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

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

:root {
  --ink: #101014;
  --ink-2: #17171D;
  --lime: #E8FF3A;
  --red: #FF3B2E;
  --paper: #F3F3ED;
  --line: #2C2C34;
  --pad: 20px;
}

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

body {
  margin: 0;
  background: var(--ink);
  color: var(--paper);
  font-family: 'Space Grotesk', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', system-ui, sans-serif;
  font-size: 17px;
  line-height: 1.7;
  font-weight: 400;
  overflow-x: hidden;
}

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

a {
  color: var(--lime);
  text-decoration: none;
  transition: color 160ms ease, background-color 160ms ease, border-color 160ms ease;
}

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

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: 3px;
}

::selection { background: var(--lime); color: var(--ink); }

h1, h2, h3, h4 {
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.1;
  margin: 0;
}

/* ---------- 头部：公告条 + 品牌行 + 菜单行 ---------- */

.masthead {
  position: sticky;
  top: 0;
  z-index: 40;
  background: var(--ink);
  border-bottom: 2px solid var(--line);
}

.ticker {
  background: var(--lime);
  color: var(--ink);
  overflow: hidden;
  border-bottom: 2px solid var(--ink);
}

.ticker p {
  margin: 0;
  padding: 4px 0;
  white-space: nowrap;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.16em;
  animation: drift 24s linear infinite;
}

.ticker .dot { padding: 0 14px; color: var(--red); }

@keyframes drift {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

.brandrow {
  display: flex;
  align-items: center;
  padding: 12px var(--pad);
  border-bottom: 2px solid var(--line);
}

.logo {
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--paper);
  padding: 6px 0;
}

.logo:hover { color: var(--lime); }

.topnav p {
  display: flex;
  flex-wrap: wrap;
  gap: 2px 20px;
  margin: 0;
  padding: 8px var(--pad) 10px;
}

.topnav a {
  display: inline-block;
  padding: 12px 1px;
  font-size: 16px;
  font-weight: 500;
  color: var(--paper);
  border-bottom: 2px solid transparent;
}

.topnav a:hover {
  color: var(--lime);
  border-bottom-color: var(--red);
}

/* ---------- 首屏 ---------- */

.hero {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  min-height: 45vh;
  border-bottom: 3px solid var(--line);
  background: var(--ink);
}

.hero-visual {
  background: var(--lime);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  min-height: 240px;
}

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

.hero-visual .swatch {
  width: 46%;
  aspect-ratio: 1 / 1;
  background: var(--red);
  border-radius: 28px;
}

.hero-text {
  padding: 36px var(--pad);
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  justify-content: center;
  text-align: right;
  gap: 20px;
}

.hero-text h1 {
  font-size: clamp(2rem, 5.6vw, 4rem);
  letter-spacing: -0.035em;
  line-height: 1.02;
  max-width: 18ch;
}

.hero-cta {
  display: inline-block;
  padding: 13px 26px;
  background: var(--lime);
  color: var(--ink);
  font-weight: 700;
  font-size: 16px;
  border-radius: 28px;
  border: 2px solid var(--lime);
}

.hero-cta:hover {
  background: var(--red);
  border-color: var(--red);
  color: var(--ink);
}

/* ---------- 主体 ---------- */

.wrap {
  max-width: 1180px;
  margin: 0 auto;
  padding: 40px var(--pad) 8px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 244px;
  gap: 40px;
  align-items: start;
}

.col { min-width: 0; }

.prose { min-width: 0; }

.prose div[id] {
  scroll-margin-top: 150px;
  padding-top: 2px;
}

.prose div + div {
  margin-top: 46px;
  padding-top: 46px;
  border-top: 2px solid var(--line);
}

.prose h2 {
  font-size: clamp(1.5rem, 3.2vw, 2.1rem);
  color: var(--lime);
  margin: 0 0 0;
}

.prose h3 {
  font-size: 1.2rem;
  color: var(--paper);
  margin: 26px 0 0;
}

.prose h4 { font-size: 1.05rem; margin: 20px 0 0; }

hr {
  border: 0;
  border-top: 2px solid var(--red);
  width: 56px;
  margin: 10px 0 18px;
}

.prose p { margin: 0 0 18px; }

.prose p + h2,
.prose ul + h2,
.prose ol + h2 { margin-top: 34px; }

.prose ul,
.prose ol { margin: 0 0 18px; padding-left: 1.3em; }

.prose li { margin-bottom: 8px; }

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

.prose a {
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 2px;
}

.prose strong { color: var(--lime); font-weight: 700; }

.prose blockquote {
  margin: 20px 0;
  padding: 16px 20px;
  background: var(--ink-2);
  border-left: 4px solid var(--lime);
  border-radius: 0 28px 28px 0;
}

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

.prose img {
  border-radius: 28px;
  margin: 22px 0;
  width: 100%;
}

.prose table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0;
  font-size: 16px;
}

.prose th,
.prose td {
  border-bottom: 2px solid var(--line);
  padding: 10px 8px;
  text-align: left;
}

.prose th { color: var(--lime); }

.prose code {
  background: var(--ink-2);
  padding: 1px 5px;
  border-radius: 3px;
  font-size: 15px;
}

/* ---------- 侧栏 ---------- */

.side {
  position: sticky;
  top: 148px;
  background: var(--ink-2);
  border: 2px solid var(--lime);
  border-radius: 28px;
  padding: 18px 16px 12px;
}

.side h2 {
  font-size: 15px;
  letter-spacing: 0.22em;
  color: var(--lime);
}

.side hr {
  width: 100%;
  border-top-color: var(--line);
  margin: 10px 0 6px;
}

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

.side li a {
  display: block;
  padding: 11px 2px;
  color: var(--paper);
  font-size: 16px;
  border-bottom: 1px solid var(--line);
}

.side li:last-child a { border-bottom: 0; }

.side li a:hover {
  color: var(--lime);
  border-bottom-color: var(--red);
}

/* ---------- 页脚 ---------- */

.foot {
  margin-top: 64px;
  border-top: 3px solid var(--lime);
  background: var(--ink);
}

.cta {
  max-width: 1180px;
  margin: 0 auto;
  padding: 46px var(--pad) 40px;
  display: flex;
  flex-wrap: wrap;
  gap: 20px 28px;
  align-items: center;
  justify-content: space-between;
}

.cta-head h2 {
  font-size: clamp(1.7rem, 5vw, 2.8rem);
  color: var(--lime);
  letter-spacing: -0.03em;
}

.cta-btn {
  display: inline-block;
  padding: 13px 26px;
  border: 2px solid var(--red);
  border-radius: 28px;
  color: var(--red);
  font-weight: 700;
  font-size: 16px;
}

.cta-btn:hover {
  background: var(--red);
  color: var(--ink);
}

.fine {
  max-width: 1180px;
  margin: 0 auto;
  padding: 16px var(--pad) 34px;
  border-top: 2px solid var(--line);
  display: flex;
  flex-wrap: wrap;
  gap: 8px 24px;
  align-items: center;
  justify-content: space-between;
}

.fine p { margin: 0; }

.copy {
  font-size: 15px;
  letter-spacing: 0.04em;
  color: #9C9CA8;
}

.footlinks {
  display: flex;
  flex-wrap: wrap;
  gap: 2px 18px;
}

.footlinks a {
  display: inline-block;
  padding: 11px 0;
  font-size: 15px;
  color: var(--paper);
}

.footlinks a:hover { color: var(--lime); }

/* ---------- 断点 ---------- */

@media (max-width: 900px) {
  .wrap {
    grid-template-columns: minmax(0, 1fr);
    gap: 30px;
    padding-top: 26px;
  }

  .side {
    position: static;
    top: auto;
  }
}

@media (max-width: 860px) {
  .masthead { position: static; }

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

  .hero-visual {
    order: 2;
    min-height: 150px;
    border-top: 3px solid var(--line);
  }

  .hero-text {
    order: 1;
    padding: 24px var(--pad) 26px;
    gap: 16px;
  }

  .hero-text h1 { font-size: clamp(1.9rem, 8.4vw, 2.6rem); max-width: 100%; }

  .prose div[id] { scroll-margin-top: 20px; }

  .prose h2 { font-size: clamp(1.35rem, 5.6vw, 1.7rem); }

  .cta { padding: 36px var(--pad) 32px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .ticker p { animation: none; }
  * { transition-duration: 0.01ms !important; }
}

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