@import url('https://fonts.googleapis.com/css2?family=Cinzel:wght@400;500;600&family=Cormorant+Garamond:ital,wght@0,300;0,500;0,700;1,300;1,500&family=Crimson+Pro:ital,wght@0,300;0,400;0,600;1,300;1,400&display=swap');

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

:root {
  --ink: #000000;
  --paper: #ffffff;
  --soft: #f4f4f4;
  --line: #dcdcdc;
  --mute: #6a6a6a;
  --gap: 2rem;
  --pad: clamp(1.15rem, 4.5vw, 4.5rem);
  --serif: 'Cormorant Garamond', 'Songti SC', 'Noto Serif CJK SC', Georgia, serif;
  --sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
}

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.68;
  letter-spacing: .012em;
  overflow-x: hidden;
}

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

a { color: var(--ink); }

h1, h2, h3, h4 {
  font-family: var(--serif);
  font-weight: 500;
  letter-spacing: -.005em;
  line-height: 1.14;
  margin: 0 0 .6em;
}

h2 { font-size: clamp(1.55rem, 3.2vw, 2.3rem); }
h3 { font-size: clamp(1.2rem, 2.2vw, 1.5rem); }
p { margin: 0 0 1.05em; max-width: 66ch; }
p:last-child { margin-bottom: 0; }

small {
  display: block;
  font-family: var(--sans);
  font-size: .78rem;
  font-weight: 600;
  letter-spacing: .38em;
  text-transform: uppercase;
  color: var(--mute);
  margin-bottom: .5rem;
}

.skip {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--ink);
  color: var(--paper);
  padding: .8rem 1.2rem;
  z-index: 60;
  text-decoration: none;
}
.skip:focus { left: 0; }

/* ---------- 顶栏 ---------- */

.top {
  position: sticky;
  top: 0;
  z-index: 40;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: clamp(.5rem, 2vw, 1.6rem);
  padding: .55rem var(--pad);
  background: rgba(255, 255, 255, .94);
  border-bottom: 1px solid var(--ink);
}

.brand {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  background: var(--ink);
  color: var(--paper);
  text-decoration: none;
  overflow: hidden;
}

.brand .mark-glyph {
  font-family: var(--serif);
  font-size: 1.4rem;
  line-height: 1;
  color: var(--paper);
  transform: translateY(-1px);
}

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

.mainnav {
  display: flex;
  align-items: center;
  gap: .1rem;
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
}
.mainnav::-webkit-scrollbar { display: none; }

.mainnav a {
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  min-height: 44px;
  padding: .55rem .7rem;
  font-size: 16px;
  white-space: nowrap;
  text-decoration: none;
  color: var(--ink);
  transition: background .2s ease, color .2s ease;
}

.mainnav a i {
  width: 6px;
  height: 6px;
  background: var(--ink);
  display: inline-block;
  transition: background .2s ease;
}

.mainnav a:hover,
.mainnav a:focus-visible {
  background: var(--ink);
  color: var(--paper);
}
.mainnav a:hover i,
.mainnav a:focus-visible i { background: var(--paper); }

.contact {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  min-height: 44px;
  padding: .55rem .95rem;
  border: 1px solid var(--ink);
  font-size: 16px;
  text-decoration: none;
  color: var(--ink);
  transition: background .2s ease, color .2s ease;
}
.contact:hover,
.contact:focus-visible { background: var(--ink); color: var(--paper); }

/* ---------- 首屏 ---------- */

.hero {
  position: relative;
  min-height: 100svh;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  align-items: end;
  gap: clamp(1.5rem, 4vw, 3.5rem);
  padding: clamp(1.5rem, 5vw, 3.5rem) var(--pad) clamp(3rem, 8vw, 6rem);
  border-bottom: 1px solid var(--ink);
  overflow: hidden;
}

.hero-fig {
  position: relative;
  margin: 0;
  align-self: stretch;
  min-height: 44vh;
  background: var(--soft);
  border-radius: 10px;
  overflow: hidden;
}

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

.hero-mark { position: absolute; inset: 0; display: block; }
.hero-mark::before {
  content: '';
  position: absolute;
  left: 11%;
  top: 13%;
  width: 54%;
  aspect-ratio: 1;
  border: 2px solid var(--ink);
}
.hero-mark::after {
  content: '';
  position: absolute;
  right: 10%;
  bottom: 12%;
  width: 33%;
  aspect-ratio: 1;
  background: var(--ink);
}

.hero-txt {
  text-align: right;
  padding-bottom: .5rem;
}

.kick {
  margin: 0 0 1rem;
  font-size: .8rem;
  letter-spacing: .4em;
  color: var(--mute);
}

.hero h1 {
  font-size: clamp(2.3rem, 7.5vw, 5.4rem);
  line-height: 1.02;
  margin: 0 0 .9rem;
  letter-spacing: -.02em;
}

.lede {
  margin: 0 0 0 auto;
  max-width: 34ch;
  font-size: 1.05rem;
  color: #1a1a1a;
}

.band {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 10px;
  background: var(--ink);
  transform: skewY(-1.2deg);
  transform-origin: left bottom;
}

/* ---------- 主区 ---------- */

.sheet {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 15rem) minmax(0, 1fr);
  align-items: start;
  gap: clamp(2rem, 6vw, 4.5rem);
  padding: clamp(2.5rem, 7vw, 5.5rem) var(--pad) clamp(3rem, 8vw, 5rem);
}

.rail {
  position: sticky;
  top: 5.5rem;
  border-top: 2px solid var(--ink);
  padding-top: 1rem;
}

.rail h2 {
  font-family: var(--sans);
  font-size: 1.02rem;
  letter-spacing: .32em;
  font-weight: 600;
  margin: 0 0 1rem;
}

.rail small { margin-bottom: .3rem; }

.rail ol {
  list-style: none;
  margin: 0;
  padding: 0;
}

.rail li a {
  display: flex;
  align-items: center;
  gap: .7rem;
  min-height: 44px;
  padding: .5rem 0;
  border-bottom: 1px solid var(--line);
  font-size: 16px;
  text-decoration: none;
  transition: padding .2s ease, border-color .2s ease;
}

.rail li a em {
  font-family: var(--serif);
  font-style: normal;
  font-size: .92rem;
  color: var(--mute);
  letter-spacing: .06em;
}

.rail li a:hover,
.rail li a:focus-visible {
  padding-left: .45rem;
  border-color: var(--ink);
}

.stream { min-width: 0; }

.stream > article {
  background: var(--soft);
  border-radius: 10px;
  padding: clamp(1.4rem, 3.6vw, 2.6rem);
  margin-bottom: var(--gap);
  scroll-margin-top: 6rem;
}

.stream > article > h2:first-child,
.stream > article > small:first-child + h2 { margin-top: 0; }

.stream h2 { margin-top: 0; }

.stream h3 { margin-top: 1.6em; }

.stream ul, .stream ol { padding-left: 1.2em; margin: 0 0 1.05em; }
.stream li { margin-bottom: .4em; }

.stream a { text-decoration: underline; text-underline-offset: 3px; }
.stream a:hover { background: var(--ink); color: var(--paper); text-decoration: none; }

.stream figure { margin: 1.4rem 0; }
.stream figure img { border-radius: 10px; }
.stream blockquote {
  margin: 1.4rem 0;
  padding-left: 1.1rem;
  border-left: 2px solid var(--ink);
  font-family: var(--serif);
  font-size: 1.18rem;
}
.stream table { width: 100%; border-collapse: collapse; margin: 1.2rem 0; }
.stream th, .stream td { border-bottom: 1px solid var(--line); padding: .6rem .4rem; text-align: left; }

/* ---------- 页脚 ---------- */

.foot {
  border-top: 1px solid var(--ink);
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr) auto;
  gap: clamp(1.5rem, 4vw, 3rem);
  align-items: start;
  padding: clamp(2rem, 5vw, 3.2rem) var(--pad);
}

.f-nav dl {
  margin: 0;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: .05rem 1.1rem;
}

.f-nav dt a {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  font-size: 16px;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color .2s ease;
}
.f-nav dt a:hover,
.f-nav dt a:focus-visible { border-color: var(--ink); }

.f-nav dd {
  margin: 0;
  display: flex;
  align-items: center;
  font-family: var(--serif);
  font-size: .92rem;
  color: var(--mute);
  letter-spacing: .1em;
}

.f-brand { display: flex; flex-direction: column; gap: 1rem; }

.f-brand .mark {
  width: 42px;
  height: 42px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--ink);
  font-family: var(--serif);
  font-size: 1.3rem;
  line-height: 1;
}

.copy {
  margin: 0;
  font-size: .92rem;
  letter-spacing: .16em;
  color: var(--mute);
}

.totop {
  font-family: var(--sans);
  font-size: 16px;
  min-height: 44px;
  padding: .6rem 1.1rem;
  background: var(--paper);
  color: var(--ink);
  border: 1px solid var(--ink);
  cursor: pointer;
  transition: background .2s ease, color .2s ease;
}
.totop:hover,
.totop:focus-visible { background: var(--ink); color: var(--paper); }

/* ---------- 滚动显现 ---------- */

.js .stream > article {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity .7s ease, transform .7s ease;
}
.js .stream > article.in {
  opacity: 1;
  transform: none;
}

/* ---------- 断点 ---------- */

@media (max-width: 900px) {
  .top {
    grid-template-columns: auto minmax(0, 1fr) auto;
    grid-template-areas:
      'brand . contact'
      'nav nav nav';
    padding-bottom: .4rem;
    row-gap: .3rem;
  }
  .brand { grid-area: brand; }
  .contact { grid-area: contact; }
  .mainnav { grid-area: nav; border-top: 1px solid var(--line); }

  .hero {
    grid-template-columns: minmax(0, 1fr);
    align-items: start;
    padding-top: 1.6rem;
  }
  .hero-txt { order: -1; text-align: left; }
  .lede { margin-left: 0; max-width: none; }
  .hero-fig { min-height: 38vh; }

  .sheet { grid-template-columns: minmax(0, 1fr); }
  .rail { position: static; top: auto; }

  .foot { grid-template-columns: minmax(0, 1fr); }
  .foot dl { grid-template-columns: auto auto; justify-content: start; }
}

@media (max-width: 420px) {
  body { font-size: 16.5px; }
  .mainnav a { padding: .5rem .55rem; }
  .hero h1 { font-size: clamp(2rem, 11vw, 3rem); }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .js .stream > article { opacity: 1; transform: none; transition: none; }
  .mainnav a, .contact, .totop, .rail li a, .f-nav dt a { transition: none; }
}

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