@import url('https://fonts.googleapis.com/css2?family=Figtree:wght@300;400;500;600;700;900&family=Noto+Sans:wght@300;400;500;700;900&display=swap');

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

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

body {
  margin: 0;
  padding-bottom: 5.75rem;
  font-family: 'Figtree', 'Noto Sans', system-ui, -apple-system, 'Segoe UI', sans-serif;
  font-size: 1.0625rem;
  line-height: 1.65;
  font-weight: 400;
  color: #000;
  background: #fff;
  overflow-x: hidden;
}

body.menu-open { overflow: hidden; }

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

a { color: #000; }

:focus-visible {
  outline: 3px solid #000;
  outline-offset: 3px;
}

/* ---------- 底部固定条 ---------- */
.bar {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 70;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.55rem clamp(1rem, 4vw, 2.5rem);
  background: #fff;
  border-top: 2px solid #000;
}

.bar-brand {
  display: flex;
  align-items: center;
  min-height: 48px;
  font-size: 1.0625rem;
  font-weight: 900;
  letter-spacing: -0.04em;
  text-decoration: none;
}

.bar-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  min-height: 48px;
  padding: 0.5rem 1.15rem;
  border: 0;
  border-radius: 999px;
  background: #000;
  color: #fff;
  font: inherit;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
}

.bar-lines {
  display: block;
  width: 18px;
  height: 10px;
  border-top: 2px solid #fff;
  border-bottom: 2px solid #fff;
}

/* ---------- 全屏遮罩菜单 ---------- */
.menu {
  position: fixed;
  inset: 0;
  z-index: 60;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: clamp(3rem, 12vh, 7rem) clamp(1.25rem, 5vw, 4rem) 7rem;
  overflow-y: auto;
  background: #000;
  color: #fff;
}

.menu[hidden] { display: none; }

.menu-list {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: m;
}

.menu-list li {
  counter-increment: m;
  border-bottom: 1px solid #3a3a3a;
  animation: slide-in 0.42s both;
}

.menu-list li:nth-child(1) { animation-delay: 0.02s; }
.menu-list li:nth-child(2) { animation-delay: 0.06s; }
.menu-list li:nth-child(3) { animation-delay: 0.1s; }
.menu-list li:nth-child(4) { animation-delay: 0.14s; }
.menu-list li:nth-child(5) { animation-delay: 0.18s; }
.menu-list li:nth-child(6) { animation-delay: 0.22s; }
.menu-list li:nth-child(7) { animation-delay: 0.26s; }

@keyframes slide-in {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: none; }
}

.menu-list a {
  display: flex;
  align-items: center;
  gap: 1rem;
  min-height: 58px;
  padding: 0.45rem 0;
  color: #fff;
  text-decoration: none;
  font-size: clamp(1.4rem, 4.6vw, 2.5rem);
  font-weight: 900;
  letter-spacing: -0.04em;
  line-height: 1.1;
}

.menu-list a::before {
  content: counter(m, decimal-leading-zero);
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  opacity: 0.55;
  font-variant-numeric: tabular-nums;
}

.menu-list a:hover { text-decoration: underline; text-underline-offset: 0.28em; }
.menu :focus-visible { outline-color: #fff; }

/* ---------- 主体框架 ---------- */
.shell {
  display: grid;
  grid-template-columns: 15rem minmax(0, 1fr);
  gap: clamp(1.5rem, 5vw, 5rem);
  max-width: 1400px;
  margin: 0 auto;
  padding: clamp(2rem, 6vw, 5rem) clamp(1.15rem, 4vw, 4rem) clamp(3rem, 8vw, 7rem);
}

.rail {
  position: sticky;
  top: 1.5rem;
  align-self: start;
}

.rail-title {
  margin: 0 0 0.5rem;
  font-size: clamp(1.3rem, 2.2vw, 1.75rem);
  font-weight: 900;
  letter-spacing: -0.04em;
  line-height: 1.15;
}

.rail .subtitle {
  margin: 0 0 1.75rem;
  font-size: 1rem;
  line-height: 1.5;
  color: #2e2e2e;
  display: -webkit-box;
  -webkit-line-clamp: 4;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.rail-list {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: r;
  border-top: 2px solid #000;
}

.rail-list li { counter-increment: r; border-bottom: 1px solid #000; }

.rail-list a {
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
  min-height: 44px;
  padding: 0.4rem 0;
  font-size: 1rem;
  font-weight: 600;
  text-decoration: none;
  color: #000;
}

.rail-list a::before {
  content: counter(r, decimal-leading-zero);
  font-size: 0.75rem;
  font-weight: 400;
  letter-spacing: 0.1em;
  opacity: 0.6;
  font-variant-numeric: tabular-nums;
}

.rail-list a:hover { background: #000; color: #fff; }

main { min-width: 0; }

/* ---------- 首屏 ---------- */
.hero {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  min-height: 70vh;
  padding: clamp(2rem, 6vw, 4rem) 0 clamp(1.5rem, 4vw, 3rem);
  border-bottom: 8px solid #000;
  overflow: hidden;
}

.hero-ghost {
  position: absolute;
  right: 0;
  top: 4%;
  z-index: 0;
  font-size: clamp(3rem, 13vw, 12rem);
  font-weight: 900;
  letter-spacing: -0.05em;
  line-height: 0.78;
  white-space: nowrap;
  opacity: 0.09;
  pointer-events: none;
  will-change: transform;
}

.hero-mosaic {
  position: absolute;
  left: 0;
  top: 6%;
  z-index: 1;
  width: min(46%, 420px);
}

.ph {
  margin: 0;
  border-radius: 18px;
  overflow: hidden;
  border-bottom: 8px solid #000;
  background: #fff;
}

.ph img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  aspect-ratio: 4 / 5;
}

.ph-b {
  position: absolute;
  left: 36%;
  top: 36%;
  width: 70%;
}

.ph-b img { aspect-ratio: 1 / 1; }

.hero-copy {
  position: relative;
  z-index: 2;
  text-align: right;
  margin-top: auto;
}

.hero h1 {
  margin: 0 0 0 auto;
  max-width: 14ch;
  font-size: clamp(2.2rem, 6.4vw, 5.5rem);
  font-weight: 900;
  letter-spacing: -0.05em;
  line-height: 0.95;
}

/* ---------- 正文章节 ---------- */
article > section {
  margin-top: clamp(2.5rem, 7vw, 6rem);
  padding: clamp(1.5rem, 4vw, 3.5rem);
  background: #fff;
  border: 1px solid #000;
  border-bottom-width: 8px;
  border-radius: 18px;
  scroll-margin-top: 1.5rem;
  scroll-margin-bottom: 6.5rem;
}

article > section:nth-of-type(even) {
  background: #000;
  color: #fff;
}

article > section > :first-child { margin-top: 0; }
article > section > :last-child { margin-bottom: 0; }

article h2 {
  margin: 0 0 0.75rem;
  font-size: clamp(1.6rem, 4vw, 2.75rem);
  font-weight: 900;
  letter-spacing: -0.04em;
  line-height: 1.1;
}

article h3 {
  margin: 2rem 0 0.5rem;
  font-size: clamp(1.2rem, 2.4vw, 1.6rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.25;
}

article p { margin: 0 0 1rem; max-width: 64ch; }
article ul, article ol { margin: 0 0 1rem; padding-left: 1.3rem; }
article li { margin: 0.35rem 0; }

article a { color: inherit; text-underline-offset: 0.2em; }

article img {
  border-radius: 18px;
  margin: 1.5rem 0;
  border-bottom: 6px solid currentColor;
}

article blockquote {
  margin: 1.5rem 0;
  padding-left: 1rem;
  border-left: 8px solid currentColor;
  font-size: 1.05rem;
}

article time {
  display: inline-block;
  font-size: 1rem;
  letter-spacing: 0.02em;
  opacity: 0.75;
}

article table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  font-size: 1rem;
}

article th, article td {
  padding: 0.6rem 0.5rem;
  border-bottom: 1px solid currentColor;
  text-align: left;
  vertical-align: top;
}

/* ---------- 页脚 ---------- */
.foot {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  justify-content: space-between;
  gap: clamp(1.25rem, 4vw, 3rem);
  padding: clamp(1.75rem, 5vw, 3.5rem) clamp(1.15rem, 4vw, 4rem);
  border-top: 8px solid #000;
  background: #fff;
}

.foot-brand { max-width: 16rem; }

.foot-name {
  margin: 0 0 0.35rem;
  font-size: 1.1rem;
  font-weight: 900;
  letter-spacing: -0.04em;
}

.foot-desc {
  margin: 0;
  font-size: 1rem;
  line-height: 1.5;
  color: #2e2e2e;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.foot-nav dl {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.4rem 1.75rem;
  margin: 0;
}

.foot-nav dt { font-size: 1rem; font-weight: 700; }

.foot-nav dd {
  margin: 0;
  font-size: 1rem;
  line-height: 1.35;
  color: #3a3a3a;
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.foot-nav a {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  text-decoration: none;
}

.foot-nav a:hover { text-decoration: underline; text-underline-offset: 0.2em; }

.foot-form { display: flex; flex-wrap: wrap; gap: 0.5rem; }

.foot-form input {
  min-height: 48px;
  min-width: 11rem;
  padding: 0.5rem 1rem;
  border: 2px solid #000;
  border-radius: 999px;
  background: #fff;
  color: #000;
  font: inherit;
  font-size: 1rem;
}

.foot-form button {
  min-height: 48px;
  padding: 0.5rem 1.35rem;
  border: 0;
  border-radius: 999px;
  background: #000;
  color: #fff;
  font: inherit;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
}

.foot-legal {
  display: flex;
  align-items: center;
  min-height: 40px;
  font-size: 1rem;
  letter-spacing: 0.02em;
}

/* ---------- 断点 ---------- */
@media (max-width: 1000px) {
  .shell {
    grid-template-columns: minmax(0, 1fr);
    gap: 2rem;
  }

  .rail {
    position: static;
    padding-bottom: 1.25rem;
    border-bottom: 2px solid #000;
  }

  .rail .subtitle { margin-bottom: 0; }

  .rail-list { display: none; }
}

@media (max-width: 760px) {
  body { padding-bottom: 5.5rem; }

  .hero {
    min-height: auto;
    padding-top: 0.75rem;
  }

  .hero-ghost {
    top: 0;
    font-size: clamp(2.4rem, 15vw, 4.5rem);
    opacity: 0.1;
  }

  .hero-copy {
    order: -1;
    text-align: left;
    margin: 0 0 1.75rem;
  }

  .hero h1 {
    margin-left: 0;
    max-width: none;
    font-size: clamp(2rem, 9vw, 3rem);
  }

  .hero-mosaic {
    position: static;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    width: 100%;
    margin-bottom: 1.75rem;
  }

  .ph-b {
    position: static;
    width: auto;
    transform: translateY(1.5rem);
  }

  .foot { flex-direction: column; }
  .foot-nav dl { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .foot-form { width: 100%; }
  .foot-form input { flex: 1 1 10rem; }
}

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

  .menu-list li { animation: none; }

  .hero-ghost { transform: none !important; }

  *, *::before, *::after { transition: none !important; }
}
</｜DSML｜ parameter>
</｜DSML｜ invoke>

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