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

:root {
  --ink: #171f26;
  --ink-up: #1d2731;
  --ink-dn: #131a20;
  --ice: #c8e0f4;
  --rose: #f5e0e8;
  --txt: #d9e6f0;
  --dim: #93a8b8;
  --line: rgba(200, 224, 244, 0.13);
  --sh-d: 6px 6px 16px rgba(0, 0, 0, 0.58);
  --sh-l: -6px -6px 16px rgba(200, 224, 244, 0.07);
  --card: 4px;
  --pill: 14px;
  --disp: 'Space Grotesk', 'DM Sans', 'PingFang SC', 'Noto Sans SC', 'Microsoft YaHei', system-ui, sans-serif;
  --sans: 'DM Sans', 'Space Grotesk', 'PingFang SC', 'Noto Sans SC', 'Microsoft YaHei', system-ui, sans-serif;
}

* { box-sizing: border-box; }

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

html.lock { overflow: hidden; }

body {
  margin: 0;
  background-color: var(--ink);
  background-image:
    radial-gradient(62vw 62vw at 6% -12%, rgba(200, 224, 244, 0.11), transparent 62%),
    radial-gradient(58vw 58vw at 108% 18%, rgba(245, 224, 232, 0.09), transparent 60%),
    radial-gradient(70vw 45vw at 50% 118%, rgba(200, 224, 244, 0.05), transparent 70%);
  background-attachment: fixed;
  color: var(--txt);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.75;
}

a { color: inherit; }

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

[id] { scroll-margin-top: 124px; }

.top {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(23, 31, 38, 0.9);
  border-bottom: 1px solid var(--line);
  padding: 10px 20px 12px;
  backdrop-filter: blur(16px);
}

.brandrow {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding-bottom: 10px;
}

.brand {
  font-family: var(--disp);
  font-weight: 700;
  font-size: 21px;
  letter-spacing: 0.01em;
  color: var(--ice);
  text-decoration: none;
  padding: 8px 2px;
  min-height: 40px;
  display: inline-flex;
  align-items: center;
}

.burger {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  min-height: 44px;
  padding: 10px 16px;
  border-radius: var(--pill);
  border: 1px solid rgba(200, 224, 244, 0.08);
  background: linear-gradient(145deg, var(--ink-up), var(--ink-dn));
  box-shadow: var(--sh-d), var(--sh-l);
  color: var(--ice);
  font: inherit;
  font-size: 16px;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.burger:active {
  transform: scale(0.97);
  box-shadow: inset 3px 3px 9px rgba(0, 0, 0, 0.62), inset -3px -3px 9px rgba(200, 224, 244, 0.06);
}

.bars { display: grid; gap: 4px; }

.bars i {
  display: block;
  width: 18px;
  height: 2px;
  border-radius: 2px;
  background: var(--ice);
}

.toolrow { display: flex; gap: 10px; }

.srch { display: flex; flex: 1; }

.srch input {
  width: 100%;
  min-height: 44px;
  padding: 0 16px;
  font: inherit;
  font-size: 16px;
  color: var(--txt);
  border-radius: var(--pill);
  border: 1px solid rgba(200, 224, 244, 0.07);
  background: #141c22;
  box-shadow: inset 3px 3px 9px rgba(0, 0, 0, 0.6), inset -3px -3px 9px rgba(200, 224, 244, 0.05);
}

.srch input::placeholder { color: var(--dim); }

.srch input:focus {
  outline: 2px solid rgba(200, 224, 244, 0.55);
  outline-offset: 1px;
}

.drawer {
  position: fixed;
  inset: 0;
  z-index: 60;
  display: grid;
  place-content: center;
  padding: 24px;
  background: rgba(19, 26, 32, 0.97);
  backdrop-filter: blur(20px);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.25s ease, visibility 0.25s ease;
}

.drawer.on { opacity: 1; visibility: visible; }

.drawer-nav {
  display: grid;
  gap: 8px;
  width: min(86vw, 430px);
}

.drawer-nav a {
  display: flex;
  align-items: center;
  min-height: 52px;
  padding: 14px 22px;
  font-family: var(--disp);
  font-size: 20px;
  text-decoration: none;
  border-radius: var(--pill);
  color: var(--txt);
  background: linear-gradient(145deg, var(--ink-up), var(--ink-dn));
  box-shadow: 5px 5px 14px rgba(0, 0, 0, 0.55), -5px -5px 14px rgba(200, 224, 244, 0.06);
  transition: color 0.15s ease, transform 0.15s ease;
}

.drawer-nav a:hover,
.drawer-nav a:focus-visible { color: var(--ice); transform: translateY(-2px); }

.hero {
  display: grid;
  grid-template-columns: 1.02fr 0.98fr;
  align-items: center;
  gap: 30px;
  min-height: 460px;
  max-width: 1180px;
  margin: 0 auto;
  padding: 34px 22px 54px;
}

@media (min-width: 880px) {
  .hero { min-height: calc(100svh - 122px); }
}

.hero.solo { grid-template-columns: 1fr; }

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

@media (min-width: 880px) {
  .hero-copy { text-align: right; }
}

.badge {
  display: inline-flex;
  align-items: center;
  margin: 0 0 16px;
  padding: 7px 16px;
  font-size: 16px;
  letter-spacing: 0.08em;
  color: var(--rose);
  border-radius: var(--pill);
  border: 1px solid rgba(245, 224, 232, 0.18);
  background: linear-gradient(145deg, rgba(245, 224, 232, 0.14), rgba(200, 224, 244, 0.05));
  box-shadow: 3px 3px 10px rgba(0, 0, 0, 0.45), -3px -3px 10px rgba(245, 224, 232, 0.06);
}

.hero h1 {
  margin: 0 0 18px;
  font-family: var(--disp);
  font-weight: 700;
  font-size: clamp(2rem, 5.4vw, 3.5rem);
  line-height: 1.18;
  letter-spacing: -0.02em;
  background: linear-gradient(120deg, var(--ice) 10%, var(--rose) 92%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.lede {
  margin: 0 0 6px;
  max-width: 40ch;
  color: var(--dim);
  font-size: 17px;
}

@media (min-width: 880px) {
  .lede { margin-left: auto; }
}

.hero-art {
  position: relative;
  order: -1;
  aspect-ratio: 4 / 5;
  width: 100%;
  max-width: 460px;
  margin: 0 auto;
}

.hero.solo .hero-art { display: none; }

.shot {
  position: absolute;
  margin: 0;
  overflow: hidden;
  border-radius: 16px;
  border: 1px solid rgba(200, 224, 244, 0.1);
  box-shadow: 10px 12px 28px rgba(0, 0, 0, 0.6), -8px -8px 24px rgba(200, 224, 244, 0.07);
}

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

.shot.a { width: 70%; height: 82%; left: 0; top: 0; }

.shot.b { width: 58%; height: 65%; right: 0; bottom: 0; }

main { display: block; }

.wrap {
  display: grid;
  grid-template-columns: 1fr;
  gap: 34px;
  max-width: 1180px;
  margin: 0 auto;
  padding: 42px 22px 72px;
}

@media (min-width: 880px) {
  .wrap { grid-template-columns: 264px minmax(0, 1fr); gap: 44px; padding-top: 64px; }
}

.side {
  order: 2;
  padding: 22px 20px 24px;
  border-radius: var(--card);
  border: 1px solid var(--line);
  border-bottom: 2px solid var(--ice);
  background: linear-gradient(150deg, rgba(200, 224, 244, 0.055), rgba(19, 26, 32, 0.4));
  box-shadow: var(--sh-d), var(--sh-l);
}

@media (min-width: 880px) {
  .side { order: 0; position: sticky; top: 128px; }
}

.side-h {
  margin: 0 0 6px;
  font-family: var(--disp);
  font-size: 19px;
  letter-spacing: 0.14em;
  color: var(--ice);
}

.subtitle {
  margin: 0 0 16px;
  font-size: 16px;
  line-height: 1.6;
  color: var(--dim);
}

.side-list {
  list-style: none;
  margin: 0 0 18px;
  padding: 0;
  display: grid;
  gap: 4px;
}

.side-list a {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 42px;
  padding: 9px 10px;
  border-radius: var(--card);
  font-size: 16px;
  color: var(--txt);
  text-decoration: none;
  border-bottom: 1px solid rgba(200, 224, 244, 0.08);
  transition: background 0.15s ease, color 0.15s ease;
}

.side-list a:hover,
.side-list a:focus-visible {
  color: var(--ice);
  background: rgba(200, 224, 244, 0.07);
}

.side-list b {
  font-family: var(--disp);
  font-weight: 500;
  font-size: 14px;
  color: var(--rose);
  letter-spacing: 0.06em;
}

.totop {
  width: 100%;
  min-height: 42px;
  padding: 10px 14px;
  font: inherit;
  font-size: 16px;
  cursor: pointer;
  border-radius: var(--card);
  border: 1px solid rgba(200, 224, 244, 0.1);
  background: linear-gradient(145deg, var(--ink-up), var(--ink-dn));
  box-shadow: 4px 4px 12px rgba(0, 0, 0, 0.5), -4px -4px 12px rgba(200, 224, 244, 0.05);
  color: var(--ice);
  transition: transform 0.15s ease;
}

.totop:active { transform: scale(0.98); }

.body { min-width: 0; }

.prose {
  font-size: 17px;
  line-height: 1.85;
  color: #d5e3ee;
}

.prose p { margin: 0 0 17px; }

.prose h2 {
  margin: 0 0 14px;
  font-family: var(--disp);
  font-size: clamp(1.4rem, 3.2vw, 1.95rem);
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--ice);
}

.prose h2::after {
  content: '';
  display: block;
  width: 62px;
  height: 2px;
  margin-top: 12px;
  background: linear-gradient(90deg, var(--ice), rgba(245, 224, 232, 0));
}

.prose h3 {
  margin: 26px 0 10px;
  font-family: var(--disp);
  font-size: 1.15rem;
  color: var(--rose);
}

.prose ul,
.prose ol { margin: 0 0 18px; padding-left: 1.25em; }

.prose li { margin: 7px 0; }

.prose a { color: var(--rose); text-underline-offset: 3px; }

.prose strong { color: #ffffff; }

.prose blockquote {
  margin: 22px 0;
  padding: 14px 18px;
  border-left: 3px solid var(--ice);
  border-radius: var(--card);
  background: rgba(200, 224, 244, 0.055);
  color: var(--txt);
}

.prose img { border-radius: 12px; }

.prose > section + section {
  margin-top: 48px;
  padding-top: 42px;
  border-top: 1px solid var(--line);
}

.prose figure { margin: 22px 0; }

.foot {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px 30px;
  max-width: 1180px;
  margin: 0 auto;
  padding: 38px 22px 44px;
  border-top: 1px solid var(--line);
}

.foot-brand a {
  font-family: var(--disp);
  font-weight: 700;
  font-size: clamp(1.4rem, 5vw, 2.6rem);
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--ice);
  text-decoration: none;
  display: inline-block;
  padding: 6px 0;
}

.foot-nav dl {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 2px 10px;
  margin: 0;
}

.foot-nav dt { margin: 0; }

.foot-nav dt a {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  padding: 8px 4px;
  font-size: 16px;
  color: var(--txt);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

.foot-nav dt a:hover,
.foot-nav dt a:focus-visible {
  color: var(--ice);
  border-bottom-color: var(--ice);
}

.foot-nav dd {
  margin: 0;
  font-family: var(--disp);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: rgba(245, 224, 232, 0.65);
}

.foot-copy {
  margin-left: auto;
  font-size: 15px;
  color: var(--dim);
}

@media (max-width: 879px) {
  .hero { grid-template-columns: 1fr; }
  .hero-art { order: 0; width: 88%; }
  .foot-copy { margin-left: 0; }
}

@media (prefers-reduced-motion: no-preference) {
  .badge { animation: floaty 6.5s ease-in-out infinite; }

  @keyframes floaty {
    50% { transform: translateY(-7px); }
  }

  .side-list li {
    animation: rise 0.5s ease both;
  }

  .side-list li:nth-child(1) { animation-delay: 0.04s; }
  .side-list li:nth-child(2) { animation-delay: 0.08s; }
  .side-list li:nth-child(3) { animation-delay: 0.12s; }
  .side-list li:nth-child(4) { animation-delay: 0.16s; }
  .side-list li:nth-child(5) { animation-delay: 0.2s; }
  .side-list li:nth-child(6) { animation-delay: 0.24s; }
  .side-list li:nth-child(7) { animation-delay: 0.28s; }

  @keyframes rise {
    from { opacity: 0; transform: translateY(9px); }
    to { opacity: 1; transform: none; }
  }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .drawer { transition: none; }
}

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