:root {
  --paper: #f5e6c8;
  --paper-lift: #fbf3e2;
  --tan: #d4a574;
  --ink: #262117;
  --rust: #8f3a22;
  --muted: #6c6047;
  --line: rgba(38, 33, 23, 0.22);
  --dock-h: 64px;
  --serif: "Playfair Display", "Songti SC", "Noto Serif SC", "Source Han Serif SC", Georgia, serif;
}

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

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

body {
  margin: 0;
  font-family: Inter, -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  font-size: 17px;
  line-height: 1.8;
  color: var(--ink);
  background:
    radial-gradient(120% 80% at 10% 0%, #fdf6e7 0%, rgba(253, 246, 231, 0) 62%),
    radial-gradient(90% 70% at 92% 10%, rgba(212, 165, 116, 0.4) 0%, rgba(212, 165, 116, 0) 64%),
    var(--paper);
  padding-bottom: calc(var(--dock-h) + 2.4rem);
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 55;
  pointer-events: none;
  opacity: 0.32;
  mix-blend-mode: multiply;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='150' height='150'%3E%3Cfilter id='g'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.86' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='150' height='150' filter='url(%23g)' opacity='0.55'/%3E%3C/svg%3E");
}

body::after {
  content: "";
  position: fixed;
  inset: -10%;
  z-index: 54;
  pointer-events: none;
  mix-blend-mode: soft-light;
  background:
    radial-gradient(28% 22% at 78% 12%, rgba(255, 214, 150, 0.9) 0%, rgba(255, 214, 150, 0) 70%),
    radial-gradient(26% 20% at 14% 64%, rgba(255, 168, 98, 0.6) 0%, rgba(255, 168, 98, 0) 72%);
  animation: leakDrift 22s ease-in-out infinite alternate;
}

@keyframes leakDrift {
  0% { transform: translate3d(0, 0, 0) scale(1); opacity: 0.4; }
  50% { transform: translate3d(-3%, 2%, 0) scale(1.08); opacity: 0.62; }
  100% { transform: translate3d(2%, -2%, 0) scale(1.04); opacity: 0.38; }
}

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

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

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

p {
  margin: 0 0 1.05rem;
}

.stage {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 1.2rem;
}

/* ---------- 首屏 ---------- */
.hero {
  min-height: 45vh;
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  align-items: center;
  gap: 1.8rem;
  padding: 2rem 0 1.6rem;
  border-bottom: 2px solid var(--ink);
}

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

.hero-kicker {
  display: inline-block;
  font-size: 0.85rem;
  letter-spacing: 0.3em;
  color: var(--rust);
  margin: 0 0 0.2rem;
}

.hero h1 {
  font-family: var(--serif);
  font-weight: 800;
  font-size: clamp(2rem, 5.4vw, 3.35rem);
  line-height: 1.18;
  letter-spacing: 0.01em;
  margin: 0.4rem 0 0.9rem;
}

.lede {
  max-width: 36ch;
  margin: 0 auto 1rem;
  font-size: 1rem;
  color: var(--muted);
}

.hero-hint {
  font-size: 0.86rem;
  letter-spacing: 0.16em;
  color: var(--rust);
  margin: 0;
}

.hero-frame {
  position: relative;
  margin: 0;
  padding: 0.8rem 0.8rem 2.3rem;
  background: var(--paper-lift);
  border: 1px solid var(--ink);
  box-shadow: 10px 12px 0 rgba(38, 33, 23, 0.16);
  transform: rotate(-1.6deg);
  animation: frameSway 9s ease-in-out infinite;
}

@keyframes frameSway {
  0%, 100% { transform: rotate(-1.6deg) skewX(0deg); }
  48% { transform: rotate(-1.2deg) skewX(0.5deg); }
  52% { transform: rotate(-1.9deg) skewX(-0.5deg); }
}

.hero-frame::after {
  content: "";
  position: absolute;
  inset: 0.55rem;
  pointer-events: none;
  background: repeating-linear-gradient(0deg, rgba(38, 33, 23, 0.06) 0 1px, transparent 1px 3px);
}

.film-photo {
  width: 100%;
  filter: sepia(0.28) contrast(1.04) saturate(0.82);
}

.film-blank {
  aspect-ratio: 4 / 3;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(158deg, #ecd9b4, #cfae83);
}

.film-blank span {
  font-size: 0.82rem;
  letter-spacing: 0.32em;
  color: rgba(38, 33, 23, 0.6);
}

.hero-frame figcaption {
  position: absolute;
  left: 0.8rem;
  right: 0.8rem;
  bottom: 0.6rem;
  text-align: center;
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  color: var(--muted);
}

/* ---------- 正文与右栏 ---------- */
.columns {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 19rem;
  gap: 2.6rem;
  align-items: start;
  padding: 2rem 0 2.6rem;
}

.paper {
  min-width: 0;
  max-width: 72ch;
}

.paper section {
  padding: 2.2rem 0;
  border-top: 1px dashed var(--line);
  scroll-margin-top: 1rem;
  scroll-margin-bottom: calc(var(--dock-h) + 1.6rem);
}

.paper section:first-child {
  border-top: 0;
  padding-top: 0.2rem;
}

.paper h2 {
  font-family: var(--serif);
  font-size: clamp(1.4rem, 3.3vw, 1.95rem);
  line-height: 1.35;
  margin: 1.5rem 0 0.85rem;
}

.paper h3 {
  font-size: 1.14rem;
  line-height: 1.5;
  margin: 1.4rem 0 0.6rem;
}

.paper ul,
.paper ol {
  margin: 0 0 1.1rem;
  padding-left: 1.25rem;
}

.paper li {
  margin: 0.35rem 0;
}

.paper figure {
  margin: 1.5rem 0;
  padding: 0.7rem 0.7rem 1.3rem;
  background: var(--paper-lift);
  border: 1px solid var(--line);
  transform: rotate(-0.5deg);
}

.paper blockquote {
  margin: 1.4rem 0;
  padding: 0.5rem 0 0.5rem 1rem;
  border-left: 3px solid var(--tan);
  color: var(--muted);
  font-style: italic;
}

.paper table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.2rem 0;
}

.paper th,
.paper td {
  border: 1px solid var(--line);
  padding: 0.55rem 0.7rem;
  text-align: left;
}

.rail {
  min-width: 0;
  position: sticky;
  top: 1.2rem;
  padding-left: 1.1rem;
  border-left: 2px solid var(--tan);
}

.rail small {
  display: block;
  font-size: 0.8rem;
  letter-spacing: 0.3em;
  color: var(--rust);
}

.rail h2 {
  font-family: var(--serif);
  font-size: 1.16rem;
  margin: 0.35rem 0 0.9rem;
}

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

.rail-list li + li {
  border-top: 1px dotted var(--line);
}

.rail-list a {
  display: block;
  padding: 0.62rem 0.2rem;
  min-height: 44px;
  font-size: 0.95rem;
  color: var(--ink);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.rail-list a:hover {
  color: var(--rust);
  border-bottom-color: var(--tan);
}

.rail-note {
  margin-top: 1rem;
  font-size: 0.85rem;
  color: var(--muted);
}

/* ---------- 页脚 ---------- */
.plate {
  margin-top: 1rem;
  padding: 2.4rem 1.2rem 1.2rem;
  background: var(--ink);
  color: var(--paper);
  border-top: 4px solid var(--tan);
}

.plate-cols {
  max-width: 1180px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 2rem;
}

.bigmark {
  font-family: var(--serif);
  font-size: clamp(2.4rem, 9vw, 5.4rem);
  line-height: 1;
  letter-spacing: 0.04em;
  margin: 0 0 0.9rem;
  color: var(--paper);
}

.plate address {
  font-style: normal;
  font-size: 0.95rem;
  line-height: 1.85;
  color: rgba(245, 230, 200, 0.82);
}

.plate-note {
  margin: 0.9rem 0 0;
  font-size: 0.87rem;
  color: rgba(245, 230, 200, 0.62);
}

.plate small {
  display: block;
  font-size: 0.8rem;
  letter-spacing: 0.3em;
  color: var(--tan);
}

.plate h2 {
  font-family: var(--serif);
  font-size: 1.16rem;
  margin: 0.35rem 0 0.8rem;
  color: var(--paper);
}

.plate ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0 0.9rem;
}

.plate li a {
  display: flex;
  align-items: center;
  min-height: 44px;
  padding: 0.5rem 0;
  font-size: 0.92rem;
  color: rgba(245, 230, 200, 0.9);
  text-decoration: none;
  border-bottom: 1px dotted rgba(245, 230, 200, 0.25);
}

.plate li a:hover {
  color: var(--tan);
}

.plate-base {
  max-width: 1180px;
  margin: 1.6rem auto 0;
  padding-top: 1rem;
  border-top: 1px solid rgba(245, 230, 200, 0.2);
  text-align: center;
}

.plate-base p {
  margin: 0;
  font-size: 0.83rem;
  color: rgba(245, 230, 200, 0.62);
}

/* ---------- 底部固定导航 ---------- */
.dock {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 70;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 0.3rem;
  padding: 0.35rem 0.55rem calc(0.35rem + env(safe-area-inset-bottom));
  background: var(--ink);
  border-top: 3px solid var(--tan);
  box-shadow: 0 -8px 24px rgba(38, 33, 23, 0.22);
}

.dock details {
  position: relative;
  justify-self: start;
}

.dock details.dock-b {
  justify-self: end;
}

.dock summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  min-height: 44px;
  padding: 0.5rem 0.8rem;
  border: 1px solid rgba(245, 230, 200, 0.4);
  color: var(--paper);
  font-size: 0.9rem;
  letter-spacing: 0.16em;
}

.dock summary::-webkit-details-marker {
  display: none;
}

.dock summary::after {
  content: "▲";
  font-size: 0.62rem;
  color: var(--tan);
  transition: transform 0.2s ease;
}

.dock details[open] summary::after {
  transform: rotate(180deg);
}

.dock menu {
  position: absolute;
  bottom: calc(100% + 0.55rem);
  left: 0;
  margin: 0;
  padding: 0.4rem;
  min-width: 11.5rem;
  list-style: none;
  background: var(--paper);
  border: 1px solid var(--ink);
  box-shadow: 7px 7px 0 rgba(38, 33, 23, 0.3);
}

.dock-b menu {
  left: auto;
  right: 0;
}

.dock menu li a {
  display: flex;
  align-items: center;
  min-height: 44px;
  padding: 0.5rem 0.7rem;
  font-size: 0.94rem;
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px dotted var(--line);
}

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

.dock menu li a:hover {
  background: var(--paper-lift);
  color: var(--rust);
}

.dock-brand {
  justify-self: center;
  display: flex;
  align-items: center;
  min-height: 44px;
  padding: 0.5rem 0.6rem;
  font-family: var(--serif);
  font-size: 1rem;
  letter-spacing: 0.22em;
  color: var(--paper);
  text-decoration: none;
  border-bottom: 2px solid var(--tan);
}

/* ---------- 桌面端导航展开 ---------- */
@media (min-width: 880px) {
  .dock {
    padding: 0.4rem 1.2rem calc(0.4rem + env(safe-area-inset-bottom));
  }

  .dock summary {
    display: none;
  }

  .dock details {
    position: static;
  }

  .dock menu {
    position: static;
    display: flex;
    gap: 0.15rem;
    min-width: 0;
    padding: 0;
    background: none;
    border: 0;
    box-shadow: none;
  }

  .dock menu li a {
    padding: 0.55rem 0.6rem;
    color: rgba(245, 230, 200, 0.92);
    border-bottom: 2px solid transparent;
    border-radius: 0;
  }

  .dock menu li a:hover {
    background: none;
    color: var(--paper);
    border-bottom-color: var(--tan);
  }
}

/* ---------- 窄屏 ---------- */
@media (max-width: 879px) {
  .hero {
    grid-template-columns: 1fr;
    min-height: 0;
    padding-top: 1.4rem;
  }

  .hero-frame {
    max-width: 420px;
    margin: 0 auto;
  }

  .columns {
    grid-template-columns: 1fr;
    gap: 1.6rem;
  }

  .rail {
    position: static;
    padding-left: 0;
    padding-top: 1rem;
    border-left: 0;
    border-top: 2px solid var(--tan);
  }

  .plate-cols {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 420px) {
  .dock summary {
    padding: 0.5rem 0.6rem;
    letter-spacing: 0.08em;
  }

  .dock-brand {
    letter-spacing: 0.12em;
    font-size: 0.92rem;
  }

  .plate ul {
    grid-template-columns: 1fr;
  }
}

/* ---------- 滚动入场 ---------- */
.rv {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.rv.in {
  opacity: 1;
  transform: none;
}

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

  .rv {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .hero-frame,
  body::after {
    animation: none;
  }
}

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