@import url('https://fonts.googleapis.com/css2?family=Caveat:wght@400;500;600;700&family=Quicksand:wght@300;400;500;600;700&display=swap');

:root {
  --red: #ff0000;
  --red-soft: #ff8f80;
  --purple: #8b00ff;
  --purple-soft: #cba6ff;
  --ink: #261717;
  --cream: #fdf4ee;
  --dim: #ddc9c0;
  --glass: rgba(255, 255, 255, 0.13);
  --glass-2: rgba(255, 255, 255, 0.2);
  --line: rgba(255, 255, 255, 0.22);
  --r: 18px;
  --head-h: 168px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-height: 100vh;
  overflow-x: hidden;
  font-family: 'Quicksand', system-ui, -apple-system, 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  font-size: 17px;
  line-height: 1.78;
  color: var(--cream);
  background:
    radial-gradient(58% 46% at 10% 6%, rgba(255, 0, 0, 0.55), transparent 70%),
    radial-gradient(52% 44% at 90% 10%, rgba(139, 0, 255, 0.5), transparent 72%),
    radial-gradient(76% 58% at 46% 104%, rgba(255, 0, 0, 0.26), transparent 76%),
    linear-gradient(165deg, #321e18 0%, #261717 46%, #1a1011 100%);
  background-attachment: fixed;
}

body::before {
  content: '';
  position: fixed;
  inset: -10%;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(28% 22% at 72% 30%, rgba(255, 255, 255, 0.16), transparent 70%),
    radial-gradient(24% 20% at 22% 68%, rgba(139, 0, 255, 0.28), transparent 72%);
  filter: blur(38px);
}

h1, h2, h3 { line-height: 1.32; }

a { color: var(--cream); }
a:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--red-soft);
  outline-offset: 3px;
  border-radius: 8px;
}

article[id] { scroll-margin-top: calc(var(--head-h) + 18px); }

/* ---------- 顶部 ---------- */
.sitehead {
  position: sticky;
  top: 0;
  z-index: 40;
  padding: 0 clamp(14px, 4vw, 42px);
  background: linear-gradient(180deg, rgba(38, 23, 23, 0.9), rgba(38, 23, 23, 0.58));
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(16px) saturate(150%);
  -webkit-backdrop-filter: blur(16px) saturate(150%);
}

.ticker {
  margin: 0;
  padding: 7px 0 6px;
  font-size: 14px;
  letter-spacing: 0.04em;
  color: var(--dim);
  border-bottom: 1px dashed rgba(255, 255, 255, 0.16);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.ticker b {
  display: inline-block;
  margin-right: 8px;
  padding: 1px 9px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: #fff;
  background: linear-gradient(100deg, var(--red), var(--purple));
}

.brandline {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 9px 0 8px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-height: 44px;
  text-decoration: none;
}

.logomark,
.brand .logo {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: linear-gradient(140deg, var(--red), var(--purple));
  color: #fff;
  font-weight: 700;
  font-size: 18px;
  object-fit: cover;
}

.brandname {
  font-family: 'Caveat', 'Quicksand', system-ui, sans-serif;
  font-size: 1.42rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.brandtag {
  margin-left: auto;
  font-size: 14px;
  color: var(--dim);
  letter-spacing: 0.06em;
}

.menubar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 2px 0 11px;
}

.menuhint {
  font-size: 14px;
  color: var(--dim);
  letter-spacing: 0.05em;
}

.drawer { position: relative; }

.drawer > summary {
  position: relative;
  z-index: 60;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-height: 44px;
  padding: 9px 18px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  font-size: 16px;
  font-weight: 600;
  letter-spacing: 0.04em;
  cursor: pointer;
  list-style: none;
  user-select: none;
}

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

.burger,
.burger::before,
.burger::after {
  display: block;
  width: 18px;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
}

.burger { position: relative; }

.burger::before,
.burger::after {
  content: '';
  position: absolute;
  left: 0;
}

.burger::before { top: -6px; }
.burger::after { top: 6px; }

.drawer[open] > summary {
  background: linear-gradient(110deg, rgba(255, 0, 0, 0.55), rgba(139, 0, 255, 0.5));
}

.drawer > menu {
  position: fixed;
  inset: 0;
  z-index: 50;
  margin: 0;
  padding: clamp(24px, 7vw, 78px);
  list-style: none;
  display: grid;
  align-content: center;
  gap: 8px;
  overflow: auto;
  background: rgba(30, 18, 18, 0.74);
  backdrop-filter: blur(20px) saturate(150%);
  -webkit-backdrop-filter: blur(20px) saturate(150%);
}

.drawer > menu li a {
  display: flex;
  align-items: center;
  gap: 14px;
  min-height: 54px;
  padding: 12px 18px;
  border-radius: var(--r);
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.1);
  text-decoration: none;
  font-size: 1.06rem;
  font-weight: 600;
}

.drawer > menu li a:hover {
  background: rgba(255, 255, 255, 0.2);
  border-color: var(--red-soft);
}

.num {
  font-family: 'Caveat', sans-serif;
  font-size: 1.25rem;
  letter-spacing: 0.06em;
  color: var(--purple-soft);
}

/* ---------- 主体骨架 ---------- */
main {
  position: relative;
  z-index: 1;
  max-width: 1140px;
  margin: 0 auto;
  padding: clamp(18px, 4vw, 40px) clamp(14px, 4vw, 40px) clamp(30px, 5vw, 56px);
  display: grid;
  grid-template-columns: minmax(0, 1fr) 302px;
  gap: clamp(16px, 2.4vw, 26px);
  align-items: start;
}

.hero {
  grid-column: 1 / -1;
  position: relative;
  overflow: hidden;
  min-height: 45vh;
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: clamp(20px, 4vw, 38px);
  border-radius: calc(var(--r) + 12px);
  border: 1px solid var(--line);
  background: var(--glass);
  backdrop-filter: blur(18px) saturate(140%);
  -webkit-backdrop-filter: blur(18px) saturate(140%);
}

.hero > *:not(.orb) { position: relative; z-index: 1; }

.orb {
  position: absolute;
  right: -70px;
  bottom: -80px;
  z-index: 0;
  width: 260px;
  height: 260px;
  border-radius: 50%;
  background: radial-gradient(circle at 32% 30%, rgba(255, 0, 0, 0.85), rgba(139, 0, 255, 0.55) 58%, transparent 74%);
  filter: blur(20px);
  opacity: 0.72;
  pointer-events: none;
  will-change: transform;
}

.badge {
  align-self: flex-start;
  margin: 0;
  padding: 6px 14px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.34);
  background: rgba(255, 255, 255, 0.16);
  font-size: 15px;
  letter-spacing: 0.08em;
  color: #fff;
  transform: rotate(-1.6deg);
}

.hero h1 {
  margin: 0;
  font-size: clamp(1.92rem, 5.2vw, 3rem);
  font-weight: 700;
  letter-spacing: 0.015em;
  text-wrap: balance;
}

.lede {
  margin: 0;
  max-width: 46ch;
  font-size: 1.04rem;
  color: var(--dim);
}

.herobtns {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 4px 0 0;
}

.btn {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 10px 20px;
  border-radius: 999px;
  border: 1px solid transparent;
  text-decoration: none;
  font-weight: 700;
  font-size: 16px;
  letter-spacing: 0.04em;
  color: #fff;
  background: linear-gradient(105deg, var(--red), #c4004f 52%, var(--purple));
}

.btn.ghost {
  background: var(--glass-2);
  border-color: var(--line);
  color: var(--cream);
}

.btn.ghost:hover { border-color: var(--red-soft); }

.herofig {
  margin: 6px 0 0;
  border-radius: var(--r);
  overflow: hidden;
  border: 1px solid var(--line);
  background: rgba(0, 0, 0, 0.2);
}

.heroimg {
  display: block;
  width: 100%;
  max-height: 330px;
  object-fit: cover;
}

/* ---------- 正文 ---------- */
.paper {
  grid-column: 1;
  min-width: 0;
  padding: clamp(20px, 3.4vw, 42px);
  border-radius: calc(var(--r) + 8px);
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(15px);
  -webkit-backdrop-filter: blur(15px);
}

.paper small {
  display: block;
  margin: 1.7rem 0 -0.35rem;
  font-family: 'Caveat', 'Quicksand', sans-serif;
  font-size: 1.06rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--red-soft);
}

.paper h2 {
  margin: 0.6rem 0 0.9rem;
  padding-left: 0.72rem;
  border-left: 4px solid var(--red);
  font-size: clamp(1.28rem, 2.7vw, 1.66rem);
}

.paper h3 {
  margin: 1.9rem 0 0.6rem;
  font-size: clamp(1.1rem, 2.2vw, 1.26rem);
  color: var(--purple-soft);
}

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

.paper ul,
.paper ol {
  margin: 0 0 1.1em;
  padding-left: 1.25em;
}

.paper li { margin: 0.35em 0; }

.paper li::marker { color: var(--red-soft); }

.paper a {
  color: var(--red-soft);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.paper a:hover { color: #fff; }

.paper article {
  padding-bottom: 20px;
  margin-bottom: 20px;
  border-bottom: 1px dashed rgba(255, 255, 255, 0.16);
}

.paper article:last-child {
  border-bottom: 0;
  margin-bottom: 0;
  padding-bottom: 0;
}

.paper strong {
  color: #fff;
  font-weight: 700;
}

.paper code {
  padding: 1px 6px;
  border-radius: 7px;
  background: rgba(0, 0, 0, 0.32);
  border: 1px solid var(--line);
  font-size: 0.94em;
}

/* ---------- 侧栏 ---------- */
.side {
  grid-column: 2;
  position: sticky;
  top: calc(var(--head-h) + 14px);
  padding: 18px 18px 22px;
  border-radius: var(--r);
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.09);
  backdrop-filter: blur(15px);
  -webkit-backdrop-filter: blur(15px);
}

.side small {
  display: block;
  margin: 0 0 0.1rem;
  font-family: 'Caveat', sans-serif;
  font-size: 1.02rem;
  letter-spacing: 0.1em;
  color: var(--red-soft);
}

.side h2 {
  margin: 0 0 0.7rem;
  font-size: 1.1rem;
}

.side h3 {
  margin: 0.15rem 0 0.5rem;
  font-size: 1rem;
  color: var(--purple-soft);
}

.side p {
  margin: 0 0 1.15rem;
  font-size: 15.5px;
  color: var(--dim);
}

.jumps {
  margin: 0 0 1.2rem;
  padding: 0;
  list-style: none;
  border-top: 1px dashed rgba(255, 255, 255, 0.16);
}

.jumps li { border-bottom: 1px dashed rgba(255, 255, 255, 0.16); }

.jumps a {
  display: flex;
  align-items: center;
  min-height: 44px;
  padding: 8px 4px;
  text-decoration: none;
  font-size: 15.5px;
  color: var(--cream);
}

.jumps a:hover { color: var(--red-soft); }

/* ---------- 页脚 ---------- */
.foot {
  position: relative;
  z-index: 1;
  max-width: 1140px;
  margin: 0 auto;
  padding: clamp(24px, 4vw, 44px) clamp(14px, 4vw, 40px) 40px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 16px 28px;
  border-top: 1px solid var(--line);
}

.foot .cta {
  grid-column: 1 / -1;
  margin: 0;
  padding: 18px 22px;
  border-radius: var(--r);
  border: 1px solid rgba(255, 255, 255, 0.3);
  background: linear-gradient(105deg, rgba(255, 0, 0, 0.32), rgba(139, 0, 255, 0.3));
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  font-size: clamp(1.14rem, 2.9vw, 1.5rem);
  font-weight: 700;
  line-height: 1.5;
}

.foot .cta a {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  margin-left: 6px;
  color: #fff;
  text-decoration: underline;
  text-underline-offset: 4px;
}

.foot .fbrand {
  margin: 0;
  font-size: 15.5px;
  color: var(--dim);
}

.foot .flinks {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 8px;
  margin: 0;
  align-content: start;
}

.foot .flinks a {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.08);
  font-size: 15px;
  text-decoration: none;
}

.foot .flinks a:hover { border-color: var(--red-soft); }

.foot .copy,
.foot .note {
  grid-column: 1 / -1;
  display: block;
  text-align: center;
  color: var(--dim);
  font-size: 14px;
}

.foot .note { opacity: 0.8; }

/* ---------- 动效 ---------- */
.rv {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.62s ease, transform 0.62s ease;
}

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

/* ---------- 断点 ---------- */
@media (max-width: 900px) {
  :root { --head-h: 150px; }

  main {
    grid-template-columns: minmax(0, 1fr);
    gap: 16px;
  }

  .paper,
  .side { grid-column: 1; }

  .side {
    position: static;
    margin-top: 4px;
  }

  .brandtag { display: none; }
}

@media (max-width: 600px) {
  :root { --head-h: 146px; }

  body { font-size: 16.5px; }

  .ticker { font-size: 13px; }

  .menuhint { font-size: 13px; }

  .hero { min-height: 45vh; padding: 18px 16px; gap: 10px; }

  .hero h1 { font-size: clamp(1.7rem, 8.4vw, 2.2rem); }

  .btn { padding: 10px 16px; font-size: 15.5px; }

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

  .drawer > menu { padding: 20px 16px; align-content: start; padding-top: 96px; }

  .drawer > menu li a { min-height: 50px; font-size: 1rem; }
}

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

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

  .orb { transform: none !important; }

  .badge { transform: none; }
}

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