品牌行 + 菜单行 ---------- */
.masthead {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(24, 13, 19, 0.88);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}

.brand-row {
  max-width: var(--max);
  margin: 0 auto;
  padding: 14px 22px 10px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-height: 44px;
}

.brand-mark {
  width: 36px;
  height: 36px;
  flex: 0 0 36px;
  border-radius: var(--radius);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 19px;
  font-weight: 700;
  color: #fff;
  background: linear-gradient(135deg, var(--magenta), var(--pink));
  box-shadow: 0 0 22px rgba(255, 0, 128, 0.5);
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.25;
}

.brand-name {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.brand-sub {
  font-size: 13px;
  color: var(--muted);
  letter-spacing: 0.14em;
}

.brand-tag {
  margin: 0;
  font-size: 14px;
  color: var(--muted);
  max-width: 46ch;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.menu-row {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 22px 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  flex-wrap: wrap;
  border-top: 1px solid var(--line);
}

.menu {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  padding-top: 8px;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  padding: 10px 13px;
  font-size: 16px;
  font-weight: 500;
  color: var(--muted);
  border-radius: var(--radius);
  transition: color 0.16s ease, background 0.16s ease;
}

.nav-link:hover,
.nav-link:focus-visible {
  color: #fff;
  background: rgba(255, 0, 128, 0.22);
}

.cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 11px 22px;
  margin-top: 8px;
  font-size: 16px;
  font-weight: 700;
  color: #fff;
  border-radius: var(--radius);
  background: linear-gradient(100deg, var(--pink), var(--magenta));
  box-shadow: 0 6px 24px rgba(255, 0, 128, 0.36);
}

.cta:hover {
  color: #fff;
  box-shadow: 0 8px 30px rgba(255, 0, 255, 0.5);
}

/* ---------- 首屏 ---------- */
.hero {
  position: relative;
  overflow: hidden;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 120px 22px 120px;
  isolation: isolate;
}

.aurora {
  position: absolute;
  inset: -12% -8%;
  margin: 0;
  z-index: -1;
  pointer-events: none;
  transform: translate3d(0, var(--py, 0px), 0);
  will-change: transform;
}

.blob {
  position: absolute;
  display: block;
  border-radius: 50%;
  filter: blur(70px);
  mix-blend-mode: screen;
  opacity: 0.85;
}

.b1 {
  width: 58vw;
  height: 58vw;
  left: -8vw;
  top: 2vh;
  background: radial-gradient(circle at 40% 40%, #ff0080, rgba(255, 0, 128, 0) 68%);
  animation: drift1 20s ease-in-out infinite alternate;
}

.b2 {
  width: 46vw;
  height: 46vw;
  right: -6vw;
  top: -6vh;
  background: radial-gradient(circle at 55% 45%, #ff00ff, rgba(255, 0, 255, 0) 66%);
  animation: drift2 24s ease-in-out infinite alternate;
}

.b3 {
  width: 62vw;
  height: 40vw;
  left: 22vw;
  bottom: -18vh;
  background: radial-gradient(circle at 50% 50%, #ff5cb0, rgba(255, 92, 176, 0) 70%);
  animation: drift3 28s ease-in-out infinite alternate;
}

.veil {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(24, 13, 19, 0.35), rgba(24, 13, 19, 0.82));
}

@keyframes drift1 {
  from { transform: translate3d(0, 0, 0) scale(1); }
  to { transform: translate3d(6vw, 8vh, 0) scale(1.18); }
}

@keyframes drift2 {
  from { transform: translate3d(0, 0, 0) scale(1.1); }
  to { transform: translate3d(-7vw, 9vh, 0) scale(0.92); }
}

@keyframes drift3 {
  from { transform: translate3d(0, 0, 0) scale(0.96); }
  to { transform: translate3d(-5vw, -7vh, 0) scale(1.2); }
}

.hero-copy {
  position: relative;
  max-width: 900px;
}

.eyebrow {
  margin: 0 0 18px;
  font-size: 14px;
  letter-spacing: 0.28em;
  text-transform: none;
  color: #ffd0e6;
}

.hero h1 {
  margin: 0 0 22px;
  font-size: clamp(2.15rem, 7vw, 4.5rem);
  line-height: 1.14;
  font-weight: 700;
  letter-spacing: -0.01em;
  background: linear-gradient(102deg, #ffffff 8%, #ffc4e2 42%, #ff6ec7 72%, #ffffff 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  text-shadow: 0 0 46px rgba(255, 0, 128, 0.24);
}

.lede {
  max-width: 46ch;
  margin: 0 auto 32px;
  color: #e8c9da;
  font-size: clamp(1rem, 2.2vw, 1.15rem);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  justify-content: center;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  padding: 13px 28px;
  font-size: 16px;
  font-weight: 700;
  border-radius: var(--radius);
  color: #fff;
  background: linear-gradient(100deg, var(--pink), var(--magenta));
  box-shadow: 0 10px 30px rgba(255, 0, 128, 0.36);
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}

.btn:hover {
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 14px 38px rgba(255, 0, 255, 0.46);
}

.btn.ghost {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--line);
  box-shadow: none;
}

.scroll-hint {
  margin: 34px 0 0;
  font-size: 14px;
  color: var(--muted);
  letter-spacing: 0.08em;
}

.slash {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 90px;
  background: linear-gradient(100deg, var(--pink), var(--magenta) 55%, rgba(255, 0, 128, 0.15) 100%);
  clip-path: polygon(0 62%, 100% 0, 100% 34%, 0 96%);
  opacity: 0.92;
}

/* ---------- 正文 + 右侧栏 ---------- */
.main {
  display: block;
}

.stage {
  max-width: var(--max);
  margin: 0 auto;
  padding: 62px 22px 84px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 292px;
  gap: 48px;
  align-items: start;
}

.stage-body {
  min-width: 0;
}

.stage-body > div {
  padding: 0 0 40px;
  margin-bottom: 40px;
  border-bottom: 1px dashed rgba(255, 255, 255, 0.14);
}

.stage-body > div:last-child {
  border-bottom: 0;
  margin-bottom: 0;
}

.stage-body h2 {
  font-size: clamp(1.5rem, 3.4vw, 2rem);
  line-height: 1.3;
  margin: 0 0 18px;
  font-weight: 700;
  color: #fff;
  letter-spacing: -0.005em;
}

.stage-body h3 {
  font-size: 1.2rem;
  margin: 0 0 12px;
  color: #ffd3e8;
}

.stage-body p,
.stage-body li {
  color: #edd8e3;
}

.stage-body ul,
.stage-body ol {
  padding-left: 1.25em;
  margin: 0 0 1.2em;
}

.stage-body li {
  margin-bottom: 0.5em;
}

.stage-body strong {
  color: #fff;
}

.stage-body blockquote {
  margin: 0 0 1.2em;
  padding: 16px 20px;
  border-radius: var(--radius);
  background: var(--ink-soft);
  color: #ffd9ec;
}

.stage-body a {
  color: #ff9ad0;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.stage-body code {
  font-size: 0.92em;
  padding: 2px 6px;
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.1);
}

.stage-body figure {
  margin: 0 0 1.3em;
}

.stage-body img {
  border-radius: var(--radius);
}

/* 侧栏 */
.side {
  position: sticky;
  top: 168px;
  align-self: start;
  padding: 22px 20px;
  border-radius: var(--radius);
  background: var(--ink-soft);
  background-image: linear-gradient(160deg, rgba(255, 0, 128, 0.22), rgba(255, 0, 255, 0.06) 60%, transparent);
}

.side-title {
  margin: 0 0 10px;
  font-size: 17px;
  letter-spacing: 0.08em;
  color: #fff;
}

.side hr {
  margin: 0 0 14px;
}

.side-list {
  list-style: none;
  margin: 0 0 16px;
  padding: 0;
  display: grid;
  gap: 2px;
}

.side-list li {
  margin: 0;
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 0.4s ease, transform 0.4s ease;
}

.side-list li.is-in {
  opacity: 1;
  transform: none;
}

.side-list a {
  display: flex;
  align-items: center;
  min-height: 40px;
  padding: 8px 10px;
  font-size: 15px;
  color: #f0d6e4;
  border-radius: var(--radius);
}

.side-list a:hover {
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
}

.side-note {
  margin: 0;
  font-size: 14px;
  line-height: 1.6;
  color: var(--muted);
}

hr {
  display: block;
  width: 56px;
  height: 3px;
  border: 0;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--pink), var(--magenta));
}

/* ---------- 页脚 ---------- */
.foot {
  position: relative;
  margin-top: 20px;
  padding: 56px 22px 34px;
  background: #1c1017;
  border-top: 1px solid var(--line);
}

.foot::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 4px;
  background: linear-gradient(90deg, var(--pink), var(--magenta) 60%, var(--pink));
}

.foot-top {
  max-width: var(--max);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 40px;
  padding-bottom: 32px;
}

.foot-logo {
  margin: 0 0 12px;
  font-size: 22px;
  font-weight: 700;
  color: #fff;
}

.foot address {
  font-style: normal;
  display: grid;
  gap: 6px;
  font-size: 15px;
  color: var(--muted);
  max-width: 40ch;
}

.foot-org {
  color: #ffc0df;
  font-weight: 600;
}

.foot-links {
  display: grid;
  gap: 18px;
}

.foot-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}

.foot-nav dl {
  margin: 0;
}

.foot-nav dt {
  font-size: 13px;
  letter-spacing: 0.18em;
  color: var(--magenta);
  margin-bottom: 6px;
}

.foot-nav dd {
  margin: 0;
}

.foot-nav a,
.foot-quick a {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  font-size: 16px;
  color: #edcddd;
}

.foot-nav a:hover,
.foot-quick a:hover {
  color: #fff;
  text-decoration: underline;
  text-underline-offset: 4px;
}

.foot-quick {
  list-style: none;
  margin: 0;
  padding: 12px 0 0;
  display: flex;
  flex-wrap: wrap;
  gap: 4px 18px;
  border-top: 1px solid var(--line);
}

.foot-form {
  max-width: var(--max);
  margin: 0 auto;
  padding: 26px 0;
  border-top: 1px solid var(--line);
}

.foot-form label {
  display: block;
  margin-bottom: 10px;
  font-size: 15px;
  color: #ffd6ea;
}

.foot-form-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.foot-form input {
  flex: 1 1 240px;
  min-height: 48px;
  padding: 12px 14px;
  font-size: 16px;
  font-family: inherit;
  color: var(--text);
  background: #2a1822;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.foot-form input::placeholder {
  color: #9d7c8c;
}

.foot-form input:focus {
  outline: 2px solid var(--pink);
  outline-offset: 1px;
}

.foot-form button {
  min-height: 48px;
  padding: 12px 26px;
  font-size: 16px;
  font-weight: 700;
  font-family: inherit;
  color: #fff;
  cursor: pointer;
  border: 0;
  border-radius: var(--radius);
  background: linear-gradient(100deg, var(--magenta), var(--pink));
}

.foot-bottom {
  max-width: var(--max);
  margin: 0 auto;
  padding-top: 22px;
  border-top: 1px solid var(--line);
  text-align: center;
}

.copy {
  margin: 0 0 6px;
  font-size: 15px;
  color: #e3c3d4;
}

.note {
  margin: 0;
  font-size: 14px;
  color: #a98a9a;
}

/* ---------- 断点 ---------- */
@media (max-width: 980px) {
  .stage {
    grid-template-columns: minmax(0, 1fr);
    gap: 34px;
    padding-top: 44px;
  }

  .side {
    position: static;
    order: -1;
  }

  .side-list {
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  }

  .foot-top {
    grid-template-columns: minmax(0, 1fr);
    gap: 26px;
  }
}

@media (max-width: 620px) {
  body {
    font-size: 16.5px;
    background-attachment: scroll;
  }

  .brand-row {
    padding: 12px 16px 8px;
    gap: 12px;
  }

  .brand-tag {
    display: none;
  }

  .menu-row {
    padding: 0 16px 10px;
  }

  .nav-link {
    padding: 9px 10px;
    font-size: 15.5px;
  }

  .cta {
    margin-left: auto;
    padding: 10px 16px;
    min-height: 42px;
    font-size: 15px;
  }

  .hero {
    min-height: 92vh;
    padding: 132px 18px 108px;
  }

  .eyebrow {
    letter-spacing: 0.16em;
    font-size: 13px;
  }

  .btn {
    padding: 12px 20px;
    min-height: 48px;
  }

  .stage {
    padding: 34px 16px 64px;
  }

  .foot {
    padding: 44px 16px 28px;
  }

  .foot-nav {
    grid-template-columns: 1fr 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .blob {
    animation: none;
  }

  .aurora {
    transform: none;
  }

  .side-list li {
    opacity: 1;
    transform: none;
  }

  .btn {
    transition: none;
  }
}

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