:root {
  --bg: #050505;
  --ink: #f7f4ed;
  --muted: #a8a39a;
  --soft: #d7d1c3;
  --paper: #f2eee4;
  --paper-ink: #111;
  --line: rgba(247, 244, 237, 0.16);
  --panel: #10100f;
  --green: #b8c8a3;
  --max: 1180px;
  --display-font: "Noto Serif SC", "STZhongsong", "华文中宋", "Noto Serif CJK SC", "Source Han Serif SC", "STSong", serif;
  --sans-font: "Inter", "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", Arial, sans-serif;
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-soft: cubic-bezier(0.2, 0.8, 0.2, 1);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  background:
    radial-gradient(circle at 18% 6%, rgba(184, 200, 163, 0.12), transparent 28%),
    linear-gradient(180deg, #050505 0%, #080806 48%, #050505 100%);
  color: var(--ink);
  font-family: var(--sans-font);
  line-height: 1.6;
  letter-spacing: 0;
}

a {
  color: inherit;
  text-decoration: none;
}

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

button {
  font: inherit;
}

.progress {
  position: fixed;
  z-index: 100;
  top: 0;
  left: 0;
  width: 0%;
  height: 2px;
  background: var(--ink);
}

.site-header {
  position: fixed;
  z-index: 90;
  top: 0;
  left: 0;
  right: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px clamp(18px, 4vw, 56px);
  background: linear-gradient(180deg, rgba(5, 5, 5, 0.88), rgba(5, 5, 5, 0.3));
  backdrop-filter: blur(16px);
}

.brand {
  font-family: var(--display-font);
  font-size: 18px;
  font-weight: 700;
}

.nav {
  display: flex;
  gap: clamp(12px, 1.8vw, 26px);
  color: rgba(247, 244, 237, 0.72);
  font-size: 14px;
  white-space: nowrap;
}

.nav a {
  position: relative;
  padding: 5px 0;
}

.nav a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 220ms ease;
}

.nav a:hover::after {
  transform: scaleX(1);
  transform-origin: left;
}

.screen {
  max-width: var(--max);
  margin: 0 auto;
  padding: clamp(54px, 6vw, 86px) clamp(18px, 4vw, 36px);
}

.hero {
  min-height: 100svh;
  max-width: 1440px;
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(420px, 1.05fr);
  gap: clamp(28px, 5vw, 80px);
  align-items: center;
  padding-top: 116px;
  padding-bottom: 56px;
  overflow: hidden;
}

.eyebrow {
  margin: 0 0 16px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.hero-title {
  margin: 0;
  font-family: var(--display-font);
  font-size: clamp(72px, 12vw, 164px);
  font-weight: 650;
  line-height: 0.98;
  letter-spacing: 0.02em;
}

.hero-title span {
  display: block;
}

.hero-title span + span {
  max-width: 8.6em;
  margin-top: 14px;
  color: var(--soft);
  font-size: clamp(34px, 5vw, 72px);
  font-weight: 350;
  letter-spacing: 0.035em;
}

.hero-inline-photo {
  display: none;
  margin: 22px 0 0;
  width: min(100%, 440px);
  padding: 6px;
  overflow: hidden;
  border: 1px solid rgba(247, 244, 237, 0.18);
  border-radius: 4px;
  background: linear-gradient(135deg, rgba(247, 244, 237, 0.08), rgba(247, 244, 237, 0.025));
  transform: none;
  box-shadow: 0 18px 56px rgba(0, 0, 0, 0.28);
}

.hero-inline-photo img {
  width: 100%;
  border-radius: 2px;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  filter: saturate(0.9) contrast(0.98) brightness(0.96) sepia(0.04);
}

.hero-subtitle {
  max-width: 630px;
  margin: 30px 0 0;
  color: rgba(247, 244, 237, 0.76);
  font-size: clamp(17px, 1.5vw, 21px);
}

.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 26px;
}

.tag-cloud span {
  border: 1px solid rgba(247, 244, 237, 0.16);
  padding: 7px 10px;
  color: rgba(247, 244, 237, 0.72);
  background: rgba(247, 244, 237, 0.04);
  font-size: 13px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  border: 1px solid var(--ink);
  cursor: pointer;
  transition:
    transform 220ms ease,
    background 220ms ease,
    color 220ms ease;
}

.button:hover {
  transform: translateY(-2px);
}

.button-primary {
  background: var(--ink);
  color: var(--paper-ink);
}

.button-ghost {
  background: transparent;
  color: var(--ink);
}

.hero-gallery {
  position: relative;
  min-height: 680px;
  transform: translate3d(var(--hero-x, 0px), calc(var(--portrait-shift, 0px) + var(--hero-y, 0px)), 0);
  transition: transform 160ms linear;
  will-change: transform;
}

.hero-gallery::before {
  content: "";
  position: absolute;
  inset: 11% 8% 12% 15%;
  border: 1px solid rgba(247, 244, 237, 0.16);
  transform: rotate(-5deg);
}

.hero-photo {
  position: absolute;
  margin: 0;
  overflow: hidden;
  background: #111;
  box-shadow: 0 22px 70px rgba(0, 0, 0, 0.36);
}

.hero-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.88) contrast(1.02);
  transition: transform 900ms var(--ease-out), filter 320ms ease;
}

.main-photo {
  right: 7%;
  bottom: 0;
  width: min(52vw, 540px);
  height: min(72vh, 690px);
  background: transparent;
  box-shadow: none;
}

.main-photo img {
  object-fit: contain;
}

.side-photo {
  border: 10px solid var(--paper);
}

.top-photo {
  top: 5%;
  left: 4%;
  width: 286px;
  height: 190px;
  transform: rotate(-4deg);
}

.hero-note {
  position: absolute;
  right: 0;
  top: 18%;
  writing-mode: vertical-rl;
  color: rgba(247, 244, 237, 0.48);
  letter-spacing: 0.16em;
  font-size: 12px;
}

.section-head {
  display: grid;
  grid-template-columns: 180px minmax(0, 1fr) minmax(260px, 0.62fr);
  gap: clamp(20px, 4vw, 54px);
  align-items: end;
  margin-bottom: 38px;
}

.section-head h2,
.feature-article h2,
.contact-copy h2 {
  margin: 0;
  font-family: var(--display-font);
  font-size: clamp(38px, 6vw, 82px);
  font-weight: 650;
  line-height: 1.08;
  letter-spacing: 0.018em;
}

.section-head p:last-child,
.feature-article p,
.contact-copy p {
  margin: 0;
  color: rgba(247, 244, 237, 0.68);
  font-size: clamp(16px, 1.4vw, 19px);
}

.timeline-screen,
.works-screen,
.partners-screen,
.contact-screen {
  border-top: 1px solid var(--line);
}

.timeline-screen {
  padding-bottom: clamp(24px, 3vw, 44px);
}

.timeline-screen .eyebrow {
  color: rgba(247, 244, 237, 0.58);
  font-family: Georgia, "Times New Roman", serif;
  font-size: 13px;
  font-style: italic;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: none;
}

.timeline-screen .section-head p:last-child {
  max-width: 360px;
  color: rgba(247, 244, 237, 0.6);
  font-family: var(--display-font);
  font-size: clamp(15px, 1.25vw, 18px);
  font-weight: 350;
  line-height: 1.9;
}

.timeline-layout {
  display: grid;
  grid-template-columns: minmax(260px, 0.52fr) minmax(0, 1fr);
  gap: clamp(28px, 5vw, 66px);
  align-items: start;
}

.timeline-photos {
  display: block;
}

.timeline-photos figure {
  position: relative;
  margin: 0;
  overflow: hidden;
  border: 1px solid rgba(247, 244, 237, 0.14);
  background: #111;
  aspect-ratio: 16 / 10;
}

.timeline-photos img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 50% 42%;
  filter: saturate(0.72) contrast(1.04) sepia(0.1);
  transition: transform 900ms var(--ease-out), filter 320ms ease;
}

.timeline-photos figcaption {
  position: absolute;
  left: 12px;
  bottom: 10px;
  color: var(--ink);
  font-family: Georgia, "Times New Roman", serif;
  font-size: 12px;
  font-style: italic;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: none;
}

.timeline-track {
  position: relative;
  display: grid;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid rgba(247, 244, 237, 0.2);
  background:
    linear-gradient(90deg, rgba(247, 244, 237, 0.035) 1px, transparent 1px),
    linear-gradient(180deg, rgba(247, 244, 237, 0.025) 1px, transparent 1px);
  background-size: 72px 72px;
}

.timeline-track::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 112px;
  width: 2px;
  background:
    linear-gradient(180deg, rgba(247, 244, 237, 0), var(--green) 16%, rgba(247, 244, 237, 0.42) 50%, var(--green) 84%, rgba(247, 244, 237, 0)),
    repeating-linear-gradient(180deg, transparent 0 12px, rgba(247, 244, 237, 0.55) 12px 16px);
  box-shadow: 0 0 26px rgba(184, 200, 163, 0.18);
}

.timeline-track li {
  position: relative;
  display: grid;
  grid-template-columns: 132px minmax(0, 1fr);
  gap: 24px;
  align-items: baseline;
  padding: 22px 0 22px 0;
  border-bottom: 1px solid var(--line);
}

.timeline-track li::before {
  content: "";
  position: absolute;
  z-index: 2;
  left: 105px;
  top: 30px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--green);
  border: 3px solid #10100f;
  box-shadow: 0 0 0 1px rgba(247, 244, 237, 0.28), 0 0 24px rgba(184, 200, 163, 0.24);
}

.timeline-track li::after {
  content: "";
  position: absolute;
  left: 121px;
  top: 38px;
  width: clamp(42px, 7vw, 92px);
  height: 1px;
  background: linear-gradient(90deg, rgba(184, 200, 163, 0.82), rgba(247, 244, 237, 0));
}

.timeline-track time {
  position: relative;
  color: var(--muted);
  font-family: Georgia, "Times New Roman", serif;
  font-size: 14px;
  font-style: italic;
  font-weight: 500;
}

.timeline-track span {
  position: relative;
  font-family: var(--display-font);
  color: rgba(247, 244, 237, 0.9);
  font-size: clamp(18px, 1.85vw, 25px);
  font-weight: 350;
  line-height: 1.42;
}

.timeline-track span::before {
  content: "0" counter(timeline);
  counter-increment: timeline;
  position: absolute;
  right: calc(100% + 18px);
  top: -18px;
  color: rgba(247, 244, 237, 0.18);
  font-family: Georgia, "Times New Roman", serif;
  font-size: 26px;
  font-style: italic;
  font-weight: 400;
}

.timeline-track {
  counter-reset: timeline;
}

.writing-screen {
  padding-top: clamp(18px, 2.8vw, 34px);
  padding-bottom: clamp(42px, 5vw, 72px);
}

.works-screen,
.partners-screen,
.products-screen,
.contact-screen {
  padding-top: clamp(42px, 5vw, 72px);
}

.works-screen,
.partners-screen,
.products-screen {
  padding-bottom: clamp(44px, 5vw, 76px);
}

.feature-article {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(360px, 0.7fr);
  gap: clamp(28px, 6vw, 78px);
  align-items: center;
  padding: clamp(28px, 5vw, 60px);
  border: 1px solid var(--line);
  background: rgba(247, 244, 237, 0.045);
}

.feature-article p {
  max-width: 620px;
  margin: 22px 0 30px;
}

.article-list {
  display: grid;
  gap: 14px;
}

.article-item {
  position: relative;
  display: block;
  padding: 20px 0;
  border-top: 1px solid rgba(247, 244, 237, 0.14);
  overflow: hidden;
  transition: color 260ms ease;
}

.article-item::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: rgba(247, 244, 237, 0.48);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 420ms var(--ease-out);
}

.article-item:last-child {
  border-bottom: 1px solid rgba(247, 244, 237, 0.14);
}

.article-item span {
  display: block;
  margin-bottom: 8px;
  color: rgba(247, 244, 237, 0.38);
  font-family: Georgia, "Times New Roman", serif;
  font-size: 18px;
  font-style: italic;
  transition: color 260ms ease, transform 260ms ease;
}

.article-item h2 {
  max-width: 760px;
  font-size: clamp(30px, 3.1vw, 46px);
  line-height: 1.18;
  font-weight: 560;
  transition: transform 360ms var(--ease-out), color 260ms ease;
}

.article-item p {
  margin: 16px 0 18px;
  max-width: 620px;
}

.article-item strong {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
}

.article-item strong::after {
  content: "→";
  transition: transform 260ms ease;
}

.article-item:hover span {
  color: rgba(247, 244, 237, 0.72);
  transform: translateX(4px);
}

.article-item:hover h2 {
  transform: translateX(10px);
}

.article-item:hover strong::after {
  transform: translateX(6px);
}

.article-item:hover::after {
  transform: scaleX(1);
}

.article-item-pending {
  color: rgba(247, 244, 237, 0.72);
}

.feature-article figure {
  margin: 0;
  overflow: hidden;
  aspect-ratio: 4 / 3;
}

.feature-article img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 900ms var(--ease-out), filter 320ms ease;
}

.feature-article:hover img {
  transform: scale(1.025);
  filter: saturate(0.92) contrast(1.02) brightness(1.02);
}

.showcase-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}

.showcase-card,
.product-card {
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(247, 244, 237, 0.16);
  background: var(--paper);
  color: var(--paper-ink);
  transition:
    transform 320ms var(--ease-out),
    border-color 260ms ease,
    background 260ms ease,
    box-shadow 320ms ease;
}

.showcase-card:hover,
.product-card:hover {
  transform: translateY(-5px);
  border-color: rgba(247, 244, 237, 0.5);
  box-shadow: 0 18px 48px rgba(0, 0, 0, 0.22);
}

.showcase-card {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  min-height: 290px;
}

.showcase-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 900ms var(--ease-out), filter 320ms ease;
}

.book-card img {
  width: 220px;
  height: 290px;
  object-fit: contain;
  padding: 18px;
  background: #111;
}

.book-card:nth-child(2) img {
  object-fit: cover;
  padding: 0;
}

.podcast-card {
  grid-column: 1 / -1;
  display: block;
  min-height: 360px;
  background:
    linear-gradient(90deg, rgba(8, 8, 8, 0.9), rgba(8, 8, 8, 0.52) 48%, rgba(8, 8, 8, 0.12)),
    linear-gradient(0deg, rgba(8, 8, 8, 0.28), rgba(8, 8, 8, 0)),
    url("./图片/微信图片_20260519165751_7236_1005.jpg") center / 100% no-repeat #111;
  color: var(--ink);
  transition:
    transform 320ms var(--ease-out),
    border-color 260ms ease,
    background-size 900ms var(--ease-out),
    box-shadow 320ms ease;
}

.podcast-card::after {
  content: "";
  position: absolute;
  inset: 0;
  border: 1px solid rgba(247, 244, 237, 0.2);
  background: rgba(247, 244, 237, 0);
  transition: background 320ms ease, border-color 320ms ease;
  pointer-events: none;
}

.showcase-card:hover img {
  transform: scale(1.03);
  filter: saturate(0.94) contrast(1.03);
}

.podcast-card:hover {
  background-size: 103%;
}

.podcast-card:hover::after {
  border-color: rgba(247, 244, 237, 0.38);
  background: rgba(247, 244, 237, 0.035);
}

.showcase-card div {
  padding: 30px;
}

.podcast-card div {
  position: relative;
  z-index: 1;
  display: flex;
  min-height: 360px;
  max-width: 520px;
  flex-direction: column;
  justify-content: flex-end;
  padding: clamp(30px, 5vw, 58px);
}

.podcast-card p {
  max-width: 360px;
}

.showcase-card span,
.product-card span {
  display: block;
  margin-bottom: 14px;
  color: currentColor;
  opacity: 0.56;
  font-size: 13px;
  font-weight: 800;
}

.showcase-card h3,
.product-card h3,
.product-card h4 {
  margin: 0;
  font-family: var(--display-font);
  font-size: clamp(26px, 3vw, 38px);
  font-weight: 620;
  line-height: 1.18;
  letter-spacing: 0.012em;
}

.product-card h4 {
  font-size: clamp(22px, 2.1vw, 30px);
}

.showcase-card p,
.product-card p {
  margin: 20px 0 32px;
  color: currentColor;
  opacity: 0.68;
}

.showcase-card strong,
.product-card strong,
.service-card a {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-weight: 800;
}

.showcase-card strong::after,
.product-card strong::after,
.service-card a::after {
  content: "→";
  transition: transform 260ms ease;
}

.showcase-card:hover strong::after,
.product-card:hover strong::after,
.service-card:hover a::after {
  transform: translateX(6px);
}

.brand-wall {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  border-top: 1px solid rgba(247, 244, 237, 0.18);
  border-left: 1px solid rgba(247, 244, 237, 0.18);
}

.brand-card {
  position: relative;
  display: flex;
  min-height: 210px;
  flex-direction: column;
  justify-content: center;
  overflow: hidden;
  border-right: 1px solid rgba(247, 244, 237, 0.18);
  border-bottom: 1px solid rgba(247, 244, 237, 0.18);
  padding: 26px 22px;
  background:
    linear-gradient(135deg, rgba(247, 244, 237, 0.06), rgba(247, 244, 237, 0.015)),
    #090909;
  transition:
    transform 320ms var(--ease-out),
    background 320ms ease,
    border-color 320ms ease;
}

.brand-card::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 26px;
  height: 1px;
  width: 54px;
  background: rgba(247, 244, 237, 0.28);
  transform: translateX(-50%) scaleX(0.34);
  transform-origin: center;
  transition: transform 420ms var(--ease-out), background 320ms ease;
}

.brand-card span {
  position: absolute;
  left: 22px;
  top: 22px;
  color: rgba(247, 244, 237, 0.46);
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.brand-logo {
  position: relative;
  z-index: 1;
  display: grid;
  min-height: 86px;
  place-items: center;
  gap: 10px;
  color: rgba(247, 244, 237, 0.92);
  text-align: center;
  transition: transform 420ms var(--ease-out), color 320ms ease;
}

.brand-logo strong {
  font-size: clamp(24px, 2.4vw, 34px);
  font-weight: 420;
  line-height: 1.12;
  letter-spacing: 0.04em;
}

.narwal-logo {
  grid-template-columns: auto auto;
}

.narwal-logo .logo-symbol {
  position: static;
  display: inline-grid;
  width: 42px;
  height: 42px;
  place-items: center;
  border: 1px solid rgba(247, 244, 237, 0.46);
  border-radius: 50%;
  color: var(--ink);
  font-family: Georgia, "Times New Roman", serif;
  font-size: 18px;
  font-weight: 500;
  letter-spacing: 0;
}

.narwal-logo strong,
.pause-logo strong,
.tingwu-logo strong {
  font-family: var(--display-font);
}

.pause-bars {
  width: 42px;
  height: 42px;
  border: 1px solid rgba(247, 244, 237, 0.42);
  border-radius: 50%;
  background:
    linear-gradient(90deg, transparent 0 30%, currentColor 30% 39%, transparent 39% 61%, currentColor 61% 70%, transparent 70% 100%);
  opacity: 0.86;
}

.wave-mark {
  width: 78px;
  height: 22px;
  background:
    radial-gradient(circle at 8px 11px, currentColor 0 2px, transparent 2.5px),
    radial-gradient(circle at 24px 11px, currentColor 0 4px, transparent 4.5px),
    radial-gradient(circle at 42px 11px, currentColor 0 7px, transparent 7.5px),
    radial-gradient(circle at 62px 11px, currentColor 0 4px, transparent 4.5px);
  opacity: 0.78;
}

.tingwu-logo {
  align-content: center;
  gap: 6px;
  transform: translateY(4px);
}

.tingwu-logo .wave-mark {
  order: 2;
  margin-top: -6px;
}

.tingwu-logo strong {
  order: 1;
}

.tingwu-logo em {
  order: 3;
  margin-top: -8px;
  color: rgba(247, 244, 237, 0.54);
  font-family: Georgia, "Times New Roman", serif;
  font-size: 18px;
  font-style: italic;
  letter-spacing: 0.2em;
}

.ysl-logo strong {
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(44px, 4.8vw, 72px);
  font-weight: 400;
  letter-spacing: -0.02em;
}

.oppo-logo strong {
  display: inline-flex;
  max-width: min(100%, 260px);
  align-items: center;
  justify-content: center;
  padding: 7px 18px 8px;
  border: 2px solid rgba(247, 244, 237, 0.82);
  border-radius: 999px;
  font-family: var(--sans-font);
  font-size: clamp(28px, 3vw, 46px);
  font-weight: 600;
  letter-spacing: 0.1em;
  line-height: 1;
}

.brand-card:hover {
  z-index: 1;
  transform: translateY(-6px);
  border-color: rgba(247, 244, 237, 0.38);
  background:
    linear-gradient(135deg, rgba(247, 244, 237, 0.12), rgba(247, 244, 237, 0.03)),
    #0f0f0f;
}

.brand-card:hover::after {
  background: var(--green);
  transform: translateX(-50%) scaleX(1);
}

.brand-card:hover .brand-logo {
  color: var(--ink);
  transform: translateY(-5px);
}

.product-layout {
  display: block;
}

.product-groups {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.product-group {
  display: grid;
  grid-template-rows: auto 1fr;
  gap: 12px;
  border-top: 1px solid rgba(247, 244, 237, 0.22);
  padding-top: 18px;
  transition: border-color 320ms ease, transform 320ms var(--ease-out);
}

.product-group-head {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 14px;
  align-items: baseline;
}

.product-group-head span {
  color: rgba(247, 244, 237, 0.5);
  font-size: 13px;
  font-weight: 800;
  transition: color 260ms ease, transform 260ms ease;
}

.product-group-head h3 {
  margin: 0;
  font-family: var(--display-font);
  font-size: clamp(28px, 3vw, 42px);
  font-weight: 560;
  letter-spacing: 0.012em;
  transition: color 260ms ease, transform 320ms var(--ease-out);
}

.product-group:hover {
  border-color: rgba(247, 244, 237, 0.48);
}

.product-group:hover .product-group-head span {
  color: var(--green);
  transform: translateY(-2px);
}

.product-group:hover .product-group-head h3 {
  transform: translateX(6px);
}

.product-group-items {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.product-group:nth-child(3) {
  grid-column: 1 / -1;
  width: min(100%, 720px);
  justify-self: center;
}

.service-group {
  grid-column: 1 / -1;
  grid-template-columns: minmax(220px, 0.34fr) minmax(0, 1fr);
  grid-template-rows: auto;
  align-items: stretch;
}

.service-group .product-group-head {
  align-content: start;
}

.service-group .product-card {
  min-height: 220px;
}

.product-card {
  display: flex;
  flex-direction: column;
  width: 100%;
  min-height: 260px;
  padding: 24px;
}

.product-card.dark,
.service-card {
  background: #111;
  color: var(--ink);
}

.product-card span,
.product-card h3,
.product-card h4,
.product-card p,
.product-card strong,
.service-card a {
  margin-left: 0;
  margin-right: 0;
}

.product-card span {
  margin-top: 0;
}

.product-card strong,
.service-card a {
  margin-top: auto;
  margin-bottom: 0;
}

.knowledge-card {
  align-items: center;
  justify-content: center;
  text-align: center;
}

.knowledge-card::before,
.knowledge-card::after {
  content: "";
  display: block;
  width: 56px;
  height: 1px;
  background: rgba(247, 244, 237, 0.42);
}

.knowledge-card::before {
  margin-bottom: 22px;
}

.knowledge-card::after {
  margin-top: 22px;
}

.knowledge-card p {
  max-width: 320px;
}

.knowledge-card strong {
  margin-top: 6px;
}

.contact-screen {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(340px, 0.72fr);
  gap: clamp(30px, 7vw, 90px);
  align-items: start;
}

.contact-screen::before {
  content: "write / connect / begin";
  position: absolute;
  top: 56px;
  right: clamp(18px, 4vw, 36px);
  color: rgba(247, 244, 237, 0.18);
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(28px, 4vw, 56px);
  font-style: italic;
  letter-spacing: 0;
  pointer-events: none;
}

.contact-copy p {
  max-width: 600px;
  margin-top: 22px;
}

.contact-panel {
  position: relative;
  padding: 18px;
  border: 1px solid rgba(247, 244, 237, 0.22);
  background:
    linear-gradient(135deg, rgba(242, 238, 228, 0.08), rgba(242, 238, 228, 0.02)),
    rgba(247, 244, 237, 0.04);
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.22);
}

.contact-panel::before {
  content: "Songyue";
  display: block;
  margin: 0 0 18px;
  color: rgba(247, 244, 237, 0.42);
  font-family: Georgia, "Times New Roman", serif;
  font-size: 32px;
  font-style: italic;
  line-height: 1;
}

.contact-row {
  display: grid;
  grid-template-columns: 100px minmax(0, 1fr);
  gap: 18px;
  align-items: center;
  margin: 0 -10px;
  padding: 17px 10px;
  border-bottom: 1px solid rgba(247, 244, 237, 0.13);
  transition: background 260ms ease, border-color 260ms ease, transform 260ms var(--ease-out);
}

.contact-row:last-child {
  border-bottom: 0;
}

.contact-row span {
  color: var(--muted);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.contact-row strong {
  overflow-wrap: anywhere;
  font-family: Georgia, "Times New Roman", "Songti SC", "SimSun", serif;
  font-size: clamp(20px, 2vw, 28px);
  font-weight: 500;
}

.contact-row:hover {
  background: rgba(247, 244, 237, 0.055);
  border-color: rgba(247, 244, 237, 0.28);
  transform: translateX(4px);
}

.wechat {
  grid-template-columns: 100px minmax(0, 1fr) auto;
}

.copy-button {
  border: 1px solid rgba(247, 244, 237, 0.24);
  background: var(--ink);
  color: var(--paper-ink);
  padding: 8px 13px;
  cursor: pointer;
  transition: transform 220ms ease, background 220ms ease;
}

.copy-button:hover {
  transform: translateY(-2px);
}

.footer {
  max-width: var(--max);
  margin: 0 auto;
  padding: 20px clamp(18px, 4vw, 36px) 42px;
  display: flex;
  justify-content: space-between;
  gap: 18px;
  color: rgba(247, 244, 237, 0.46);
  font-size: 13px;
}

html.js .reveal {
  opacity: 0;
  transform: translateY(24px);
  transition:
    opacity 720ms var(--ease-soft),
    transform 720ms var(--ease-out);
}

html.js .reveal.in-view,
.reveal {
  opacity: 1;
  transform: translateY(0);
}

html.js .motion-section > .section-head,
html.js .motion-section > .timeline-layout,
html.js .motion-section > .feature-article,
html.js .motion-section > .showcase-grid,
html.js .motion-section > .product-layout,
html.js .motion-section > .contact-copy,
html.js .motion-section > .contact-panel {
  opacity: 0;
  transform: translateY(28px);
  transition:
    opacity 720ms var(--ease-soft),
    transform 720ms var(--ease-out);
}

html.js .motion-section.section-in-view > .section-head,
html.js .motion-section.section-in-view > .timeline-layout,
html.js .motion-section.section-in-view > .feature-article,
html.js .motion-section.section-in-view > .showcase-grid,
html.js .motion-section.section-in-view > .product-layout,
html.js .motion-section.section-in-view > .contact-copy,
html.js .motion-section.section-in-view > .contact-panel {
  opacity: 1;
  transform: translateY(0);
}

html.js .motion-section.section-in-view > .timeline-layout,
html.js .motion-section.section-in-view > .showcase-grid,
html.js .motion-section.section-in-view > .product-layout,
html.js .motion-section.section-in-view > .contact-panel {
  transition-delay: 120ms;
}

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

  *,
  *::before,
  *::after {
    transition-duration: 1ms !important;
    animation-duration: 1ms !important;
    scroll-behavior: auto !important;
  }

  html.js .reveal,
  html.js .motion-section > .section-head,
  html.js .motion-section > .timeline-layout,
  html.js .motion-section > .feature-article,
  html.js .motion-section > .showcase-grid,
  html.js .motion-section > .product-layout,
  html.js .motion-section > .contact-copy,
  html.js .motion-section > .contact-panel {
    opacity: 1 !important;
    transform: none !important;
  }
}

@media (max-width: 980px) {
  .site-header {
    align-items: flex-start;
    padding: 15px 18px;
  }

  .nav {
    max-width: 285px;
    justify-content: flex-end;
    flex-wrap: wrap;
    gap: 7px 13px;
    font-size: 13px;
  }

  .hero,
  .feature-article,
  .contact-screen {
    grid-template-columns: 1fr;
  }

  .hero {
    padding-top: 112px;
  }

  .hero-inline-photo {
    display: block;
  }

  .hero-gallery {
    display: none;
  }

  .main-photo {
    right: 2%;
    width: min(92vw, 470px);
    height: 520px;
  }

  .top-photo {
    width: 190px;
    height: 128px;
  }

  .section-head {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .timeline-layout {
    grid-template-columns: 1fr;
  }

  .timeline-photos {
    display: block;
  }

  .showcase-grid,
  .showcase-card,
  .podcast-card {
    grid-template-columns: 1fr;
  }

  .showcase-card img {
    aspect-ratio: 4 / 3;
    height: auto;
  }

  .podcast-card {
    min-height: 390px;
    background:
      linear-gradient(180deg, rgba(8, 8, 8, 0.22), rgba(8, 8, 8, 0.88)),
      linear-gradient(90deg, rgba(8, 8, 8, 0.7), rgba(8, 8, 8, 0.18)),
      url("./图片/微信图片_20260519165751_7236_1005.jpg") center / cover no-repeat #111;
  }

  .podcast-card::after {
    border-color: rgba(247, 244, 237, 0.18);
  }

  .podcast-card div {
    min-height: 390px;
    padding: 28px;
  }

  .book-card img {
    width: 100%;
    height: 260px;
    max-height: none;
    aspect-ratio: auto;
    background: #111;
  }

  .brand-wall {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .brand-card {
    min-height: 170px;
  }

  .product-groups,
  .product-group-items,
  .service-group {
    grid-template-columns: 1fr;
  }

  .service-group {
    gap: 12px;
  }

  .wechat {
    grid-template-columns: 100px minmax(0, 1fr);
  }

  .copy-button {
    grid-column: 2;
    width: fit-content;
  }
}

@media (max-width: 560px) {
  .screen {
    padding-left: 16px;
    padding-right: 16px;
  }

  .hero-title {
    font-size: clamp(54px, 16vw, 84px);
  }

  .hero-title span + span {
    font-size: clamp(29px, 8.6vw, 44px);
  }

  .top-photo {
    width: 176px;
    height: 118px;
    border-width: 7px;
  }

  .timeline-track::before {
    left: 0;
  }

  .timeline-track li {
    grid-template-columns: 1fr;
    gap: 4px;
    padding-left: 18px;
  }

  .timeline-track li::before {
    left: -4px;
  }

  .timeline-track li::after {
    left: 13px;
    width: 42px;
  }

  .timeline-track span::before {
    display: none;
  }

  .hero-note {
    display: none;
  }

  .feature-article {
    padding: 22px;
  }

  .article-item h2 {
    font-size: clamp(26px, 8vw, 34px);
  }

  .brand-wall {
    grid-template-columns: 1fr;
  }

  .brand-card {
    min-height: 140px;
  }

  .contact-row,
  .wechat {
    grid-template-columns: 1fr;
    gap: 5px;
  }

  .copy-button {
    grid-column: auto;
  }

  .footer {
    display: block;
  }

  .footer span {
    display: block;
  }
}