:root {
  /* 亮色文学出版：暖纸底 + 深咖字 + 赭石金强调 */
  --bg: #faf6f0;
  --bg-elev: #ffffff;
  --surface: color-mix(in oklab, var(--bg-elev) 92%, var(--accent) 8%);
  --text: #1c1614;
  --text-muted: color-mix(in oklab, var(--text) 42%, #8a7f76 58%);
  --accent: #9a6230;
  --accent-soft: color-mix(in oklab, var(--accent) 22%, var(--bg) 78%);
  --border: color-mix(in oklab, var(--text) 12%, transparent);
  --radius: 12px;
  --font-display: "Outfit", system-ui, sans-serif;
  --font-body: "Noto Sans SC", system-ui, sans-serif;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

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

html {
  scroll-behavior: smooth;
  scroll-snap-type: y mandatory;
  scroll-padding-top: 4.35rem;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
    scroll-snap-type: none;
  }
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

body {
  margin: 0;
  min-height: 100vh;
  min-height: 100dvh;
  font-family: var(--font-body);
  font-size: clamp(16px, 1.15vw, 18px);
  line-height: 1.72;
  color: var(--text);
  background: var(--bg);
}

/* 全屏底色：纯 CSS 渐变叠化，无外链图、加载稳定 */
.ambient-bgs {
  position: fixed;
  inset: 0;
  z-index: 0;
  overflow: hidden;
  pointer-events: none;
}

.ambient-bgs__layer {
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity 1.05s var(--ease);
  will-change: opacity;
}

.ambient-bgs__layer.is-active {
  opacity: 1;
}

.ambient-bgs__pic {
  position: absolute;
  inset: 0;
  background-color: #f0e8df;
  background-size: 100% 100%;
  background-position: center;
  background-repeat: no-repeat;
  transform: translateZ(0);
}

.ambient-bgs__pic--0 {
  background-image:
    radial-gradient(100% 70% at 90% 8%, rgba(196, 154, 108, 0.22), transparent 55%),
    linear-gradient(155deg, #faf6f0 0%, #ebe2d6 48%, #e2d5c8 100%);
}

.ambient-bgs__pic--1 {
  background-image:
    radial-gradient(80% 60% at 12% 18%, rgba(180, 130, 120, 0.18), transparent 50%),
    linear-gradient(175deg, #f8f3ec 0%, #eadfd4 55%, #dccfbf 100%);
}

.ambient-bgs__pic--2 {
  background-image:
    radial-gradient(70% 55% at 75% 85%, rgba(140, 155, 130, 0.16), transparent 52%),
    linear-gradient(195deg, #f5f2eb 0%, #e4e6dc 50%, #d8d9cc 100%);
}

.ambient-bgs__pic--3 {
  background-image:
    radial-gradient(90% 65% at 50% 0%, rgba(160, 150, 145, 0.14), transparent 48%),
    linear-gradient(180deg, #faf8f5 0%, #ebe8e2 45%, #ddd9d2 100%);
}

.ambient-bgs__pic--4 {
  background-image:
    radial-gradient(85% 70% at 20% 90%, rgba(200, 160, 95, 0.2), transparent 55%),
    linear-gradient(165deg, #fffaf4 0%, #f0e4d4 40%, #e5d4c0 100%);
}

.ambient-scrim {
  position: fixed;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background: linear-gradient(
    180deg,
    rgba(255, 253, 250, 0.78) 0%,
    rgba(254, 251, 246, 0.62) 42%,
    rgba(252, 247, 241, 0.7) 100%
  );
}

.grain {
  pointer-events: none;
  position: fixed;
  inset: 0;
  z-index: 3;
  opacity: 0.055;
  mix-blend-mode: multiply;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem clamp(1.25rem, 4vw, 2.5rem);
  background: color-mix(in oklab, var(--bg) 58%, transparent);
  backdrop-filter: blur(16px) saturate(140%);
  -webkit-backdrop-filter: blur(16px) saturate(140%);
  border-bottom: 1px solid var(--border);
}

.logo {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
  color: var(--text);
  text-decoration: none;
}

.logo span {
  color: var(--accent);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: clamp(1rem, 3vw, 2rem);
}

.site-nav a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  transition: color 0.25s var(--ease);
}

.site-nav a:hover {
  color: var(--text);
}

.nav-cta {
  padding: 0.45rem 1rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--text) !important;
  background: color-mix(in oklab, var(--accent) 12%, transparent);
}

.nav-cta:hover {
  background: color-mix(in oklab, var(--accent) 22%, transparent);
}

.nav-toggle {
  display: none;
  width: 2.5rem;
  height: 2.5rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-elev);
  cursor: pointer;
  position: relative;
}

.nav-toggle::before,
.nav-toggle::after {
  content: "";
  position: absolute;
  left: 0.65rem;
  right: 0.65rem;
  height: 2px;
  background: var(--text);
  transition: transform 0.3s var(--ease), opacity 0.3s;
}

.nav-toggle::before {
  top: 0.9rem;
}

.nav-toggle::after {
  top: 1.35rem;
}

.nav-toggle[aria-expanded="true"]::before {
  transform: translateY(0.22rem) rotate(45deg);
}

.nav-toggle[aria-expanded="true"]::after {
  transform: translateY(-0.23rem) rotate(-45deg);
}

main {
  position: relative;
  z-index: 2;
  overflow-x: clip;
}

/* 整屏分节：每块至少一屏，纵向吸附 */
.screen {
  box-sizing: border-box;
  width: 100%;
  max-width: 90rem;
  margin-inline: auto;
  min-height: 100vh;
  min-height: 100dvh;
  scroll-snap-align: start;
  scroll-snap-stop: always;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: clamp(2.25rem, 5.5vh, 4.25rem);
  padding: clamp(3rem, 11vh, 7.5rem) clamp(1.75rem, 7vw, 5rem);
}

.hero-kicker {
  margin: 0 0 clamp(1rem, 2vh, 1.5rem);
  font-size: 0.82rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--accent);
  opacity: 0;
  animation: fade-up 0.7s var(--ease) 0.05s forwards;
}

.hero-title {
  margin: 0 0 clamp(1.25rem, 3vh, 2rem);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(2.5rem, 6.5vw, 4.25rem);
  line-height: 1.06;
  letter-spacing: -0.03em;
}

.hero-title .line {
  display: block;
  opacity: 0;
  transform: translateY(1.25rem);
  animation: fade-up 0.75s var(--ease) forwards;
}

.hero-title .line:nth-child(1) {
  animation-delay: 0.12s;
}

.hero-title .line:nth-child(2) {
  animation-delay: 0.22s;
}

.hero-title .accent {
  color: var(--accent);
}

.hero-lead {
  max-width: 44rem;
  margin: 0 0 clamp(2rem, 4.5vh, 3rem);
  color: var(--text-muted);
  font-size: clamp(1.05rem, 1.3vw, 1.2rem);
  line-height: 1.82;
  opacity: 0;
  animation: fade-up 0.7s var(--ease) 0.32s forwards;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1.1rem 1.25rem;
  margin-bottom: 0;
  opacity: 0;
  animation: fade-up 0.7s var(--ease) 0.42s forwards;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.85rem 1.6rem;
  border-radius: 999px;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.9rem;
  text-decoration: none;
  transition: transform 0.25s var(--ease), background 0.25s, border-color 0.25s;
}

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

.btn-primary {
  background: var(--accent);
  color: #fffdf9;
  border: 1px solid color-mix(in oklab, var(--accent) 55%, #3d2418 45%);
}

.btn-primary:hover {
  filter: brightness(1.06);
}

.btn-ghost {
  background: rgba(255, 255, 255, 0.45);
  color: var(--text);
  border: 1px solid color-mix(in oklab, var(--text) 18%, transparent);
}

.btn-ghost:hover {
  border-color: color-mix(in oklab, var(--accent) 55%, transparent);
  background: color-mix(in oklab, var(--accent) 12%, #fff 88%);
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(1.35rem, 3.5vw, 3rem);
  margin: clamp(3rem, 8vh, 5rem) 0 0;
  padding: clamp(2rem, 4.5vh, 2.75rem) 0 0;
  border-top: 1px solid var(--border);
  opacity: 0;
  animation: fade-up 0.7s var(--ease) 0.52s forwards;
}

.hero-stats dt {
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
}

.hero-stats dd {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(1rem, 1.1vw, 1.1rem);
}

.section-head {
  max-width: 46rem;
  margin-bottom: 0;
}

.section-head h2 {
  margin: 0 0 clamp(0.85rem, 2vh, 1.35rem);
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 700;
  letter-spacing: -0.025em;
  line-height: 1.12;
}

.section-head p {
  margin: 0;
  color: var(--text-muted);
  font-size: clamp(1.05rem, 1.3vw, 1.2rem);
  line-height: 1.82;
  max-width: 42rem;
}

.about-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(1.35rem, 3.2vw, 2.35rem);
}

.card {
  padding: clamp(1.85rem, 3.8vh, 2.65rem) clamp(1.5rem, 3vw, 2.15rem);
  border-radius: calc(var(--radius) + 2px);
  background: linear-gradient(
    155deg,
    color-mix(in oklab, var(--bg-elev) 68%, transparent),
    color-mix(in oklab, var(--bg-elev) 52%, transparent)
  );
  backdrop-filter: blur(18px) saturate(140%);
  -webkit-backdrop-filter: blur(18px) saturate(140%);
  border: 1px solid var(--border);
  transition: border-color 0.3s var(--ease), transform 0.3s var(--ease);
}

.card:hover {
  border-color: color-mix(in oklab, var(--accent) 35%, transparent);
  transform: translateY(-2px);
}

.card h3 {
  margin: 0 0 0.85rem;
  font-size: clamp(1.08rem, 1.2vw, 1.2rem);
  font-family: var(--font-display);
}

.card p {
  margin: 0;
  font-size: clamp(0.98rem, 1.1vw, 1.05rem);
  color: var(--text-muted);
  line-height: 1.78;
}

.services {
  background: none;
}

.service-list {
  list-style: none;
  margin: 0;
  padding: clamp(0.35rem, 1vh, 0.65rem) 0;
  display: flex;
  flex-direction: column;
  gap: 0;
  border-radius: calc(var(--radius) + 2px);
  border: 1px solid var(--border);
  overflow: hidden;
}

.service-list li {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.85rem 2rem;
  padding: clamp(1.55rem, 3.2vh, 2.15rem) clamp(1.5rem, 3.5vw, 2.65rem);
  border-bottom: 1px solid var(--border);
  background: color-mix(in oklab, var(--bg-elev) 62%, transparent);
  backdrop-filter: blur(14px) saturate(130%);
  -webkit-backdrop-filter: blur(14px) saturate(130%);
  transition: background 0.25s var(--ease);
}

.service-list li:last-child {
  border-bottom: 0;
}

.service-list li:hover {
  background: color-mix(in oklab, var(--bg-elev) 72%, var(--accent) 10%);
}

.service-list strong {
  font-family: var(--font-display);
  font-size: clamp(1.12rem, 1.35vw, 1.28rem);
  font-weight: 600;
  letter-spacing: -0.02em;
}

.service-list span {
  font-size: clamp(0.92rem, 1.05vw, 1rem);
  color: var(--text-muted);
  line-height: 1.65;
  text-align: right;
}

.cases-strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(1.25rem, 3vw, 2.15rem);
}

.cases-strip figure {
  margin: 0;
  min-height: clamp(14rem, 30vh, 19rem);
  padding: clamp(1.75rem, 3.5vh, 2.35rem);
  border-radius: calc(var(--radius) + 2px);
  border: 1px solid var(--border);
  background:
    radial-gradient(120% 90% at 15% 0%, color-mix(in oklab, var(--accent) 22%, transparent), transparent 55%),
    color-mix(in oklab, var(--bg-elev) 58%, transparent);
  backdrop-filter: blur(16px) saturate(135%);
  -webkit-backdrop-filter: blur(16px) saturate(135%);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  transition: transform 0.35s var(--ease);
}

.cases-strip figure::before {
  content: "";
  flex: 1;
  min-height: clamp(1.25rem, 3vh, 2.5rem);
}

.cases-strip figure:hover {
  transform: translateY(-3px);
}

.cases-strip figcaption {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(1.02rem, 1.15vw, 1.12rem);
  margin-bottom: 0.35rem;
}

.cases-strip span {
  font-size: 0.88rem;
  color: var(--text-muted);
}

.contact-inner {
  padding: clamp(2.25rem, 5vh, 3.5rem) clamp(1.75rem, 4vw, 3rem);
  border-radius: calc(var(--radius) + 4px);
  border: 1px solid var(--border);
  background: linear-gradient(
    135deg,
    color-mix(in oklab, var(--bg-elev) 64%, transparent),
    color-mix(in oklab, var(--bg-elev) 50%, transparent)
  );
  backdrop-filter: blur(20px) saturate(145%);
  -webkit-backdrop-filter: blur(20px) saturate(145%);
}

.contact-inner h2 {
  margin: 0 0 clamp(0.85rem, 2vh, 1.15rem);
  font-family: var(--font-display);
  font-size: clamp(1.65rem, 3vw, 2.1rem);
}

.contact-inner p {
  margin: 0 0 0.65rem;
  color: var(--text-muted);
  line-height: 1.75;
}

.contact-inner a {
  color: var(--accent);
  text-decoration: none;
}

.contact-inner a:hover {
  text-decoration: underline;
}

.contact-inner .fine {
  margin-top: 1.5rem;
  font-size: 0.8rem;
  color: var(--text-muted);
}

@keyframes fade-up {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 768px) {
  .nav-toggle {
    display: block;
  }

  .site-nav {
    position: fixed;
    inset: 0;
    top: 3.75rem;
    flex-direction: column;
    align-items: stretch;
    padding: 1.25rem;
    gap: 0;
    background: color-mix(in oklab, var(--bg) 78%, transparent);
    backdrop-filter: blur(18px) saturate(140%);
    -webkit-backdrop-filter: blur(18px) saturate(140%);
    border-top: 1px solid var(--border);
    transform: translateY(-100%);
    opacity: 0;
    pointer-events: none;
    transition: transform 0.35s var(--ease), opacity 0.35s var(--ease);
  }

  .site-nav.is-open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .site-nav a {
    padding: 1rem 0;
    border-bottom: 1px solid var(--border);
  }

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

  .about-grid,
  .cases-strip {
    grid-template-columns: 1fr;
  }
}