:root {
  color-scheme: light;
  --paper: #f6f5f1;
  --ink: #111111;
  --muted: #686868;
  --line: #d8d6cf;
  --fine-line: rgba(17, 17, 17, 0.22);
}

* {
  box-sizing: border-box;
}

html {
  min-height: 100%;
}

body {
  min-height: 100vh;
  margin: 0;
  background:
    linear-gradient(90deg, rgba(17, 17, 17, 0.035) 1px, transparent 1px),
    linear-gradient(180deg, rgba(17, 17, 17, 0.025) 1px, transparent 1px),
    radial-gradient(circle at 82% 18%, rgba(17, 17, 17, 0.055), transparent 24%),
    linear-gradient(135deg, transparent 0 49.92%, rgba(17, 17, 17, 0.055) 50%, transparent 50.08%),
    var(--paper);
  background-size: 80px 80px, 80px 80px, auto, auto, auto;
  color: var(--ink);
  font-family: "Helvetica Neue", Arial, "Noto Sans SC", "Microsoft YaHei", sans-serif;
  letter-spacing: 0;
}

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

.home {
  position: relative;
  display: grid;
  grid-template-rows: auto 1fr auto;
  min-height: 100vh;
  padding: clamp(22px, 4vw, 46px);
  overflow: hidden;
}

.home::before,
.home::after {
  position: absolute;
  z-index: 0;
  width: 1px;
  height: calc(100% - clamp(44px, 8vw, 92px));
  top: clamp(22px, 4vw, 46px);
  background: rgba(17, 17, 17, 0.12);
  content: "";
}

.home::before {
  left: clamp(22px, 4vw, 46px);
}

.home::after {
  right: clamp(22px, 4vw, 46px);
}

.site-header,
.hero,
.site-nav {
  position: relative;
  z-index: 1;
}

.site-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  min-height: 72px;
  gap: 24px;
}

.brand {
  display: inline-grid;
  line-height: 1;
  padding-top: 2px;
}

.brand-cn {
  color: var(--ink);
  font-size: clamp(28px, 3vw, 46px);
  font-weight: 500;
  letter-spacing: 0.08em;
}

.side-note {
  position: absolute;
  z-index: 1;
  top: 50%;
  color: rgba(17, 17, 17, 0.42);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.24em;
  writing-mode: vertical-rl;
}

.side-note-left {
  left: clamp(10px, 1.7vw, 24px);
  transform: translateY(-50%) rotate(180deg);
}

.side-note-right {
  right: clamp(10px, 1.7vw, 24px);
  transform: translateY(-50%);
}

.hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(230px, 32%);
  align-items: end;
  gap: clamp(24px, 5vw, 76px);
  align-self: center;
  width: min(100%, 1280px);
  margin: 0 auto;
  padding: 6vh 0 8vh;
  text-align: left;
}

.hero::before {
  position: absolute;
  right: 6%;
  bottom: clamp(30px, 6vw, 88px);
  left: 4%;
  height: 1px;
  background: var(--fine-line);
  content: "";
}

.hero-mark {
  position: absolute;
  z-index: -1;
  top: 48%;
  left: 50%;
  color: transparent;
  font-family: "Microsoft YaHei", "Noto Sans SC", sans-serif;
  font-size: clamp(86px, 14vw, 190px);
  font-weight: 700;
  letter-spacing: 0.12em;
  opacity: 0.18;
  transform: translate(-50%, -50%);
  -webkit-text-stroke: 1px rgba(17, 17, 17, 0.45);
  text-stroke: 1px rgba(17, 17, 17, 0.45);
  white-space: nowrap;
}

h1 {
  display: grid;
  gap: 0;
  margin: 0;
  font-size: clamp(92px, 16.5vw, 238px);
  font-weight: 500;
  line-height: 0.76;
  letter-spacing: 0.015em;
}

h1 span {
  display: block;
}

h1 span:last-child {
  margin-left: clamp(42px, 9vw, 132px);
}

.identity {
  display: grid;
  gap: clamp(18px, 2.8vw, 32px);
  justify-items: start;
  width: min(100%, 440px);
  padding-bottom: clamp(10px, 2vw, 30px);
  padding-left: clamp(16px, 2vw, 26px);
  border-left: 1px solid var(--fine-line);
}

.identity p {
  display: grid;
  gap: 8px;
  margin: 0;
}

.identity span:first-child {
  font-size: clamp(21px, 2vw, 31px);
  font-weight: 500;
  line-height: 1.25;
}

.identity span:last-child {
  color: var(--muted);
  font-size: clamp(16px, 1.35vw, 20px);
  line-height: 1.45;
}

.site-nav {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: rgba(246, 245, 241, 0.68);
  backdrop-filter: blur(10px);
}

.site-nav a {
  position: relative;
  display: grid;
  min-height: 96px;
  align-content: center;
  justify-items: center;
  gap: 9px;
  padding: 16px clamp(8px, 1.6vw, 22px);
  border-right: 1px solid var(--line);
  transition: background-color 160ms ease, color 160ms ease;
  text-align: center;
}

.site-nav a::before {
  position: absolute;
  top: -1px;
  right: 0;
  left: 0;
  height: 3px;
  background: var(--ink);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 180ms ease;
  content: "";
}

.site-nav a:first-child {
  border-left: 1px solid var(--line);
}

.site-nav a span:first-child {
  font-size: clamp(14px, 1.35vw, 20px);
  font-weight: 500;
  letter-spacing: 0.08em;
  white-space: nowrap;
}

.site-nav a span:last-child {
  color: var(--muted);
  font-size: clamp(14px, 1.2vw, 18px);
}

.site-nav a:hover,
.site-nav a:focus-visible {
  background: var(--ink);
  color: var(--paper);
  outline: none;
}

.site-nav a:hover::before,
.site-nav a:focus-visible::before {
  transform: scaleX(1);
}

.site-nav a:hover span:last-child,
.site-nav a:focus-visible span:last-child {
  color: rgba(246, 245, 241, 0.76);
}

@media (max-width: 760px) {
  .home {
    min-height: auto;
    padding: 18px;
  }

  .home::before,
  .home::after {
    display: none;
  }

  .side-note {
    display: none;
  }

  .hero {
    grid-template-columns: 1fr;
    gap: 24px;
    padding: 6vh 0 5vh;
  }

  h1 {
    display: grid;
    gap: 0;
    font-size: clamp(68px, 23vw, 118px);
  }

  h1 span:last-child {
    margin-left: clamp(28px, 14vw, 70px);
  }

  .identity {
    padding-bottom: 0;
    padding-left: 16px;
  }

  .hero-mark {
    top: 42%;
    font-size: clamp(80px, 25vw, 132px);
  }

  .site-nav {
    grid-template-columns: 1fr;
  }

  .site-nav a,
  .site-nav a:first-child {
    min-height: 58px;
    border-right: 1px solid var(--line);
    border-left: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
  }

  .site-nav {
    border-bottom: 0;
  }
}

.research-hero {
  position: relative;
  padding: clamp(42px, 6vw, 78px) 0 clamp(30px, 4.5vw, 56px);
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}

.research-watermark {
  position: absolute;
  right: -0.06em;
  bottom: -0.2em;
  z-index: 0;
  color: transparent;
  font-size: clamp(96px, 18vw, 246px);
  font-weight: 700;
  line-height: 0.82;
  letter-spacing: 0.02em;
  opacity: 0.12;
  -webkit-text-stroke: 1px rgba(17, 17, 17, 0.5);
  text-stroke: 1px rgba(17, 17, 17, 0.5);
  pointer-events: none;
}

.research-hero > div:not(.research-watermark) {
  position: relative;
  z-index: 1;
}

.research-hero h1 {
  margin: 0;
  font-size: clamp(54px, 8vw, 118px);
  font-weight: 500;
  line-height: 0.92;
  letter-spacing: 0.03em;
}

.research-lead {
  max-width: 820px;
  margin: clamp(22px, 3vw, 36px) 0 0;
  color: var(--muted);
  font-size: clamp(16px, 1.35vw, 20px);
  line-height: 1.78;
}

.research-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-left: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.research-stats article {
  display: grid;
  min-height: 144px;
  align-content: space-between;
  padding: clamp(20px, 2.6vw, 34px);
  border-right: 1px solid var(--line);
  background: rgba(246, 245, 241, 0.68);
}

.research-stats article:nth-child(2) {
  background: rgba(17, 17, 17, 0.035);
}

.research-stats strong {
  font-size: clamp(42px, 5vw, 72px);
  font-weight: 500;
  line-height: 0.9;
}

.research-stats span {
  color: var(--muted);
  font-size: clamp(14px, 1.12vw, 17px);
}

.research-section {
  display: grid;
  grid-template-columns: minmax(210px, 0.28fr) minmax(0, 1fr);
  gap: clamp(24px, 4.4vw, 68px);
  padding: clamp(42px, 5.6vw, 78px) 0;
  border-bottom: 1px solid var(--line);
}

.research-section-title {
  position: sticky;
  top: 24px;
  align-self: start;
  padding-left: clamp(16px, 2vw, 26px);
  border-left: 1px solid var(--fine-line);
}

.research-section-title span {
  color: var(--muted);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.16em;
}

.research-section-title h2 {
  margin: 18px 0 0;
  font-size: clamp(26px, 3vw, 48px);
  font-weight: 500;
  line-height: 1.14;
}

.paper-list {
  display: grid;
  gap: clamp(16px, 2.4vw, 28px);
}

.paper-item {
  position: relative;
  padding: clamp(22px, 3vw, 38px);
  border: 1px solid var(--line);
  background: rgba(246, 245, 241, 0.65);
  overflow: hidden;
}

.paper-item::before {
  position: absolute;
  top: 0;
  right: 0;
  left: 0;
  height: 4px;
  background: var(--ink);
  content: "";
  transform: scaleX(0.18);
  transform-origin: left;
}

.paper-item:nth-child(2n) {
  background: rgba(17, 17, 17, 0.032);
}

.paper-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: clamp(18px, 2vw, 26px);
}

.paper-meta span {
  padding: 6px 8px;
  border: 1px solid rgba(17, 17, 17, 0.16);
  color: var(--muted);
  font-size: 12px;
  line-height: 1;
}

.paper-item h3 {
  margin: 0 0 14px;
  max-width: 960px;
  font-size: clamp(19px, 1.7vw, 27px);
  font-weight: 500;
  line-height: 1.38;
}

.paper-item p {
  margin: 0;
  color: var(--muted);
  font-size: clamp(15px, 1.18vw, 18px);
  line-height: 1.75;
}

.paper-insight {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0;
  margin-top: clamp(20px, 2.6vw, 32px);
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.paper-insight div {
  min-height: 128px;
  padding: clamp(16px, 2vw, 24px);
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: rgba(17, 17, 17, 0.02);
}

.paper-insight div:nth-child(2) {
  background: rgba(17, 17, 17, 0.04);
}

.paper-insight span {
  display: block;
  margin-bottom: 14px;
  color: var(--ink);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.paper-insight p {
  margin: 0;
  color: var(--muted);
  font-size: clamp(14px, 1.06vw, 16px);
  line-height: 1.65;
}

@media (max-width: 900px) {
  .research-hero {
    padding: 34px 0 30px;
  }

  .research-watermark {
    right: -0.14em;
    bottom: -0.06em;
    font-size: clamp(90px, 32vw, 168px);
    opacity: 0.08;
  }

  .research-hero h1 {
    font-size: clamp(42px, 14vw, 78px);
  }

  .research-lead {
    font-size: 15px;
  }

  .research-stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .research-stats article {
    min-height: 110px;
  }

  .research-stats strong {
    font-size: clamp(34px, 11vw, 52px);
  }

  .research-section {
    grid-template-columns: 1fr;
    gap: 24px;
    padding: 34px 0;
  }

  .research-section-title {
    position: static;
  }

  .paper-item {
    padding: 20px 16px;
  }

  .paper-insight {
    grid-template-columns: 1fr;
  }

  .paper-insight div {
    min-height: auto;
  }
}

@media (max-width: 520px) {
  .research-stats {
    grid-template-columns: 1fr;
  }
}

.contact-hero {
  position: relative;
  padding: clamp(42px, 6vw, 78px) 0 clamp(30px, 4.5vw, 56px);
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}

.contact-watermark {
  position: absolute;
  right: -0.07em;
  bottom: -0.18em;
  z-index: 0;
  color: transparent;
  font-size: clamp(92px, 17vw, 236px);
  font-weight: 700;
  line-height: 0.82;
  letter-spacing: 0.02em;
  opacity: 0.12;
  -webkit-text-stroke: 1px rgba(17, 17, 17, 0.5);
  text-stroke: 1px rgba(17, 17, 17, 0.5);
  pointer-events: none;
}

.contact-hero > div:not(.contact-watermark) {
  position: relative;
  z-index: 1;
}

.contact-hero h1 {
  margin: 0;
  font-size: clamp(54px, 8vw, 118px);
  font-weight: 500;
  line-height: 0.92;
  letter-spacing: 0.03em;
}

.contact-lead {
  max-width: 720px;
  margin: clamp(22px, 3vw, 36px) 0 0;
  color: var(--muted);
  font-size: clamp(16px, 1.35vw, 20px);
  line-height: 1.78;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.82fr 0.82fr 0.9fr;
  border-left: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.contact-grid article {
  min-height: 250px;
  padding: clamp(24px, 3vw, 40px);
  border-right: 1px solid var(--line);
  border-top: 1px solid var(--line);
  background: rgba(246, 245, 241, 0.68);
}

.contact-grid article:nth-child(2) {
  background: rgba(17, 17, 17, 0.032);
}

.contact-grid h2 {
  margin: clamp(24px, 3vw, 42px) 0 18px;
  font-size: clamp(22px, 2.2vw, 34px);
  font-weight: 500;
  line-height: 1.25;
  overflow-wrap: anywhere;
}

.contact-primary h2 {
  font-size: clamp(24px, 3.4vw, 52px);
}

.phone-number {
  margin-top: 0;
}

.contact-grid p {
  margin: 0 0 8px;
  color: var(--muted);
  font-size: clamp(15px, 1.15vw, 18px);
  line-height: 1.65;
}

.contact-action,
.contact-downloads a {
  display: inline-grid;
  margin-top: clamp(18px, 2.4vw, 30px);
  padding: 13px 16px;
  border: 1px solid var(--ink);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.08em;
  transition: background-color 160ms ease, color 160ms ease;
}

.contact-action:hover,
.contact-action:focus-visible,
.contact-downloads a:hover,
.contact-downloads a:focus-visible {
  background: var(--ink);
  color: var(--paper);
  outline: none;
}

.contact-downloads {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.wechat-panel img {
  display: block;
  width: min(100%, 260px);
  margin-top: clamp(18px, 2.4vw, 30px);
  border: 1px solid var(--line);
  background: #ffffff;
}

.contact-shortcuts {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin-top: clamp(42px, 6vw, 82px);
  border-left: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.contact-shortcuts a {
  display: grid;
  min-height: 132px;
  align-content: space-between;
  padding: clamp(18px, 2.4vw, 30px);
  border-top: 1px solid var(--line);
  border-right: 1px solid var(--line);
  transition: background-color 160ms ease, color 160ms ease;
}

.contact-shortcuts a:nth-child(2n) {
  background: rgba(17, 17, 17, 0.026);
}

.contact-shortcuts span {
  color: transparent;
  font-size: clamp(30px, 3.8vw, 58px);
  font-weight: 700;
  line-height: 0.9;
  -webkit-text-stroke: 1px rgba(17, 17, 17, 0.62);
  text-stroke: 1px rgba(17, 17, 17, 0.62);
}

.contact-shortcuts strong {
  font-size: clamp(18px, 1.5vw, 24px);
  font-weight: 500;
}

.contact-shortcuts em {
  color: var(--muted);
  font-size: 14px;
  font-style: normal;
}

.contact-shortcuts a:hover,
.contact-shortcuts a:focus-visible {
  background: var(--ink);
  color: var(--paper);
  outline: none;
}

.contact-shortcuts a:hover span,
.contact-shortcuts a:focus-visible span {
  -webkit-text-stroke-color: rgba(246, 245, 241, 0.82);
}

.contact-shortcuts a:hover em,
.contact-shortcuts a:focus-visible em {
  color: rgba(246, 245, 241, 0.72);
}

@media (max-width: 900px) {
  .contact-hero {
    padding: 34px 0 30px;
  }

  .contact-hero h1 {
    font-size: clamp(42px, 14vw, 78px);
  }

  .contact-lead {
    font-size: 15px;
  }

  .contact-watermark {
    right: -0.14em;
    bottom: -0.06em;
    font-size: clamp(90px, 32vw, 168px);
    opacity: 0.08;
  }

  .contact-grid,
  .contact-shortcuts {
    grid-template-columns: 1fr;
  }

  .contact-grid article,
  .contact-shortcuts a {
    min-height: auto;
  }
}

.portfolio-hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: clamp(24px, 5vw, 72px);
  align-items: end;
  padding: clamp(42px, 6vw, 78px) 0 clamp(30px, 4.5vw, 56px);
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}

.portfolio-watermark {
  position: absolute;
  right: -0.05em;
  bottom: -0.18em;
  z-index: 0;
  color: transparent;
  font-size: clamp(94px, 17vw, 240px);
  font-weight: 700;
  line-height: 0.82;
  letter-spacing: 0.02em;
  opacity: 0.12;
  -webkit-text-stroke: 1px rgba(17, 17, 17, 0.5);
  text-stroke: 1px rgba(17, 17, 17, 0.5);
  pointer-events: none;
}

.portfolio-hero > div:not(.portfolio-watermark),
.portfolio-hero .download-link {
  position: relative;
  z-index: 1;
}

.portfolio-hero h1 {
  margin: 0;
  font-size: clamp(52px, 8vw, 116px);
  font-weight: 500;
  line-height: 0.9;
  letter-spacing: 0.03em;
}

.portfolio-lead {
  max-width: 780px;
  margin: clamp(20px, 2.8vw, 32px) 0 0;
  color: var(--muted);
  font-size: clamp(16px, 1.3vw, 19px);
  line-height: 1.75;
}

.portfolio-index {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  border-left: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.portfolio-index a {
  display: grid;
  min-height: 152px;
  align-content: space-between;
  gap: 12px;
  padding: clamp(18px, 2vw, 26px);
  border-right: 1px solid var(--line);
  transition: background-color 160ms ease, color 160ms ease;
}

.portfolio-index a:nth-child(2n) {
  background: rgba(17, 17, 17, 0.03);
}

.portfolio-index a:hover,
.portfolio-index a:focus-visible {
  background: var(--ink);
  color: var(--paper);
  outline: none;
}

.portfolio-index span {
  color: transparent;
  font-size: clamp(34px, 4vw, 62px);
  font-weight: 700;
  line-height: 0.9;
  -webkit-text-stroke: 1px rgba(17, 17, 17, 0.62);
  text-stroke: 1px rgba(17, 17, 17, 0.62);
}

.portfolio-index strong {
  font-size: clamp(17px, 1.4vw, 22px);
  font-weight: 500;
  line-height: 1.35;
}

.portfolio-index em {
  color: var(--muted);
  font-size: 13px;
  font-style: normal;
}

.portfolio-index a:hover em,
.portfolio-index a:focus-visible em {
  color: rgba(246, 245, 241, 0.72);
}

.portfolio-index a:hover span,
.portfolio-index a:focus-visible span {
  -webkit-text-stroke-color: rgba(246, 245, 241, 0.82);
}

.portfolio-list {
  display: grid;
  gap: clamp(42px, 6vw, 82px);
  padding: clamp(44px, 6vw, 84px) 0 0;
}

.portfolio-project {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(280px, 0.55fr);
  gap: clamp(24px, 4.5vw, 66px);
  align-items: start;
  padding-bottom: clamp(42px, 6vw, 82px);
  border-bottom: 1px solid var(--line);
}

.portfolio-project:nth-child(even) {
  grid-template-columns: minmax(280px, 0.55fr) minmax(0, 1.2fr);
}

.portfolio-project:nth-child(even) figure {
  order: 2;
}

.portfolio-project figure {
  margin: 0;
  border: 1px solid var(--line);
  background: rgba(17, 17, 17, 0.04);
  overflow: hidden;
}

.portfolio-project img {
  display: block;
  width: 100%;
  height: auto;
}

.project-mosaic figure {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--line);
}

.project-copy {
  position: sticky;
  top: 26px;
  padding-left: clamp(16px, 2vw, 26px);
  border-left: 1px solid var(--fine-line);
}

.project-no {
  color: transparent;
  font-size: clamp(44px, 6vw, 86px);
  font-weight: 700;
  line-height: 0.9;
  -webkit-text-stroke: 1px rgba(17, 17, 17, 0.58);
  text-stroke: 1px rgba(17, 17, 17, 0.58);
}

.project-copy h2 {
  margin: clamp(18px, 2.8vw, 34px) 0 12px;
  font-size: clamp(28px, 3.6vw, 56px);
  font-weight: 500;
  line-height: 1.08;
}

.project-subtitle {
  color: var(--ink);
  font-size: clamp(16px, 1.45vw, 21px);
}

.project-copy p {
  margin: 0 0 18px;
  color: var(--muted);
  font-size: clamp(15px, 1.18vw, 18px);
  line-height: 1.75;
}

.project-copy dl {
  display: grid;
  gap: 10px;
  margin: clamp(24px, 3vw, 36px) 0 0;
}

.project-copy dl div {
  display: grid;
  grid-template-columns: 64px minmax(0, 1fr);
  gap: 16px;
  padding-top: 10px;
  border-top: 1px solid var(--line);
}

.project-copy dt,
.project-copy dd {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.55;
}

.project-copy dt {
  color: var(--ink);
  font-weight: 500;
}

.project-link {
  display: inline-grid;
  margin-top: clamp(20px, 2.6vw, 32px);
  padding: 13px 16px;
  border: 1px solid var(--ink);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.08em;
  transition: background-color 160ms ease, color 160ms ease;
}

.project-link:hover,
.project-link:focus-visible {
  background: var(--ink);
  color: var(--paper);
  outline: none;
}

.project-detail-hero {
  padding: clamp(36px, 6vw, 74px) 0 clamp(28px, 4vw, 48px);
  border-bottom: 1px solid var(--line);
}

.back-link {
  display: inline-block;
  margin-bottom: clamp(24px, 4vw, 46px);
  color: var(--muted);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.08em;
}

.back-link:hover,
.back-link:focus-visible {
  color: var(--ink);
  text-decoration: underline;
  text-underline-offset: 5px;
  outline: none;
}

.project-detail-hero h1 {
  max-width: 980px;
  margin: 0;
  font-size: clamp(42px, 7vw, 104px);
  font-weight: 500;
  line-height: 1.02;
}

.project-detail-hero > p:last-child {
  max-width: 760px;
  margin: clamp(16px, 2.4vw, 28px) 0 0;
  color: var(--muted);
  font-size: clamp(16px, 1.4vw, 21px);
  line-height: 1.65;
}

.project-sheets {
  display: grid;
  gap: clamp(18px, 3vw, 36px);
  padding: clamp(28px, 5vw, 64px) 0;
}

.project-sheets img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--line);
  background: rgba(17, 17, 17, 0.04);
  cursor: zoom-in;
}

.project-detail-nav {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.project-detail-nav a {
  min-height: 70px;
  display: grid;
  place-items: center;
  padding: 18px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.08em;
  transition: background-color 160ms ease, color 160ms ease;
}

.project-detail-nav a:hover,
.project-detail-nav a:focus-visible {
  background: var(--ink);
  color: var(--paper);
  outline: none;
}

@media (max-width: 900px) {
  .portfolio-hero,
  .portfolio-project,
  .portfolio-project:nth-child(even) {
    grid-template-columns: 1fr;
  }

  .portfolio-hero {
    padding: 34px 0 30px;
  }

  .portfolio-hero h1 {
    font-size: clamp(46px, 15vw, 82px);
  }

  .portfolio-lead {
    font-size: 15px;
  }

  .portfolio-watermark {
    right: -0.12em;
    bottom: -0.06em;
    font-size: clamp(86px, 28vw, 160px);
    opacity: 0.08;
  }

  .portfolio-index {
    grid-template-columns: 1fr;
  }

  .portfolio-index a {
    min-height: 86px;
    grid-template-columns: 52px minmax(0, 1fr);
    align-content: center;
  }

  .portfolio-index em {
    grid-column: 2;
  }

  .portfolio-project:nth-child(even) figure {
    order: 0;
  }

  .project-copy {
    position: static;
  }

  .project-detail-hero h1 {
    font-size: clamp(34px, 11vw, 58px);
  }

  .project-detail-nav {
    grid-template-columns: 1fr;
  }
}

.page {
  position: relative;
  min-height: 100vh;
  padding: clamp(22px, 4vw, 46px);
  background:
    linear-gradient(90deg, rgba(17, 17, 17, 0.03) 1px, transparent 1px),
    linear-gradient(180deg, rgba(17, 17, 17, 0.022) 1px, transparent 1px),
    var(--paper);
  background-size: 80px 80px, 80px 80px, auto;
}

@media (max-width: 760px) {
  .page {
    padding: 18px;
  }

  .page-header {
    gap: 18px;
    padding-bottom: 18px;
  }

  .top-nav {
    width: calc(100vw - 36px);
    flex-wrap: nowrap;
    justify-content: flex-start;
    gap: 18px;
    overflow-x: auto;
    padding-bottom: 6px;
    scrollbar-width: thin;
  }

  .top-nav a {
    min-width: max-content;
  }
}

.page-header {
  align-items: flex-start;
  border-bottom: 1px solid var(--line);
  padding-bottom: clamp(18px, 2vw, 28px);
}

.top-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: clamp(14px, 2.2vw, 34px);
  max-width: 840px;
}

.top-nav a {
  display: grid;
  gap: 5px;
  text-align: right;
}

.top-nav a span:first-child {
  font-size: clamp(11px, 0.9vw, 13px);
  font-weight: 500;
  letter-spacing: 0.1em;
}

.top-nav a span:last-child {
  color: var(--muted);
  font-size: 13px;
}

.top-nav a:hover,
.top-nav a:focus-visible,
.top-nav a.is-active {
  color: var(--ink);
  text-decoration: underline;
  text-underline-offset: 6px;
}

.section-index {
  margin: 0 0 clamp(18px, 2.4vw, 32px);
  color: var(--muted);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.16em;
}

.about-overview {
  position: relative;
  display: grid;
  grid-template-columns: minmax(280px, 0.95fr) minmax(360px, 1.05fr);
  gap: clamp(34px, 6vw, 90px);
  padding: clamp(44px, 6vw, 78px) 0 clamp(34px, 5vw, 62px);
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}

.profile-watermark {
  position: absolute;
  right: -0.08em;
  bottom: -0.18em;
  z-index: 0;
  color: transparent;
  font-size: clamp(84px, 16vw, 220px);
  font-weight: 700;
  line-height: 0.8;
  letter-spacing: 0.04em;
  opacity: 0.16;
  -webkit-text-stroke: 1px rgba(17, 17, 17, 0.45);
  text-stroke: 1px rgba(17, 17, 17, 0.45);
  pointer-events: none;
}

.about-heading,
.metric-grid {
  position: relative;
  z-index: 1;
}

.about-heading {
  padding-left: clamp(16px, 2vw, 26px);
  border-left: 1px solid var(--fine-line);
}

.about-heading h1 {
  margin: 0;
  font-size: clamp(54px, 6.8vw, 104px);
  font-weight: 500;
  line-height: 0.95;
  letter-spacing: 0.08em;
}

.about-name {
  margin: clamp(12px, 1.4vw, 18px) 0 clamp(22px, 3vw, 34px);
  color: var(--ink);
  font-size: clamp(22px, 2vw, 30px);
  font-weight: 500;
  letter-spacing: 0.06em;
}

.about-heading p:not(.section-index):not(.about-name) {
  margin: 0 0 18px;
  color: var(--muted);
  font-size: clamp(16px, 1.35vw, 20px);
  line-height: 1.85;
}

.metric-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
  background: rgba(246, 245, 241, 0.76);
  backdrop-filter: blur(6px);
}

.metric-grid article {
  display: grid;
  min-height: 168px;
  align-content: space-between;
  padding: clamp(18px, 2.4vw, 30px);
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.metric-grid strong {
  font-size: clamp(38px, 5vw, 74px);
  font-weight: 500;
  line-height: 0.9;
}

.metric-grid article:nth-child(1) {
  background: rgba(17, 17, 17, 0.04);
}

.metric-grid article:nth-child(4) {
  background: rgba(17, 17, 17, 0.035);
}

.metric-grid span {
  color: var(--muted);
  font-size: clamp(14px, 1.2vw, 17px);
}

.about-route {
  display: grid;
  grid-template-columns: minmax(220px, 0.38fr) minmax(0, 1fr);
  gap: clamp(26px, 5vw, 72px);
  padding: clamp(34px, 5vw, 64px) 0;
  border-bottom: 1px solid var(--line);
}

.route-title {
  position: sticky;
  top: 24px;
  align-self: start;
  padding-left: clamp(16px, 2vw, 26px);
  border-left: 1px solid var(--fine-line);
}

.route-title span {
  color: var(--muted);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.16em;
}

.route-title h2 {
  margin: 20px 0 0;
  font-size: clamp(26px, 3.1vw, 48px);
  font-weight: 500;
  line-height: 1.15;
}

.route-list {
  display: grid;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: route;
  border-top: 1px solid var(--line);
}

.route-list li {
  position: relative;
  display: grid;
  grid-template-columns: 86px minmax(140px, 0.28fr) minmax(0, 1fr);
  gap: clamp(14px, 2vw, 28px);
  align-items: baseline;
  padding: clamp(22px, 3vw, 36px) 0;
  border-bottom: 1px solid var(--line);
}

.route-list li::before {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 86px;
  width: 1px;
  background: rgba(17, 17, 17, 0.12);
  content: "";
}

.route-number {
  color: transparent;
  font-size: clamp(34px, 4.2vw, 62px);
  font-weight: 700;
  line-height: 0.9;
  -webkit-text-stroke: 1px rgba(17, 17, 17, 0.6);
  text-stroke: 1px rgba(17, 17, 17, 0.6);
}

.route-list h3 {
  margin: 0;
  font-size: clamp(20px, 2vw, 30px);
  font-weight: 500;
}

.route-list p {
  margin: 0;
  color: var(--muted);
  font-size: clamp(15px, 1.22vw, 18px);
  line-height: 1.75;
}

.about-details {
  display: grid;
  grid-template-columns: 1.2fr 0.9fr 0.9fr;
  border-left: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.detail-panel {
  min-height: 184px;
  padding: clamp(22px, 3vw, 36px);
  border-top: 1px solid var(--line);
  border-right: 1px solid var(--line);
}

.detail-panel h2 {
  margin: clamp(18px, 2.4vw, 30px) 0 14px;
  font-size: clamp(21px, 2vw, 30px);
  font-weight: 500;
}

.detail-panel p {
  margin: 0;
  color: var(--muted);
  font-size: clamp(15px, 1.18vw, 17px);
  line-height: 1.7;
}

.education-panel {
  background: rgba(17, 17, 17, 0.035);
}

.mini-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 26px;
}

.mini-facts span {
  padding: 7px 10px;
  border: 1px solid rgba(17, 17, 17, 0.16);
  color: var(--ink);
  font-size: 12px;
  letter-spacing: 0.06em;
}

.item-label {
  color: var(--muted);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.16em;
}

.content-led {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: 0;
  padding-top: clamp(34px, 5vw, 62px);
}

.compact-profile {
  padding-top: 0;
}

.profile-block {
  grid-column: span 6;
  min-height: 214px;
  padding: clamp(24px, 3vw, 38px);
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.profile-block:nth-child(2n),
.profile-block:last-child {
  border-right: 1px solid var(--line);
}

.profile-block:nth-last-child(-n + 2) {
  border-bottom: 1px solid var(--line);
}

.education-block {
  grid-column: span 5;
}

.research-block {
  grid-column: span 7;
}

.profile-block h2 {
  margin: clamp(20px, 2.4vw, 34px) 0 18px;
  font-size: clamp(22px, 2.1vw, 31px);
  font-weight: 500;
}

.profile-block p,
.profile-block li,
.profile-block dd,
.profile-block dt {
  margin: 0 0 8px;
  color: var(--muted);
  font-size: clamp(15px, 1.2vw, 18px);
  line-height: 1.7;
}

.profile-block ul {
  margin: 0;
  padding-left: 1.1em;
}

.profile-block dl {
  display: grid;
  gap: 12px;
  margin: 0;
}

.profile-block dl div {
  display: grid;
  grid-template-columns: 82px minmax(0, 1fr);
  gap: 18px;
}

.profile-block dt {
  color: var(--ink);
  font-weight: 500;
}

@media (max-width: 900px) {
  .page-header {
    display: grid;
    gap: 24px;
  }

  .top-nav {
    justify-content: flex-start;
  }

  .top-nav a {
    text-align: left;
  }

  .about-overview {
    grid-template-columns: 1fr;
  }

  .about-overview {
    padding: 34px 0 32px;
  }

  .about-heading h1 {
    font-size: clamp(46px, 13vw, 76px);
  }

  .profile-watermark {
    right: -0.18em;
    bottom: -0.08em;
    font-size: clamp(92px, 30vw, 168px);
    opacity: 0.09;
  }

  .metric-grid,
  .content-led,
  .about-route,
  .about-details {
    grid-template-columns: 1fr;
  }

  .route-title {
    position: static;
  }

  .route-list li {
    grid-template-columns: 68px 1fr;
  }

  .route-list li::before {
    left: 68px;
  }

  .route-list p {
    grid-column: 2;
  }

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

  .metric-grid article {
    min-height: 112px;
  }

  .metric-grid strong {
    font-size: clamp(30px, 10vw, 48px);
  }

  .about-route {
    gap: 24px;
    padding: 32px 0;
  }

  .route-list li {
    padding: 20px 0;
  }

  .about-details {
    border-left: 0;
  }

  .detail-panel {
    min-height: auto;
    border-left: 1px solid var(--line);
  }

  .profile-block,
  .education-block,
  .research-block {
    grid-column: auto;
    border-right: 1px solid var(--line);
  }
}

.resume-hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: clamp(24px, 5vw, 72px);
  align-items: end;
  padding: clamp(42px, 6vw, 78px) 0 clamp(30px, 4.5vw, 56px);
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}

.resume-watermark {
  position: absolute;
  right: 0;
  bottom: -0.22em;
  z-index: 0;
  color: transparent;
  font-size: clamp(120px, 20vw, 280px);
  font-weight: 700;
  line-height: 0.82;
  letter-spacing: 0.02em;
  opacity: 0.13;
  -webkit-text-stroke: 1px rgba(17, 17, 17, 0.5);
  text-stroke: 1px rgba(17, 17, 17, 0.5);
  pointer-events: none;
}

.resume-hero > div:not(.resume-watermark),
.download-link {
  position: relative;
  z-index: 1;
}

.resume-hero h1 {
  margin: 0;
  font-size: clamp(52px, 8vw, 116px);
  font-weight: 500;
  line-height: 0.9;
  letter-spacing: 0.03em;
}

.resume-lead {
  max-width: 780px;
  margin: clamp(20px, 2.8vw, 32px) 0 0;
  color: var(--muted);
  font-size: clamp(16px, 1.3vw, 19px);
  line-height: 1.75;
}

.download-link {
  display: grid;
  min-width: 168px;
  gap: 8px;
  padding: 18px 20px;
  border: 1px solid var(--ink);
  text-align: center;
  transition: background-color 160ms ease, color 160ms ease;
}

.download-link span:first-child {
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.12em;
}

.download-link span:last-child {
  color: var(--muted);
  font-size: 14px;
}

.download-link:hover,
.download-link:focus-visible {
  background: var(--ink);
  color: var(--paper);
  outline: none;
}

.download-link:hover span:last-child,
.download-link:focus-visible span:last-child {
  color: rgba(246, 245, 241, 0.72);
}

.resume-stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border-left: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.resume-stats article {
  display: grid;
  min-height: 142px;
  align-content: space-between;
  padding: clamp(20px, 2.4vw, 30px);
  border-right: 1px solid var(--line);
  background: rgba(246, 245, 241, 0.65);
}

.resume-stats article:nth-child(2n) {
  background: rgba(17, 17, 17, 0.035);
}

.resume-stats strong {
  font-size: clamp(34px, 4.2vw, 64px);
  font-weight: 500;
  line-height: 0.92;
}

.resume-stats span {
  color: var(--muted);
  font-size: clamp(14px, 1.1vw, 17px);
}

.resume-path {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-left: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.resume-path article {
  min-height: 188px;
  padding: clamp(22px, 2.8vw, 36px);
  border-right: 1px solid var(--line);
  background:
    linear-gradient(135deg, transparent 0 49.7%, rgba(17, 17, 17, 0.05) 50%, transparent 50.3%),
    rgba(246, 245, 241, 0.7);
}

.resume-path article:nth-child(2) {
  background: rgba(17, 17, 17, 0.035);
}

.resume-path span {
  color: transparent;
  font-size: clamp(32px, 4vw, 58px);
  font-weight: 700;
  line-height: 0.9;
  -webkit-text-stroke: 1px rgba(17, 17, 17, 0.58);
  text-stroke: 1px rgba(17, 17, 17, 0.58);
}

.resume-path h2 {
  margin: clamp(20px, 2.8vw, 34px) 0 12px;
  font-size: clamp(20px, 1.8vw, 28px);
  font-weight: 500;
}

.resume-path p {
  margin: 0;
  color: var(--muted);
  font-size: clamp(14px, 1.1vw, 17px);
  line-height: 1.7;
}

.resume-section {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(22px, 3.2vw, 46px);
  padding: clamp(42px, 5.2vw, 72px) 0;
  border-bottom: 1px solid var(--line);
}

.resume-section-title {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 18px;
  padding-left: clamp(16px, 2vw, 26px);
  border-left: 1px solid var(--fine-line);
}

.resume-section-title span {
  color: var(--muted);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.16em;
}

.resume-section-title h2 {
  margin: 0;
  font-size: clamp(30px, 4vw, 62px);
  font-weight: 500;
  line-height: 0.95;
}

.resume-section-body {
  display: grid;
  gap: 0;
}

.resume-entry {
  display: grid;
  grid-template-columns: minmax(130px, 0.22fr) minmax(0, 1fr);
  gap: clamp(16px, 2.5vw, 36px);
  padding: clamp(20px, 2.6vw, 32px) clamp(18px, 2.5vw, 32px);
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
  border-right: 1px solid var(--line);
}

.resume-entry:last-child {
  border-bottom: 1px solid var(--line);
}

.entry-time {
  width: fit-content;
  align-self: start;
  padding: 6px 8px;
  border: 1px solid rgba(17, 17, 17, 0.16);
  color: var(--muted);
  font-size: clamp(13px, 1.1vw, 16px);
  line-height: 1.45;
}

.resume-entry h3,
.award-groups h3 {
  margin: 0 0 12px;
  font-size: clamp(18px, 1.55vw, 24px);
  font-weight: 500;
  line-height: 1.35;
}

.resume-entry p,
.award-groups li {
  margin: 0 0 8px;
  color: var(--muted);
  font-size: clamp(15px, 1.17vw, 17px);
  line-height: 1.7;
}

.entry-note {
  margin-top: 12px;
}

.research-list .resume-entry:first-child {
  padding-top: clamp(20px, 2.6vw, 32px);
}

.research-list .resume-entry:nth-child(2n) {
  background: rgba(17, 17, 17, 0.026);
}

.award-groups {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.award-groups article {
  padding: clamp(22px, 2.6vw, 34px);
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.award-groups ul {
  margin: 0;
  padding-left: 1.1em;
}

.language-grid {
  grid-template-columns: repeat(2, minmax(0, 240px));
  gap: 0;
  align-items: start;
}

.language-grid article {
  display: grid;
  gap: 12px;
  padding: clamp(24px, 3vw, 38px);
  border: 1px solid var(--line);
  border-right: 0;
}

.language-grid article:last-child {
  border-right: 1px solid var(--line);
}

.language-grid strong {
  color: var(--muted);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.14em;
}

.language-grid span {
  font-size: clamp(44px, 5vw, 72px);
  line-height: 0.9;
}

@media (max-width: 900px) {
  .resume-hero,
  .resume-section,
  .resume-entry,
  .resume-path {
    grid-template-columns: 1fr;
  }

  .resume-stats,
  .language-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .award-groups {
    grid-template-columns: 1fr;
  }

  .resume-hero {
    padding: 34px 0 30px;
  }

  .resume-hero h1 {
    font-size: clamp(46px, 15vw, 82px);
  }

  .resume-lead {
    font-size: 15px;
  }

  .resume-watermark {
    right: -0.16em;
    bottom: -0.08em;
    font-size: clamp(100px, 36vw, 190px);
    opacity: 0.09;
  }

  .download-link {
    width: 100%;
    min-width: 0;
  }

  .resume-stats article {
    min-height: 112px;
  }

  .resume-stats strong {
    font-size: clamp(30px, 10vw, 48px);
  }

  .resume-path {
    grid-template-columns: 1fr;
  }

  .resume-path article {
    min-height: auto;
  }

  .resume-section {
    padding: 34px 0;
  }

  .resume-section-title {
    display: grid;
    gap: 12px;
  }

  .resume-section-title h2 {
    font-size: clamp(30px, 10vw, 48px);
  }

  .resume-entry {
    gap: 14px;
    padding: 20px 16px;
  }

  .entry-time {
    width: auto;
  }

  .language-grid article {
    border-right: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
  }

  .language-grid article:last-child {
    border-bottom: 1px solid var(--line);
  }
}

@media (max-width: 760px) {
  .page {
    padding: 18px;
  }

  .page-header {
    display: grid;
    gap: 18px;
    padding-bottom: 18px;
  }

  .top-nav {
    width: calc(100vw - 36px);
    display: flex;
    flex-wrap: nowrap;
    justify-content: flex-start;
    gap: 18px;
    max-width: none;
    overflow-x: auto;
    padding-bottom: 6px;
    scrollbar-width: thin;
  }

  .top-nav a {
    min-width: max-content;
    text-align: left;
  }

  .brand-cn {
    font-size: clamp(26px, 9vw, 38px);
  }

  .about-heading p:not(.section-index):not(.about-name),
  .resume-lead,
  .route-list p,
  .detail-panel p,
  .resume-entry p,
  .award-groups li {
    font-size: 15px;
    line-height: 1.72;
  }
}