/* d03: the workshop's seal green, white type and the plates of 天工开物 (1637) cut white into it. */
@font-face { font-family: "Epilogue"; src: url("fonts/epilogue-latin-var.woff2") format("woff2"); font-weight: 100 900; font-display: swap; }
/* Chinese pages take only Latin letters and figures from Epilogue, so CJK punctuation and quotes stay full width. */
@font-face { font-family: "Epilogue Latin"; src: url("fonts/epilogue-latin-var.woff2") format("woff2"); font-weight: 100 900; font-display: swap; unicode-range: U+0020-0021, U+0023-0026, U+0028-007E, U+00A0-00FF; }

:root {
  --ground: #1f5a12;
  --deep: #174a0d;
  --lift: #286b1a;
  --seal: #46a629;
  --ink: #ffffff;
  --muted: #d4e7cb;
  --paper: #f6f8f2;
  --paper-ink: #1a4d0f;
  --seal-ink: #0d2a07;
  --cjk: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", "Source Han Sans SC", "Noto Sans SC", sans-serif;
  --font: "Epilogue", var(--cjk);
  --m: clamp(18px, 2.4vw, 32px);
  --gap: clamp(12px, 1.6vw, 24px);
  --section: clamp(96px, 11vw, 176px);
  --step-small: 0.875rem;
  --step-body: clamp(1.0625rem, 1rem + 0.2vw, 1.1875rem);
  --step-lead: clamp(1.25rem, 1.05rem + 0.6vw, 1.625rem);
  --step-head: clamp(2rem, 1.1rem + 2.8vw, 3.5rem);
  --step-display: clamp(2.75rem, 1.2rem + 4.8vw, 5.5rem);
  --ease: cubic-bezier(.2, .7, .2, 1);
}
html:lang(zh-CN) { --font: "Epilogue Latin", var(--cjk); }

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; background: var(--paper); }
body { margin: 0; font-family: var(--font); font-size: var(--step-body); line-height: 1.55; color: var(--ink); background: var(--ground); font-kerning: normal; }
html:lang(zh-CN) body { line-height: 1.8; }
h1, h2, h3, p, ul, figure, blockquote { margin: 0; }
ul { padding: 0; list-style: none; }
img, video, svg { display: block; max-width: 100%; }
img { height: auto; }
a { color: inherit; text-decoration-thickness: 2px; text-underline-offset: .22em; }
p, li { text-wrap: pretty; }
:focus-visible { outline: 3px solid var(--paper); outline-offset: 3px; }
::selection { background: var(--paper); color: var(--paper-ink); }

.skip { position: absolute; left: var(--m); top: -80px; z-index: 20; background: var(--paper); color: var(--paper-ink); padding: 10px 16px; font-weight: 700; }
.skip:focus { top: 8px; }

/* type roles */
.section-title, .head__title, .hero__title, .member__name { font-weight: 900; text-wrap: balance; }
.section-title { font-size: var(--step-head); line-height: 1.02; letter-spacing: -.03em; }
.head__title, .hero__title { font-size: var(--step-display); line-height: .98; letter-spacing: -.045em; }
html:lang(zh-CN) .section-title, html:lang(zh-CN) .head__title, html:lang(zh-CN) .hero__title { letter-spacing: .04em; line-height: 1.12; }

.button { display: inline-flex; align-items: center; justify-content: center; min-height: 52px; padding: 0 32px; background: var(--paper); color: var(--paper-ink); font-weight: 700; font-size: var(--step-body); text-decoration: none; transition: background-color .2s, color .2s, transform .2s var(--ease); }
.button:hover { background: var(--seal); color: var(--seal-ink); }
.button:active { transform: translateY(2px); }
.button--bar { min-height: 44px; padding: 0 20px; }

/* the bar */
.bar { position: relative; z-index: 3; display: flex; align-items: center; gap: clamp(16px, 2.4vw, 40px); padding: 14px var(--m); background: var(--ground); }
.bar__brand { position: relative; flex: none; display: block; width: clamp(128px, 11vw, 172px); aspect-ratio: 684 / 220; overflow: hidden; background: #fff; transition: transform .2s var(--ease); }
.bar__brand img { position: absolute; max-width: none; width: 116.96%; left: -12.28%; top: -74.5%; }
.bar__brand:hover { transform: translateY(-2px); }
.bar__nav { margin-left: auto; }
.bar__nav ul { display: flex; gap: clamp(18px, 2.2vw, 36px); }
.bar__nav a, .bar__lang { display: inline-block; padding: 10px 0; font-weight: 500; text-decoration: none; }
.bar__nav a:hover, .bar__lang:hover { text-decoration: underline; }
.bar__nav a[aria-current] { text-decoration: underline; text-decoration-thickness: 3px; text-underline-offset: .5em; }

/* home: the counter object */
.hero { display: flex; flex-direction: column; align-items: center; text-align: center; padding: clamp(12px, 1.6vw, 24px) var(--m) 0; }
.hero__object { position: relative; width: clamp(196px, 23vw, 380px); aspect-ratio: 4 / 5; }
.plate { position: absolute; inset: 0; }
.plate img { width: 100%; height: 100%; object-fit: cover; }
.plate figcaption { position: absolute; left: calc(100% + 32px); top: 0; width: clamp(180px, 16vw, 260px); text-align: left; font-size: var(--step-small); line-height: 1.55; color: var(--muted); }
.plate figcaption span, .head__plate figcaption span, .diptych figcaption span { display: block; margin-top: 6px; color: var(--ink); }
.plate + .plate { display: none; }
@media (prefers-reduced-motion: no-preference) {
  .js .plate + .plate { display: block; }
  .js .plate { opacity: 0; transition: opacity 1.6s ease; }
  .js .plate.is-on { opacity: 1; }
}
.hero__mark { margin-top: clamp(18px, 2vw, 30px); padding-left: .9em; font-size: clamp(15px, 2.2vw, 34px); font-weight: 900; line-height: 1; letter-spacing: .9em; text-transform: uppercase; white-space: nowrap; }
.hero__title { margin-top: clamp(20px, 2.2vw, 34px); }
.hero__facts { font-size: max(18px, var(--step-body)); width: 100%; max-width: 1180px; margin-top: clamp(16px, 1.8vw, 26px); display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: var(--gap); line-height: 1.5; }
.hero .button { margin-top: clamp(20px, 2vw, 30px); }

/* home: the founder's letter */
.letter { padding: var(--section) var(--m) 0; display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); column-gap: var(--gap); }
.letter .section-title { grid-column: 1 / -1; margin-bottom: clamp(32px, 4vw, 56px); }
.letter__body { grid-column: 1 / -1; columns: 2; column-gap: clamp(32px, 5vw, 80px); font-size: var(--step-lead); line-height: 1.5; }
html:lang(zh-CN) .letter__body { line-height: 1.85; text-align: justify; }
.letter__body > * { margin-bottom: .9em; }
.letter__body li { margin-bottom: .55em; }
.letter__body > .letter__q { margin-bottom: .55em; }
.letter__q, .letter__close a { background: var(--seal); color: var(--seal-ink); padding: .06em .22em; -webkit-box-decoration-break: clone; box-decoration-break: clone; }
.letter__close a { background: var(--paper); color: var(--paper-ink); text-decoration: none; transition: background-color .2s, color .2s; }
.letter__close a:hover { background: var(--seal); color: var(--seal-ink); }
.letter__sign { grid-column: 7 / -1; display: flex; align-items: center; justify-content: flex-end; gap: clamp(18px, 2vw, 28px); margin-top: clamp(16px, 2vw, 28px); }
.letter__sign p { font-size: var(--step-lead); line-height: 1.45; }
.seal-crop { position: relative; flex: none; width: clamp(72px, 6.4vw, 96px); aspect-ratio: 1; overflow: hidden; }
.seal-crop img { position: absolute; max-width: none; width: 442%; left: -57.5%; top: -101.7%; }

/* home: the sayings, on paper slips */
.sayings { margin-top: var(--section); padding: clamp(72px, 8vw, 128px) var(--m) clamp(88px, 9vw, 144px); background: var(--deep); overflow: hidden; }
.slips { margin-top: clamp(36px, 4vw, 64px); display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); gap: clamp(28px, 3.2vw, 52px) clamp(18px, 2.4vw, 40px); align-items: start; }
.slip { padding: clamp(30px, 2.8vw, 42px) clamp(22px, 2.2vw, 34px); background: var(--paper); color: var(--paper-ink); transform: rotate(var(--r, 0deg)); transition: transform .4s var(--ease);
  clip-path: polygon(0.00% 7px,4.17% 0px,8.33% 7px,12.50% 0px,16.67% 7px,20.83% 0px,25.00% 7px,29.17% 0px,33.33% 7px,37.50% 0px,41.67% 7px,45.83% 0px,50.00% 7px,54.17% 0px,58.33% 7px,62.50% 0px,66.67% 7px,70.83% 0px,75.00% 7px,79.17% 0px,83.33% 7px,87.50% 0px,91.67% 7px,95.83% 0px,100.00% 7px,100.00% calc(100% - 7px),95.83% calc(100% - 0px),91.67% calc(100% - 7px),87.50% calc(100% - 0px),83.33% calc(100% - 7px),79.17% calc(100% - 0px),75.00% calc(100% - 7px),70.83% calc(100% - 0px),66.67% calc(100% - 7px),62.50% calc(100% - 0px),58.33% calc(100% - 7px),54.17% calc(100% - 0px),50.00% calc(100% - 7px),45.83% calc(100% - 0px),41.67% calc(100% - 7px),37.50% calc(100% - 0px),33.33% calc(100% - 7px),29.17% calc(100% - 0px),25.00% calc(100% - 7px),20.83% calc(100% - 0px),16.67% calc(100% - 7px),12.50% calc(100% - 0px),8.33% calc(100% - 7px),4.17% calc(100% - 0px),0.00% calc(100% - 7px)); }
.slip:nth-child(1) { --r: -3deg; grid-column: 1 / 5; }
.slip:nth-child(2) { --r: 2deg; grid-column: 5 / 8; margin-top: 56px; }
.slip:nth-child(3) { --r: 3deg; grid-column: 8 / 12; margin-top: 16px; }
.slip:nth-child(4) { --r: 2.5deg; grid-column: 1 / 4; }
.slip:nth-child(5) { --r: -2deg; grid-column: 4 / 9; margin-top: 40px; }
.slip:nth-child(6) { --r: -3deg; grid-column: 9 / 13; margin-top: -24px; }
.slip:hover { transform: rotate(0deg) translateY(-6px); }

/* home: the strategy board */
.strategy { padding: var(--section) var(--m) 0; }
.board { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); grid-auto-rows: clamp(100px, 8.6vw, 132px); gap: 8px; }
.tile { position: relative; overflow: hidden; background: var(--lift); }
.tile--head { grid-column: 1 / 7; grid-row: 1 / 3; display: flex; flex-direction: column; justify-content: space-between; gap: 16px; padding: clamp(20px, 2.2vw, 32px); background: var(--paper); color: var(--paper-ink); }
.tile--head p { font-size: var(--step-lead); line-height: 1.4; max-width: 32ch; }
.b1 { grid-column: 7 / 10; grid-row: 1 / 5; background: var(--deep); }
.b2 { grid-column: 10 / 13; grid-row: 1 / 3; }
.b3 { grid-column: 1 / 7; grid-row: 3 / 7; background: var(--deep); }
.b4 { grid-column: 10 / 13; grid-row: 3 / 7; background: var(--deep); }
.b5 { grid-column: 7 / 10; grid-row: 5 / 7; }
.b6 { grid-column: 1 / 7; grid-row: 7 / 9; }
.b7 { grid-column: 7 / 13; grid-row: 7 / 9; background: var(--deep); }
.tile__pic { position: absolute; max-width: none; width: 135%; top: -12%; right: -22%; transition: transform 1.2s var(--ease); }
.b2 .tile__pic { width: 120%; top: -30%; right: -12%; }
.b6 .tile__pic { width: 70%; top: -40%; right: -8%; }
.b7 .tile__pic { width: 108%; top: -24%; right: -4%; }
.tile:hover .tile__pic { transform: scale(1.04); }
.tile__cap, .tile figcaption { position: absolute; left: 0; bottom: 0; max-width: 100%; padding: 16px 20px 20px; background: inherit; }
.tile__cap h3 { font-size: var(--step-body); font-weight: 700; line-height: 1.3; }
.tile__cap p { margin-top: 8px; line-height: 1.5; }
.b6 .tile__cap { max-width: 64%; }
.tile figcaption { font-size: var(--step-small); color: var(--muted); padding: 12px 16px 14px; }
.tile--video video { width: 100%; height: 100%; object-fit: cover; filter: grayscale(1) contrast(1.15) brightness(1.05); }
.tile--video::before, .tile--video::after { content: ""; position: absolute; inset: 0; pointer-events: none; }
.tile--video::before { background: #0f2f0a; mix-blend-mode: lighten; }
.tile--video::after { background: #9fd18a; mix-blend-mode: multiply; }
.tile--video figcaption { z-index: 1; }
.tile__toggle { position: absolute; z-index: 1; top: 12px; right: 12px; min-height: 44px; padding: 0 18px; border: 0; border-radius: 0; background: var(--paper); color: var(--paper-ink); font: inherit; font-weight: 700; cursor: pointer; transition: background-color .2s, color .2s; }
.tile__toggle:hover { background: var(--seal); color: var(--seal-ink); }
.no-js .tile__toggle { display: none; }

/* inner pages: the head */
.head { padding: clamp(36px, 5vw, 80px) var(--m) 0; display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); grid-template-rows: auto 1fr; column-gap: var(--gap); align-items: start; }
.head__title { grid-column: 1 / 9; }
.head__statement { grid-column: 1 / 9; margin-top: clamp(24px, 3vw, 40px); font-size: var(--step-lead); line-height: 1.6; max-width: 34em; }
.head__plate { grid-column: 10 / 13; grid-row: 1 / 3; }
.head__plate img { width: 100%; aspect-ratio: 4 / 5; object-fit: cover; }
.head__plate figcaption, .diptych figcaption { margin-top: 12px; font-size: var(--step-small); color: var(--muted); line-height: 1.55; }

/* portfolio: big names, each company's logo held beside its description while it is read */
.works { padding: var(--section) var(--m) 0; }
.head + .works { padding-top: clamp(104px, 8vw, 128px); }
.works__count { color: var(--muted); }
.works__list { margin-top: clamp(32px, 4vw, 56px); }
.work { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); column-gap: var(--gap); align-items: start; padding-bottom: clamp(48px, 5vw, 80px); }
.work__text { grid-column: 1 / 9; grid-row: 1; }
.work__logo { grid-column: 10 / 13; grid-row: 1; position: sticky; top: 12vh; display: grid; place-items: center; aspect-ratio: 16 / 10; background: var(--paper); transition: transform .35s var(--ease); }
.work__logo img { width: 100%; height: 100%; padding: 9% 13%; object-fit: contain; mix-blend-mode: multiply; }
.work__logo.on-green img { mix-blend-mode: normal; }
.work__logo .no-logo { padding: 0 10%; }
.work:hover .work__logo { transform: translateY(-4px); }
.on-green { background: var(--deep); }
.work__name { font-size: var(--step-head); line-height: 1.05; letter-spacing: -.03em; }
html:lang(zh-CN) .work__name { letter-spacing: .02em; }
.work__alt { margin-top: 6px; font-weight: 500; color: var(--muted); }
.work__body { margin-top: 14px; max-width: 36em; }
.work__body p + p { margin-top: .7em; }
.no-logo { color: var(--paper-ink); font-weight: 900; font-size: var(--step-lead); line-height: 1.2; text-align: center; overflow-wrap: anywhere; }

/* team */
.diptych { grid-column: 7 / 13; grid-row: 1 / 3; display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.diptych img { width: 100%; aspect-ratio: 1; object-fit: cover; background: var(--lift); }
.diptych figcaption { grid-column: 1 / -1; }
.head--team .head__title, .head--team .head__statement { grid-column: 1 / 7; }
.member { margin-top: var(--section); padding: 0 var(--m); display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); column-gap: var(--gap); align-items: start; }
.member__photo { grid-column: 1 / 6; }
.member__photo img { width: 100%; aspect-ratio: 4 / 5; object-fit: cover; object-position: 50% 30%; }
.member__text { grid-column: 7 / 13; }
.member--1 .member__photo { grid-column: 8 / 13; grid-row: 1; }
.member--1 .member__text { grid-column: 1 / 7; grid-row: 1; }
.member__name { font-size: var(--step-head); line-height: 1.02; letter-spacing: -.03em; }
html:lang(zh-CN) .member__name { letter-spacing: .06em; }
.member__bio { margin-top: clamp(24px, 3vw, 40px); }
.member__bio p + p { margin-top: .8em; }
.member__bio a { text-decoration-color: var(--seal); }
.member__bio a:hover { text-decoration-color: currentColor; }

/* contact: the BP and its seal */
.bp { padding: clamp(36px, 5vw, 80px) var(--m) 0; }
.bp .head__statement { margin-top: clamp(16px, 2vw, 28px); font-size: var(--step-lead); max-width: 34em; }
.bp__desk { margin-top: clamp(32px, 4vw, 56px); display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); column-gap: var(--gap); align-items: center; }
.bp__form { grid-column: 1 / 7; display: grid; gap: 20px; justify-items: start; }
.bp__label { font-size: var(--step-lead); font-weight: 700; line-height: 1.3; }
.bp__label a { font-weight: 500; margin-left: .4em; }
.field { display: grid; gap: 6px; width: min(100%, 520px); }
.field span { color: var(--muted); }
.field input { font: inherit; font-size: var(--step-lead); color: var(--paper-ink); background: var(--paper); border: 0; border-radius: 0; padding: 12px 16px; min-height: 56px; width: 100%; }
.field input:focus-visible { outline: 3px solid var(--seal); outline-offset: 0; }
.bp__note { color: var(--muted); font-size: var(--step-small); margin-top: -8px; }
.seal { grid-column: 8 / 13; width: 100%; max-width: 440px; justify-self: end; aspect-ratio: 1; }
.seal rect { fill: var(--seal); }
.seal { transition: transform .18s var(--ease); }
.seal.is-pressed { transform: scale(.965) rotate(-.6deg); }
.seal text { fill: var(--paper); font-family: var(--cjk); font-weight: 900; }
.seal .is-latin { font-family: "Epilogue", var(--cjk); }

/* contact: WeChat and the offices in display rows */
.wechat { margin-top: var(--section); padding: 0 var(--m); display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); column-gap: var(--gap); align-items: end; }
.wechat .section-title { grid-column: 1 / 7; }
.wechat__account { grid-column: 1 / 7; font-size: var(--step-head); font-weight: 400; line-height: 1.1; margin-top: 8px; }
.wechat__qr { grid-column: 9 / 13; grid-row: 1 / 3; width: 100%; max-width: 260px; justify-self: end; }
.offices { margin-top: var(--section); }
.offices .section-title { padding: 0 var(--m); margin-bottom: clamp(24px, 3vw, 40px); }
.office { background: var(--deep); }
.office:nth-child(2) { background: var(--lift); }
.row { display: flex; align-items: end; justify-content: space-between; gap: 24px; min-height: clamp(72px, 7.4vw, 112px); padding: 12px var(--m) 14px; font-size: clamp(1.375rem, .9rem + 2vw, 2.75rem); line-height: 1.15; }
.row a { text-decoration-color: var(--seal); }
.row a:hover { text-decoration-color: currentColor; }
.row--city { font-weight: 900; font-size: var(--step-head); align-items: center; padding-top: clamp(20px, 2.4vw, 32px); }
.row__photo { flex: none; width: clamp(120px, 12vw, 176px); aspect-ratio: 1; object-fit: cover; border-radius: 50%; }

/* the footer: paper, the name across the width */
.sheet { position: relative; z-index: 1; background: var(--ground); padding-bottom: var(--section); }
.foot { position: sticky; bottom: 0; z-index: 0; min-height: 88svh; display: grid; grid-template-rows: auto 1fr auto auto; padding: clamp(32px, 4vw, 56px) var(--m) clamp(16px, 2vw, 24px); background: var(--paper); color: var(--paper-ink); }
.foot__cols { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: var(--gap); font-size: var(--step-body); line-height: 1.5; }
.foot__col li + li { margin-top: 10px; }
.foot__first { display: block; font-weight: 700; }
.foot__col a { text-decoration-color: var(--seal); transition: text-decoration-color .2s; }
.foot__col a:hover { text-decoration-color: currentColor; }
.foot__credits summary { cursor: pointer; font-weight: 700; padding: 2px 0; }
.foot__credits ul { margin-top: 10px; }
.foot__credits li + li { margin-top: 8px; }
.foot__mark { grid-row: 3; width: 100%; height: auto; margin-top: 32px; overflow: visible; }
.foot__mark text { fill: var(--paper-ink); font-family: var(--font); font-weight: 900; font-size: 262px; }
html:lang(en) .foot__mark text { font-size: 236px; letter-spacing: -.04em; }
.foot__legal { grid-row: 4; margin-top: 16px; font-size: var(--step-small); }

/* entrances: only when the script runs and the reader has not asked for less motion.
   "self" rises as one block; "group" raises its parts one after another, 80ms apart. */
@media (prefers-reduced-motion: no-preference) {
  .js [data-reveal="self"] { opacity: 0; transform: translateY(24px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
  .js [data-reveal="self"].is-in { opacity: 1; transform: none; }
  .js [data-reveal="group"] > * { opacity: 0; transform: translateY(28px) rotate(var(--r, 0deg)); transition: opacity .7s var(--ease), transform .7s var(--ease); transition-delay: calc(var(--n, 0) * 80ms); }
  .js [data-reveal="group"].is-in > * { opacity: 1; transform: rotate(var(--r, 0deg)); }
  .js .slips.is-in > .slip:hover { transform: rotate(0deg) translateY(-6px); transition-delay: 0s; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition-duration: .01ms !important; animation: none !important; scroll-behavior: auto !important; }
}

/* tablet */
@media (max-width: 1080px) {
  .plate figcaption { left: auto; right: calc(100% + 24px); text-align: right; }
  .hero__object { margin-right: 0; }
  .slip:nth-child(n) { margin-top: 0; }
  .slips { padding-inline: 12px; }
  .slip:nth-child(1) { grid-column: 1 / 8; }
  .slip:nth-child(2) { grid-column: 8 / 13; margin-top: 40px; }
  .slip:nth-child(3) { grid-column: 1 / 6; }
  .slip:nth-child(4) { grid-column: 6 / 13; margin-top: 32px; }
  .slip:nth-child(5) { grid-column: 1 / 7; }
  .slip:nth-child(6) { grid-column: 7 / 13; margin-top: 40px; }
  .foot__cols { grid-template-columns: repeat(2, minmax(0, 1fr)); row-gap: 32px; }
  .board { grid-template-columns: repeat(5, minmax(0, 1fr)); grid-auto-rows: 15vw; }
  .board > .tile { grid-column: span 3; grid-row: span 3; }
  .board > .b2, .board > .b4 { grid-column: span 2; }
  .board > .b6, .board > .b7 { grid-column: 1 / -1; grid-row: span 2; }
  .board > .tile--head { grid-column: 1 / -1; grid-row: span 2; }
  .board > .b3 { grid-column: 1 / -1; grid-row: span 3; }
  .b6 .tile__cap { max-width: 100%; }
  .b6 .tile__pic { width: 120%; top: -18%; right: -14%; }
}

/* phone */
@media (max-width: 760px) {
  .bar { flex-wrap: wrap; row-gap: 4px; padding-top: 12px; padding-bottom: 8px; }
  .bar__lang { margin-left: auto; }
  .bar__nav { order: 3; width: 100%; margin: 0; }
  .bar__nav ul { justify-content: space-between; gap: 8px; }
  .hero { padding-top: 8px; }
  .hero__object { width: 52vw; }
  .plate figcaption { position: static; display: none; }
  .hero__mark { letter-spacing: .45em; padding-left: .45em; font-size: 15px; margin-top: 20px; }
  .hero__facts { grid-template-columns: 1fr; gap: 6px; }
  .letter .section-title { margin-bottom: 28px; }
  .letter__body { columns: 1; }
  html:lang(zh-CN) .letter__body { text-align: left; }
  .letter__sign { grid-column: 1 / -1; justify-content: flex-start; }
  .slips { grid-template-columns: 1fr; gap: 0; padding-inline: 0; }
  .slip:nth-child(n) { grid-column: 1; }
  .slip { width: 88%; }
  .slip:nth-child(n) { margin-top: -10px; }
  .slip:nth-child(1) { margin-top: 0; }
  .slip:nth-child(odd) { --r: -2deg; justify-self: start; }
  .slip:nth-child(even) { --r: 2.5deg; justify-self: end; }
  .board { grid-template-columns: 1fr 1fr; grid-auto-rows: 28vw; gap: 6px; grid-auto-flow: row dense; }
  .board > .tile--head { grid-column: 1 / -1; grid-row: span 3; }
  .board > .b1, .board > .b4, .board > .b5, .board > .b6 { grid-column: 1 / -1; grid-row: span 3; }
  .board > .b3 { grid-column: 1 / -1; grid-row: span 2; }
  .board > .b2, .board > .b7 { grid-column: span 1; grid-row: span 2; }
  .b6 .tile__cap { max-width: 100%; }
  .b6 .tile__pic { width: 120%; top: -18%; right: -14%; }
  .head { grid-template-columns: 1fr; }
  .head__title, .head__statement, .head--team .head__title { grid-column: 1; }
  .head__plate { grid-column: 1; grid-row: auto; width: 64%; margin-top: 32px; }
  .diptych { grid-column: 1; grid-row: auto; margin-top: 28px; }
  .work { grid-template-columns: 1fr; padding-bottom: 48px; }
  .work__text, .work__logo { grid-column: 1; grid-row: auto; }
  .work__logo { position: static; margin-bottom: 18px; }
  .work__name { font-size: 9vw; }
  .member { grid-template-columns: 1fr; row-gap: 28px; }
  .member__photo, .member__text, .member--1 .member__photo, .member--1 .member__text { grid-column: 1; grid-row: auto; }
  .bp__desk { grid-template-columns: 1fr; row-gap: 32px; }
  .bp__form, .seal { grid-column: 1; }
  .seal { justify-self: start; max-width: 72vw; }
  .wechat { grid-template-columns: 1fr; }
  .wechat .section-title, .wechat__account, .wechat__qr { grid-column: 1; grid-row: auto; }
  .wechat__qr { justify-self: start; margin-top: 24px; max-width: 220px; }
  .row { min-height: 0; padding-top: 14px; padding-bottom: 14px; }
  .row__photo { width: 120px; }
  .foot { min-height: 0; }
  .foot__cols { grid-template-columns: 1fr 1fr; gap: 28px 20px; font-size: 15px; }
  .foot__mark { margin-top: 20svh; }
}