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

:root {
  --red: #ff0000;
  --violet: #8b00ff;
  --ink: #261717;
  --tx: #f5eaea;
  --dim: #c9b2b2;
  --glass: rgba(255, 255, 255, 0.08);
  --glass-hi: rgba(255, 255, 255, 0.16);
  --line: rgba(255, 255, 255, 0.16);
  --r: 18px;
  --blur: blur(16px);
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--ink);
  color: var(--tx);
  font-family: "Noto Sans SC", system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 17px;
  line-height: 1.75;
  font-weight: 400;
  overflow-x: hidden;
  min-height: 100vh;
}

body.lock { overflow: hidden; }

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

a { color: inherit; }

h1, h2, h3 { line-height: 1.3; margin: 0 0 .6em; font-weight: 700; }

small {
  display: block;
  font-size: .9rem;
  line-height: 1.5;
  letter-spacing: .16em;
  color: #ff9a9a;
  font-weight: 500;
  margin-bottom: .4em;
}

small + h2, small + h3 { margin-top: 0; }

/* ---------- 背景光斑 ---------- */
.glow {
  position: fixed;
  border-radius: 50%;
  pointer-events: none;
  z-index: 0;
  filter: blur(90px);
  opacity: .5;
}

.g1 { width: 52vw; height: 52vw; left: -14vw; top: -12vw; background: radial-gradient(circle at 50% 50%, rgba(255, 0, 0, .85), rgba(255, 0, 0, 0) 70%); }
.g2 { width: 46vw; height: 46vw; right: -12vw; top: 26vh; background: radial-gradient(circle at 50% 50%, rgba(139, 0, 255, .85), rgba(139, 0, 255, 0) 70%); }
.g3 { width: 40vw; height: 40vw; left: 30vw; bottom: -18vw; background: radial-gradient(circle at 50% 50%, rgba(255, 0, 0, .5), rgba(139, 0, 255, 0) 72%); opacity: .35; }

/* ---------- 顶栏 ---------- */
.topbar {
  position: sticky;
  top: 0;
  z-index: 40;
}

.bar {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 18px;
  background: rgba(38, 23, 23, .62);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  border-bottom: 1px solid var(--line);
}

.brand {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 44px;
  min-height: 44px;
  border-radius: 14px;
  text-decoration: none;
  overflow: hidden;
}

.mark {
  width: 34px;
  height: 34px;
  border-radius: 11px;
  background: linear-gradient(140deg, var(--red), var(--violet));
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .5), 0 6px 18px rgba(255, 0, 0, .35);
}

.mark-img { width: 34px; height: 34px; border-radius: 11px; object-fit: cover; }

.call {
  margin-left: auto;
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 18px;
  border-radius: 999px;
  text-decoration: none;
  font-size: .98rem;
  color: #fff;
  background: linear-gradient(135deg, rgba(255, 0, 0, .9), rgba(139, 0, 255, .9));
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .4), 0 6px 18px rgba(139, 0, 255, .3);
}

.burger {
  min-width: 44px;
  min-height: 44px;
  padding: 0 14px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--glass);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  color: var(--tx);
  font: inherit;
  font-size: .98rem;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
}

.burger:hover { background: var(--glass-hi); }

/* ---------- 锚点条 ---------- */
.rail {
  background: rgba(38, 23, 23, .5);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255, 255, 255, .1);
}

.rail-list {
  display: flex;
  gap: 4px;
  list-style: none;
  margin: 0;
  padding: 6px 12px;
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
}

.rail-list::-webkit-scrollbar { display: none; }

.rail-list a {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  padding: 0 13px;
  white-space: nowrap;
  text-decoration: none;
  font-size: .95rem;
  color: var(--dim);
  border-radius: 999px;
  border: 1px solid transparent;
}

.rail-list a:hover,
.rail-list a.act {
  color: #fff;
  background: rgba(255, 0, 0, .18);
  border-color: rgba(255, 0, 0, .55);
}

/* ---------- 全屏菜单 ---------- */
.drawer {
  position: fixed;
  inset: 0;
  z-index: 60;
  padding: 18px 20px 40px;
  overflow-y: auto;
  background: rgba(38, 23, 23, .92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: opacity .28s ease, transform .28s ease, visibility .28s;
}

.drawer.on {
  opacity: 1;
  visibility: visible;
  transform: none;
}

.drawer-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
}

.drawer-brand { font-size: 1.05rem; letter-spacing: .06em; color: var(--dim); }

.xbtn {
  min-height: 44px;
  padding: 0 18px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--glass);
  color: var(--tx);
  font: inherit;
  font-size: .98rem;
  cursor: pointer;
}

.drawer-nav { margin-top: 10px; }

.drawer-nav ul { list-style: none; margin: 0; padding: 0; }

.drawer-nav li { border-bottom: 1px solid rgba(255, 255, 255, .1); }

.dlink {
  display: flex;
  align-items: center;
  min-height: 56px;
  padding: 8px 4px;
  text-decoration: none;
  font-size: 1.15rem;
  font-weight: 500;
  color: var(--tx);
}

.dlink:hover { color: #fff; padding-left: 10px; transition: padding .2s; }

/* ---------- 主体 ---------- */
main {
  position: relative;
  z-index: 1;
  display: block;
}

article[id] { scroll-margin-top: 130px; }

.hero {
  display: grid;
  grid-template-columns: .92fr 1.08fr;
  gap: 40px;
  align-items: center;
  max-width: 1160px;
  margin: 0 auto;
  padding: 56px 22px 40px;
  min-height: 70vh;
}

.hero-fig {
  position: relative;
  margin: 0;
  border-radius: var(--r);
  overflow: hidden;
  min-height: 280px;
  background: linear-gradient(150deg, rgba(255, 0, 0, .35), rgba(139, 0, 255, .32));
  border: 1px solid rgba(255, 255, 255, .2);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  box-shadow: 0 30px 70px rgba(0, 0, 0, .45);
  animation: floaty 9s ease-in-out infinite;
}

.hero-img { width: 100%; height: 100%; object-fit: cover; }

.badge {
  position: absolute;
  left: 14px;
  bottom: 14px;
  max-width: calc(100% - 28px);
  padding: 7px 14px;
  border-radius: 999px;
  font-size: .9rem;
  line-height: 1.4;
  color: #fff;
  background: rgba(255, 255, 255, .18);
  border: 1px solid rgba(255, 255, 255, .35);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.hero-copy { text-align: right; }

.hero-copy h1 {
  font-size: clamp(1.85rem, 5vw, 3.2rem);
  letter-spacing: -.01em;
  margin-bottom: .45em;
  background: linear-gradient(120deg, #fff 30%, #ffb3b3 65%, #d5b3ff);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.lede {
  margin: 0 0 26px;
  color: var(--dim);
  font-weight: 300;
  font-size: 1.02rem;
  line-height: 1.8;
}

.hero-cta {
  display: inline-flex;
  align-items: center;
  min-height: 46px;
  padding: 0 26px;
  border-radius: 999px;
  text-decoration: none;
  font-size: 1rem;
  color: #fff;
  background: linear-gradient(135deg, var(--red), var(--violet));
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .45), 0 10px 28px rgba(139, 0, 255, .32);
}

@keyframes floaty {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

/* ---------- 内容网格 ---------- */
.grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 268px;
  gap: 44px;
  align-items: start;
  max-width: 1160px;
  margin: 0 auto;
  padding: 30px 22px 70px;
}

.prose {
  min-width: 0;
  padding: 30px 28px;
  border-radius: var(--r);
  background: var(--glass);
  border: 1px solid var(--line);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  box-shadow: 0 24px 60px rgba(0, 0, 0, .35);
  overflow-wrap: break-word;
}

.prose > article + article {
  margin-top: 40px;
  padding-top: 40px;
  border-top: 1px solid rgba(255, 255, 255, .1);
}

.prose h2 { font-size: 1.5rem; margin: 0 0 .7em; color: #fff; }

.prose h3 { font-size: 1.18rem; margin: 1.4em 0 .5em; color: #ffe0e0; }

.prose p { margin: 0 0 1.1em; line-height: 1.85; font-weight: 300; }

.prose ul, .prose ol { margin: 0 0 1.2em; padding-left: 1.3em; }

.prose li { margin-bottom: .5em; line-height: 1.8; }

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

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

.prose a { color: #ffb0b0; text-decoration: underline; text-underline-offset: 3px; }

.prose blockquote {
  margin: 0 0 1.2em;
  padding: 14px 18px;
  border-left: 3px solid var(--violet);
  border-radius: 0 12px 12px 0;
  background: rgba(139, 0, 255, .14);
  color: #f0e0ff;
}

.prose figure { margin: 0 0 1.2em; }

.prose img { border-radius: 14px; }

/* ---------- 侧栏 ---------- */
.side {
  position: sticky;
  top: 132px;
  padding: 22px 20px;
  border-radius: var(--r);
  background: rgba(255, 255, 255, .07);
  border: 1px solid var(--line);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  box-shadow: 0 20px 50px rgba(0, 0, 0, .3);
}

.side h2 { font-size: 1.14rem; margin-bottom: .8em; }

.side-nav ul { list-style: none; margin: 0; padding: 0; }

.side-nav li + li { border-top: 1px solid rgba(255, 255, 255, .1); }

.slink {
  display: flex;
  align-items: center;
  min-height: 42px;
  padding: 6px 0;
  font-size: .96rem;
  text-decoration: none;
  color: var(--dim);
  line-height: 1.4;
}

.slink:hover { color: #fff; }

/* ---------- 页脚 ---------- */
.foot {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 18px 30px;
  max-width: 1160px;
  margin: 0 auto;
  padding: 20px 22px 60px;
}

.fcta {
  grid-column: 1 / -1;
  padding: 44px 30px;
  border-radius: 24px;
  text-align: center;
  background: linear-gradient(135deg, rgba(255, 0, 0, .3), rgba(139, 0, 255, .3));
  border: 1px solid rgba(255, 255, 255, .22);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .35), 0 24px 60px rgba(0, 0, 0, .4);
}

.fcta h2 {
  font-size: clamp(1.4rem, 4vw, 2rem);
  color: #fff;
  margin-bottom: .7em;
}

.fbtn {
  display: inline-flex;
  align-items: center;
  min-height: 46px;
  padding: 0 28px;
  border-radius: 999px;
  text-decoration: none;
  color: #261717;
  background: #fff;
  font-weight: 700;
  box-shadow: 0 10px 26px rgba(255, 255, 255, .22);
}

.fnav { min-width: 0; }

.fnav ul {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 0;
  list-style: none;
  margin: 0;
  padding: 0;
}

.flink {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 14px 0 0;
  text-decoration: none;
  font-size: .95rem;
  color: var(--dim);
}

.flink:hover { color: #fff; }

.flegal {
  display: flex;
  align-items: center;
  justify-content: flex-end;
}

.flegal p { margin: 0; font-size: .95rem; color: #a89292; }

/* ---------- 回到顶部 ---------- */
.top {
  position: fixed;
  right: 16px;
  bottom: 18px;
  z-index: 45;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 16px;
  border-radius: 999px;
  text-decoration: none;
  font-size: .95rem;
  color: var(--tx);
  background: rgba(38, 23, 23, .7);
  border: 1px solid var(--line);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
}

.top:hover { background: rgba(255, 0, 0, .35); }

/* ---------- 滚动显现 ---------- */
.rv { opacity: 0; transform: translateY(18px); transition: opacity .6s ease, transform .6s ease; }

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

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .rv { opacity: 1; transform: none; transition: none; }
  .hero-fig { animation: none; }
  .drawer { transition: none; }
}

/* ---------- 移动端 ---------- */
@media (max-width: 900px) {
  .hero {
    grid-template-columns: 1fr;
    gap: 26px;
    min-height: 0;
    padding: 30px 18px 26px;
  }

  .hero-copy { order: 1; text-align: right; }

  .hero-fig { order: 2; min-height: 200px; }

  .grid {
    grid-template-columns: 1fr;
    gap: 28px;
    padding: 18px 18px 56px;
  }

  .prose { padding: 24px 18px; }

  .side { position: static; }

  .foot {
    grid-template-columns: 1fr;
    padding: 16px 18px 80px;
  }

  .flegal { justify-content: flex-start; }

  .fcta { padding: 34px 20px; }

  .rail-list a { font-size: .92rem; }
}

@media (max-width: 420px) {
  body { font-size: 16px; }
  .bar { padding: 8px 12px; }
  .call { padding: 0 14px; }
}

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