/* 墨览官网 — 墨夜纸面 · 专业开源落地 */
:root {
  --ink: #1e2a24;
  --ink-deep: #101712;
  --ink-lift: #2a3830;
  --fog: #c5d0c8;
  --fog-dim: #8a9a90;
  --paper: #e8efe9;
  --accent: #7eb89a;
  --accent-bright: #9fd4b4;
  --accent-soft: rgba(126, 184, 154, 0.16);
  --hairline: rgba(232, 239, 233, 0.12);
  --hairline-strong: rgba(232, 239, 233, 0.2);
  --serif: "Instrument Serif", "Cormorant Garamond", "Songti SC", serif;
  --sans: "DM Sans", "PingFang SC", "Noto Sans SC", sans-serif;
  --mono: "JetBrains Mono", ui-monospace, monospace;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --top-h: 3.6rem;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--sans);
  font-size: 1.05rem;
  line-height: 1.55;
  color: var(--fog);
  background:
    radial-gradient(1100px 520px at 78% -8%, rgba(126, 184, 154, 0.14), transparent 55%),
    radial-gradient(900px 480px at -5% 90%, rgba(40, 70, 55, 0.45), transparent 50%),
    linear-gradient(168deg, var(--ink-deep) 0%, var(--ink) 46%, #24332c 100%);
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.22em;
}

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

.skip {
  position: absolute;
  left: -999px;
  top: 0;
}
.skip:focus {
  left: 1rem;
  top: 1rem;
  z-index: 40;
  background: var(--paper);
  color: var(--ink-deep);
  padding: 0.5rem 0.75rem;
}

.frame {
  width: min(1120px, calc(100% - 2.5rem));
  margin-inline: auto;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* —— sticky shell —— */
.shell-top {
  position: sticky;
  top: 0;
  z-index: 30;
  backdrop-filter: blur(14px) saturate(1.2);
  -webkit-backdrop-filter: blur(14px) saturate(1.2);
  background: rgba(16, 23, 18, 0.72);
  border-bottom: 1px solid var(--hairline);
}

.shell-top-inner {
  min-height: var(--top-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.mark {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  text-decoration: none;
  color: var(--paper);
  min-width: 0;
}

.mark-icon {
  width: 28px;
  height: 28px;
  border-radius: 7px;
  box-shadow: 0 0 0 1px var(--hairline-strong);
  flex-shrink: 0;
}

.mark-word {
  font-family: var(--serif);
  font-size: 1.35rem;
  letter-spacing: 0.04em;
  line-height: 1;
}
.mark-word span {
  color: var(--accent);
}

.mark-en {
  font-family: var(--serif);
  font-style: italic;
  font-size: 0.95rem;
  color: var(--fog-dim);
  letter-spacing: 0.08em;
  margin-left: 0.1rem;
}

.shell-actions {
  display: flex;
  align-items: center;
  gap: 0.85rem 1.1rem;
}

.shell-nav {
  display: flex;
  align-items: center;
  gap: 0.15rem 1.05rem;
  font-size: 0.9rem;
  color: var(--fog-dim);
}

.shell-nav a {
  text-decoration: none;
  transition: color 0.2s var(--ease);
}
.shell-nav a:hover {
  color: var(--paper);
}

.nav-github {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.28rem 0.45rem 0.28rem 0.55rem;
  border: 1px solid var(--hairline-strong);
  border-radius: 999px;
  background: rgba(126, 184, 154, 0.08);
  color: var(--paper);
  cursor: pointer;
  transition: border-color 0.2s var(--ease), background 0.2s var(--ease);
}
.lang-switch:hover,
.lang-switch:focus-within {
  border-color: var(--accent);
  background: rgba(126, 184, 154, 0.14);
}

.lang-icon {
  flex-shrink: 0;
  opacity: 0.9;
}

.lang-switch select {
  appearance: none;
  -webkit-appearance: none;
  border: 0;
  background: transparent;
  color: inherit;
  font-family: var(--sans);
  font-size: 0.82rem;
  font-weight: 500;
  line-height: 1.2;
  padding: 0.1rem 1.1rem 0.1rem 0;
  cursor: pointer;
  min-width: 6.5rem;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6' viewBox='0 0 10 6'%3E%3Cpath fill='%23c5d0c8' d='M1 1l4 4 4-4'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.1rem center;
}
.lang-switch select:focus {
  outline: none;
}

/* —— home (actions + inline guide) —— */
.home-frame {
  width: min(1180px, calc(100% - 2.5rem));
}

.home-main {
  padding: 1.35rem 0 0;
  animation: rise 0.75s var(--ease) both;
}

.home-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 0.55rem;
  margin-bottom: 2rem;
}

.home-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.52rem 0.95rem;
  border-radius: 999px;
  text-decoration: none;
  font-family: var(--sans);
  font-size: 0.88rem;
  font-weight: 600;
  line-height: 1.25;
  border: 1px solid var(--hairline-strong);
  background: rgba(232, 239, 233, 0.05);
  color: var(--fog);
  transition: border-color 0.2s var(--ease), background 0.2s var(--ease), color 0.2s var(--ease);
}

.home-action:hover {
  border-color: var(--accent);
  background: var(--accent-soft);
  color: var(--paper);
}

.home-action-primary {
  background: var(--paper);
  color: var(--ink-deep);
  border-color: transparent;
}

.home-action-primary:hover {
  background: #fff;
  color: var(--ink-deep);
}

.home-action-quiet {
  font-weight: 500;
  color: var(--fog-dim);
  background: transparent;
  border-color: var(--hairline);
}

.home-action-quiet:hover {
  color: var(--paper);
}

.home-guide {
  padding-top: 0.25rem;
  border-top: 1px solid var(--hairline);
}

.home-guide .portal-section:first-child {
  margin-top: 1.5rem;
}

.home-contribute {
  margin-top: 3rem;
}

/* —— hero (legacy / unused on homepage) —— */
.hero {
  min-height: calc(100vh - var(--top-h) - 1rem);
  display: grid;
  grid-template-rows: auto 1fr;
  padding: 2.25rem 0 2.5rem;
  animation: rise 0.85s var(--ease) both;
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(14px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.hero-copy {
  max-width: 40rem;
  padding-bottom: 2rem;
}

.brand-display {
  margin: 0 0 0.85rem;
  font-family: var(--serif);
  font-size: clamp(3.4rem, 9vw, 5.6rem);
  font-weight: 400;
  line-height: 0.92;
  letter-spacing: 0.02em;
  color: var(--paper);
  animation: rise 0.9s 0.05s var(--ease) both;
}
.brand-display span {
  color: var(--accent);
}

.hero h1 {
  margin: 0 0 0.9rem;
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(1.55rem, 3.1vw, 2.15rem);
  line-height: 1.28;
  color: var(--paper);
  animation: rise 0.9s 0.12s var(--ease) both;
}

.hero .lede {
  margin: 0 0 1.85rem;
  color: var(--fog-dim);
  font-size: 1.08rem;
  max-width: 30rem;
  animation: rise 0.9s 0.18s var(--ease) both;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 0.9rem;
  align-items: center;
  animation: rise 0.9s 0.24s var(--ease) both;
}

.cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: 999px;
  transition: transform 0.2s var(--ease), background 0.2s var(--ease), border-color 0.2s var(--ease), color 0.2s var(--ease);
}

.cta-primary {
  padding: 0.78rem 1.35rem;
  background: var(--paper);
  color: var(--ink-deep);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.22);
}
.cta-primary:hover {
  background: #fff;
  transform: translateY(-1px);
}

.cta-secondary {
  padding: 0.72rem 1.2rem;
  border: 1px solid var(--hairline-strong);
  color: var(--paper);
  background: rgba(255, 255, 255, 0.03);
}
.cta-secondary:hover {
  border-color: var(--accent);
  color: var(--accent-bright);
}

.cta-text {
  padding: 0.45rem 0.35rem;
  color: var(--fog-dim);
  font-weight: 500;
  border-radius: 0;
}
.cta-text:hover {
  color: var(--paper);
}

.hero-stage {
  position: relative;
  margin-top: auto;
  border: 1px solid var(--hairline-strong);
  border-radius: 12px;
  overflow: hidden;
  background: var(--ink-lift);
  box-shadow:
    0 1px 0 rgba(255, 255, 255, 0.04) inset,
    0 40px 90px rgba(0, 0, 0, 0.42);
  animation: stage-in 1.05s 0.2s var(--ease) both;
}

@keyframes stage-in {
  from {
    opacity: 0;
    transform: translateY(22px) scale(0.985);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.stage-chrome {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.65rem 0.9rem;
  background: rgba(0, 0, 0, 0.28);
  border-bottom: 1px solid var(--hairline);
}

.stage-chrome span {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: #3d4a42;
}
.stage-chrome span:nth-child(1) { background: #6b7370; }
.stage-chrome span:nth-child(2) { background: #55635b; }
.stage-chrome span:nth-child(3) { background: #445048; }

.stage-chrome em {
  margin-left: 0.55rem;
  font-style: normal;
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  color: var(--fog-dim);
}

.hero-stage img {
  width: 100%;
  height: auto;
}

.hero-stage::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 28%;
  pointer-events: none;
  background: linear-gradient(to top, rgba(16, 23, 18, 0.4), transparent);
}

/* —— sections —— */
.section {
  padding: 5rem 0 1.5rem;
  border-top: 1px solid var(--hairline);
  animation: rise 0.8s 0.15s var(--ease) both;
}

.section-head {
  max-width: 36rem;
  margin-bottom: 1.5rem;
}

.section h2,
.section-head h2 {
  margin: 0 0 0.55rem;
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(1.7rem, 3vw, 2rem);
  color: var(--paper);
}

.section-head p {
  margin: 0;
  color: var(--fog-dim);
}

.id-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.65rem;
  margin-bottom: 1.35rem;
}

.install-id {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.86rem;
  padding: 0.55rem 0.8rem;
  background: var(--accent-soft);
  color: var(--accent-bright);
  border: 1px solid rgba(126, 184, 154, 0.28);
  border-radius: 8px;
}

.copy-id {
  border: 1px solid var(--hairline-strong);
  background: rgba(0, 0, 0, 0.2);
  color: var(--paper);
  font-family: var(--sans);
  font-size: 0.8rem;
  font-weight: 500;
  padding: 0.45rem 0.75rem;
  border-radius: 999px;
  cursor: pointer;
}
.copy-id:hover,
.copy-id.is-done {
  border-color: var(--accent);
  color: var(--accent-bright);
}

.store-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.85rem;
}

.store-card {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 0.85rem;
  padding: 1rem 1.05rem;
  text-decoration: none;
  border: 1px solid var(--hairline);
  border-radius: 12px;
  background: rgba(0, 0, 0, 0.18);
  transition: border-color 0.2s var(--ease), background 0.2s var(--ease), transform 0.2s var(--ease);
}
.store-card:hover {
  border-color: rgba(126, 184, 154, 0.45);
  background: rgba(126, 184, 154, 0.07);
  transform: translateY(-1px);
}

.store-icon {
  display: grid;
  place-items: center;
  width: 2.4rem;
  height: 2.4rem;
  border-radius: 9px;
  background: var(--accent-soft);
  color: var(--accent-bright);
}

.store-meta {
  display: grid;
  gap: 0.15rem;
  min-width: 0;
}
.store-meta strong {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--paper);
}
.store-meta span {
  font-size: 0.78rem;
  color: var(--fog-dim);
}

.store-arrow {
  color: var(--fog-dim);
  font-size: 1.1rem;
}

.ai-box {
  margin-top: 2.25rem;
  padding: 1.45rem 1.5rem;
  border: 1px solid var(--hairline-strong);
  border-radius: 14px;
  background:
    linear-gradient(135deg, rgba(126, 184, 154, 0.08), transparent 42%),
    rgba(0, 0, 0, 0.22);
}

.ai-head {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  margin-bottom: 0.55rem;
}

.ai-badge {
  display: inline-grid;
  place-items: center;
  min-width: 2rem;
  height: 1.45rem;
  padding: 0 0.45rem;
  border-radius: 999px;
  background: var(--accent);
  color: var(--ink-deep);
  font-family: var(--mono);
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.04em;
}

.ai-box h3 {
  margin: 0;
  font-family: var(--serif);
  font-weight: 400;
  font-size: 1.3rem;
  color: var(--paper);
}

.ai-box > p {
  margin: 0 0 0.9rem;
  color: var(--fog-dim);
  max-width: 40rem;
}

.ai-box pre {
  margin: 0;
  padding: 0.95rem 4.5rem 0.95rem 1rem;
  overflow-x: auto;
  font-family: var(--mono);
  font-size: 0.78rem;
  line-height: 1.5;
  color: var(--fog);
  background: var(--ink-deep);
  border-radius: 8px;
  white-space: pre-wrap;
  border: 1px solid var(--hairline);
}

.copy-block {
  position: relative;
}

.copy-btn {
  position: absolute;
  top: 0.55rem;
  right: 0.55rem;
  border: 1px solid var(--hairline-strong);
  background: rgba(30, 42, 36, 0.95);
  color: var(--paper);
  font-family: var(--sans);
  font-size: 0.78rem;
  padding: 0.35rem 0.65rem;
  border-radius: 999px;
  cursor: pointer;
}
.copy-btn:hover,
.copy-btn.is-done {
  color: var(--accent-bright);
  border-color: var(--accent);
}

.ai-links {
  margin: 0.95rem 0 0;
  font-size: 0.92rem;
  color: var(--fog-dim);
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem 0.55rem;
}
.ai-links a {
  color: var(--paper);
}
.ai-links a:hover {
  color: var(--accent-bright);
}

.foot {
  padding: 2.75rem 0 2.5rem;
  margin-top: 3rem;
  border-top: 1px solid var(--hairline);
  font-size: 0.85rem;
  color: var(--fog-dim);
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.5rem;
  justify-content: space-between;
  align-items: center;
}

.foot-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
}
.foot-brand img {
  border-radius: 4px;
}

.foot a {
  color: var(--fog);
}
.foot a:hover {
  color: var(--accent-bright);
}

/* docs / secondary: quiet brand in old .top if any */
.top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  padding: 1.25rem 0 0;
  font-size: 0.92rem;
  color: var(--fog-dim);
}
.top-end {
  display: flex;
  align-items: center;
  gap: 1rem 1.35rem;
}
.brand-mark {
  font-family: var(--serif);
  font-size: 1.4rem;
  color: var(--paper);
  text-decoration: none;
  display: inline-flex;
  align-items: baseline;
  gap: 0.35rem;
}
.brand-mark span { color: var(--accent); }
.brand-mark em {
  font-style: italic;
  font-size: 0.75em;
  color: var(--fog-dim);
}

.section h3 {
  margin: 0 0 0.6rem;
  font-family: var(--serif);
  font-weight: 400;
  font-size: 1.85rem;
  color: var(--paper);
}

.section p {
  margin: 0 0 1.25rem;
  max-width: 36rem;
  color: var(--fog-dim);
}

@media (max-width: 900px) {
  .store-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 720px) {
  .frame,
  .home-frame {
    width: min(1120px, calc(100% - 1.5rem));
  }
  .mark-en {
    display: none;
  }
  .shell-nav a:not(.nav-github) {
    display: none;
  }
  .nav-github span {
    display: none;
  }
  .hero {
    padding-top: 1.5rem;
  }
  .brand-display {
    font-size: clamp(2.8rem, 14vw, 3.6rem);
  }
  .lang-switch select {
    min-width: 5.2rem;
  }
}