@charset "UTF-8";

:root {
  --copy-blue: #129cf3;
  --copy-blue-dark: #0875bf;
  --copy-blue-pale: #eaf6ff;
  --proof-red: #f05c5c;
  --ink: #0d2b49;
  --ink-soft: #173f66;
  --paper: #f8fbfd;
  --paper-warm: #fffdf8;
  --white: #ffffff;
  --muted: #64788c;
  --line: #9eb6ca;
  --soft-line: #d8e4ed;
  --container: 1200px;
}

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

html {
  overflow-x: hidden;
  scroll-behavior: smooth;
  background: var(--paper);
}

body {
  margin: 0;
  min-width: 320px;
  overflow-x: hidden;
  padding-top: 68px;
  color: var(--ink);
  background:
    linear-gradient(rgba(18, 156, 243, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(18, 156, 243, 0.025) 1px, transparent 1px),
    var(--paper);
  background-size: 28px 28px;
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans CJK SC", Arial, sans-serif;
  font-size: 15px;
  line-height: 1.65;
  text-rendering: optimizeLegibility;
}

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

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

button,
a {
  -webkit-tap-highlight-color: transparent;
}

button {
  font: inherit;
}

ul,
ol,
figure,
blockquote,
p,
h1,
h2,
h3 {
  margin-top: 0;
}

.container {
  width: min(var(--container), calc(100% - 48px));
  margin-inline: auto;
}

.brand-bar {
  position: fixed;
  z-index: 100;
  top: 0;
  right: 0;
  left: 0;
  display: flex;
  height: 68px;
  align-items: center;
  justify-content: space-between;
  padding: 0 28px;
  color: var(--white);
  background: linear-gradient(90deg, #0b91ec, #12a9ff);
  border-bottom: 1px solid rgba(255, 255, 255, 0.45);
}

.brand {
  display: inline-flex;
  min-width: 0;
  align-items: center;
  gap: 11px;
}

.brand img {
  width: 44px;
  height: 44px;
  flex: 0 0 auto;
  border: 1px solid rgba(255, 255, 255, 0.7);
  border-radius: 50%;
}

.brand-copy {
  display: grid;
  line-height: 1.12;
}

.brand-copy strong {
  font-size: 20px;
  letter-spacing: 0.02em;
}

.brand-copy small {
  margin-top: 4px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  opacity: 0.9;
}

.brand-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.top-download {
  display: inline-flex;
  min-height: 38px;
  align-items: center;
  justify-content: center;
  padding: 0 20px;
  border: 1px solid var(--white);
  background: rgba(6, 67, 112, 0.42);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.04em;
}

.top-download:hover {
  color: var(--ink);
  background: var(--white);
}

.menu-button {
  display: none;
  width: 40px;
  height: 40px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  padding: 0;
  border: 1px solid rgba(255, 255, 255, 0.9);
  color: var(--white);
  background: transparent;
  cursor: pointer;
}

.menu-button span {
  width: 18px;
  height: 2px;
  background: currentColor;
}

.hero {
  display: grid;
  min-height: 620px;
  grid-template-columns: clamp(190px, 14vw, 230px) minmax(0, 1fr);
  border-bottom: 1px solid var(--ink);
  background: var(--white);
}

.proof-nav {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 22px 16px 32px;
  background: rgba(255, 255, 255, 0.98);
  border-right: 1px solid var(--ink);
}

.proof-nav ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.proof-nav li + li {
  margin-top: 10px;
}

.proof-nav a {
  display: grid;
  min-height: 54px;
  align-items: center;
  grid-template-columns: 26px minmax(0, 1fr) auto;
  gap: 8px;
  padding: 0 12px;
  border: 1px solid var(--soft-line);
  background: var(--white);
}

.proof-nav a:hover,
.proof-nav a.is-active {
  border-color: var(--copy-blue);
  color: var(--copy-blue-dark);
  background: var(--copy-blue-pale);
}

.proof-nav .nav-icon {
  color: var(--copy-blue);
  font-size: 18px;
  font-style: normal;
  font-weight: 900;
  text-align: center;
}

.proof-nav b {
  font-size: 14px;
}

.proof-nav em {
  color: var(--muted);
  font-size: 12px;
  font-style: normal;
  font-weight: 800;
}

.proof-nav > p {
  margin: 0;
  padding: 22px 10px 0;
  border-top: 1px solid var(--soft-line);
  color: var(--muted);
  font-size: 12px;
  line-height: 1.8;
}

.proof-nav > p span {
  display: block;
  margin-bottom: 6px;
  color: var(--copy-blue-dark);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.12em;
}

.hero-visual {
  position: relative;
  min-width: 0;
  overflow: hidden;
  background-image:
    linear-gradient(90deg, rgba(6, 26, 45, 0.24), rgba(6, 26, 45, 0.02) 56%, rgba(6, 26, 45, 0.16)),
    url("../images/bjt.jpg");
  background-position: center 26%;
  background-size: cover;
}

.hero-visual::after {
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  height: 76px;
  content: "";
  background: linear-gradient(to top, rgba(6, 25, 44, 0.34), transparent);
  pointer-events: none;
}

.hero-panel {
  position: relative;
  z-index: 2;
  width: min(560px, 58%);
  margin: 74px 0 70px clamp(36px, 5vw, 90px);
  padding: 32px 36px 34px;
  color: var(--white);
  background: rgba(5, 27, 47, 0.9);
  border-left: 4px solid var(--copy-blue);
  box-shadow: 18px 18px 0 rgba(18, 156, 243, 0.15);
}

.eyebrow {
  margin-bottom: 9px;
  color: var(--copy-blue);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.13em;
  line-height: 1.4;
  text-transform: uppercase;
}

.eyebrow--blue {
  color: var(--copy-blue-dark);
}

.hero-panel h1 {
  margin: 0;
  font-size: clamp(58px, 6.2vw, 92px);
  letter-spacing: -0.07em;
  line-height: 0.98;
  text-shadow: 3px 3px 0 rgba(18, 156, 243, 0.52);
}

.hero-slogan {
  display: inline-block;
  margin: 24px 0 16px;
  padding: 5px 10px 7px;
  color: var(--ink);
  background: var(--white);
  font-size: clamp(23px, 2.2vw, 34px);
  font-weight: 900;
  letter-spacing: -0.045em;
  line-height: 1.18;
  box-shadow: 8px 8px 0 var(--copy-blue);
}

.hero-intro {
  max-width: 470px;
  margin-bottom: 18px;
  color: #d7e6f2;
  font-size: 14px;
  line-height: 1.85;
}

.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 22px;
  padding: 0;
  list-style: none;
}

.hero-tags li {
  padding: 4px 10px;
  border: 1px solid rgba(255, 255, 255, 0.58);
  font-size: 12px;
  font-weight: 800;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 20px;
}

.hero-actions > a {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  gap: 28px;
  padding: 0 18px;
  color: var(--white);
  background: var(--copy-blue);
  font-size: 13px;
  font-weight: 900;
}

.hero-actions > a:hover {
  color: var(--ink);
  background: var(--white);
}

.age-label {
  color: #b9ccdc;
  font-size: 12px;
}

.hero-note {
  position: absolute;
  z-index: 2;
  top: 80px;
  right: 34px;
  margin: 0;
  padding: 12px 16px;
  color: var(--copy-blue-dark);
  background: rgba(255, 255, 255, 0.92);
  font-size: 14px;
  font-weight: 900;
  line-height: 1.55;
  transform: rotate(-5deg);
}

.proof-stamp {
  position: absolute;
  z-index: 2;
  right: 54px;
  bottom: 46px;
  display: grid;
  width: 96px;
  height: 96px;
  place-items: center;
  border: 5px double var(--copy-blue);
  border-radius: 50%;
  color: var(--copy-blue);
  font-size: 18px;
  font-weight: 900;
  letter-spacing: 0.1em;
  line-height: 1.05;
  text-align: center;
  transform: rotate(-10deg);
}

.paper-section {
  position: relative;
  padding: 76px 0;
  background: rgba(248, 251, 253, 0.94);
  border-bottom: 1px solid var(--soft-line);
  scroll-margin-top: 78px;
}

.paper-section:nth-of-type(2n + 1) {
  background: rgba(255, 253, 248, 0.96);
}

.section-heading {
  display: flex;
  align-items: flex-start;
  margin-bottom: 28px;
}

.heading-rule {
  width: 4px;
  height: 34px;
  flex: 0 0 auto;
  margin: 7px 14px 0 0;
  background: var(--copy-blue);
}

.section-heading h2 {
  margin-bottom: 7px;
  font-size: clamp(30px, 3.3vw, 47px);
  letter-spacing: -0.055em;
  line-height: 1.08;
}

.section-heading div > p:last-child {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 13px;
}

.section-heading--wide {
  align-items: end;
}

.section-heading--wide > p {
  margin: 0 0 6px auto;
  color: var(--muted);
  font-size: 13px;
}

.proof-layout {
  display: grid;
  align-items: stretch;
  grid-template-columns: minmax(360px, 0.82fr) minmax(0, 1.4fr);
  gap: 34px;
}

.proof-rows {
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
  list-style: none;
}

.proof-rows li {
  display: grid;
  min-height: 49px;
  align-items: center;
  grid-template-columns: 42px 92px minmax(0, 1fr) auto;
  gap: 8px;
  padding: 0 8px;
  border-bottom: 1px solid var(--soft-line);
}

.proof-rows span,
.proof-rows em {
  color: var(--copy-blue-dark);
  font-size: 12px;
  font-style: normal;
  font-weight: 900;
}

.proof-rows strong {
  font-size: 13px;
}

.proof-rows p {
  overflow: hidden;
  margin: 0;
  color: var(--muted);
  font-size: 12px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.proof-rows li:nth-child(2) em,
.proof-rows li:nth-child(4) em {
  color: var(--proof-red);
}

.cover-strip {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.cover-strip figure {
  display: grid;
  min-width: 0;
  margin: 0;
  grid-template-rows: 250px minmax(116px, auto);
  border: 1px solid var(--line);
  background: var(--white);
}

.cover-strip img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 26%;
}

.cover-strip figure:nth-child(2) img,
.cover-strip figure:nth-child(3) img {
  object-position: center;
}

.cover-strip figcaption {
  position: relative;
  display: flex;
  min-width: 0;
  flex-direction: column;
  padding: 15px 38px 13px 15px;
}

.cover-strip figcaption strong {
  margin-bottom: 5px;
  font-size: 18px;
}

.cover-strip figcaption span {
  color: var(--muted);
  font-size: 12px;
}

.cover-strip figcaption b {
  position: absolute;
  right: 14px;
  bottom: 12px;
  color: var(--copy-blue-dark);
  font-size: 18px;
}

.discovery {
  padding-top: 68px;
}

.value-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.value-grid article {
  position: relative;
  display: grid;
  min-height: 180px;
  align-items: center;
  grid-template-columns: 66px 58px minmax(0, 1fr);
  gap: 16px;
  padding: 24px 24px 22px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.72);
}

.value-grid article > span {
  align-self: start;
  color: #8acaf2;
  font-size: 42px;
  font-weight: 900;
  line-height: 1;
}

.value-grid i {
  position: relative;
  display: block;
  width: 48px;
  height: 43px;
  border: 3px solid var(--ink);
  background: var(--copy-blue);
}

.folder-icon::before {
  position: absolute;
  top: -10px;
  left: 4px;
  width: 21px;
  height: 8px;
  content: "";
  border: 3px solid var(--ink);
  border-bottom: 0;
  background: var(--copy-blue);
}

.bell-icon {
  border-radius: 24px 24px 7px 7px;
}

.bell-icon::before {
  position: absolute;
  top: -9px;
  left: 17px;
  width: 9px;
  height: 9px;
  content: "";
  border: 3px solid var(--ink);
  border-radius: 50%;
  background: var(--copy-blue);
}

.mark-icon {
  width: 36px !important;
  margin-left: 6px;
  border-bottom: 0 !important;
}

.mark-icon::after {
  position: absolute;
  right: 4px;
  bottom: -16px;
  left: 4px;
  height: 25px;
  content: "";
  background: var(--copy-blue);
  border-right: 3px solid var(--ink);
  border-bottom: 3px solid var(--ink);
  transform: rotate(45deg) skew(8deg, 8deg);
}

.value-grid h3 {
  margin-bottom: 7px;
  font-size: 18px;
}

.value-grid p {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
}

.archive-layout {
  display: grid;
  align-items: stretch;
  grid-template-columns: minmax(360px, 0.85fr) minmax(0, 1.2fr);
  gap: 34px;
}

.archive-copy {
  display: flex;
  min-width: 0;
  flex-direction: column;
  padding: 34px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.72);
}

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

.archive-steps li {
  display: grid;
  align-items: center;
  grid-template-columns: 42px minmax(0, 1fr);
  gap: 14px;
  padding: 13px 0;
  border-bottom: 1px solid var(--soft-line);
}

.archive-steps b {
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  border-radius: 50%;
  color: var(--white);
  background: var(--copy-blue);
  font-size: 14px;
}

.archive-steps h3 {
  margin-bottom: 2px;
  font-size: 15px;
}

.archive-steps p {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
}

.archive-copy blockquote {
  margin: auto 0 0;
  padding: 22px 0 0 40%;
  color: var(--copy-blue-dark);
  font-size: 15px;
  font-weight: 900;
  line-height: 1.7;
  transform: rotate(-3deg);
}

.archive-visual {
  position: relative;
  min-height: 570px;
  overflow: hidden;
  margin: 0;
  border: 1px solid var(--ink);
  background: var(--ink);
}

.archive-visual::before,
.archive-visual::after {
  position: absolute;
  z-index: 2;
  width: 56px;
  height: 18px;
  content: "";
  background: rgba(18, 156, 243, 0.78);
  transform: rotate(-8deg);
}

.archive-visual::before {
  top: 9px;
  right: -12px;
}

.archive-visual::after {
  bottom: 10px;
  left: -12px;
}

.archive-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 30%;
}

.archive-visual figcaption {
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 17px 20px;
  color: var(--white);
  background: rgba(5, 27, 47, 0.9);
}

.archive-visual figcaption span {
  flex: 0 0 auto;
  padding: 5px 9px;
  border: 1px solid var(--copy-blue);
  color: var(--copy-blue);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.08em;
}

.archive-visual figcaption p {
  margin: 0;
  font-size: 12px;
  text-align: right;
}

.route-grid {
  display: grid;
  margin: 0;
  padding: 0;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
  list-style: none;
}

.route-grid li {
  position: relative;
  display: grid;
  min-height: 160px;
  align-items: center;
  grid-template-columns: 48px minmax(0, 1fr);
  gap: 14px;
  padding: 42px 20px 20px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.58);
}

.route-grid li > span {
  position: absolute;
  top: 11px;
  left: 15px;
  color: #8acaf2;
  font-size: 20px;
  font-weight: 900;
}

.route-grid i {
  color: var(--copy-blue-dark);
  font-size: 31px;
  font-style: normal;
  font-weight: 900;
  text-align: center;
}

.route-grid h3 {
  margin-bottom: 4px;
  font-size: 17px;
}

.route-grid p {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
}

.faq-gallery-layout {
  display: grid;
  align-items: start;
  grid-template-columns: minmax(330px, 0.82fr) minmax(0, 1.25fr);
  gap: 32px;
}

.accordion {
  border-top: 1px solid var(--line);
}

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

.accordion button {
  display: flex;
  width: 100%;
  min-height: 54px;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 0 6px;
  border: 0;
  color: var(--ink);
  background: transparent;
  font-size: 13px;
  font-weight: 800;
  text-align: left;
  cursor: pointer;
}

.accordion button b {
  color: var(--copy-blue-dark);
  font-size: 19px;
}

.accordion button[aria-expanded="true"] b {
  transform: rotate(180deg);
}

.accordion article > div {
  padding: 0 32px 17px 6px;
  color: var(--muted);
}

.accordion article > div p {
  margin: 0;
  font-size: 13px;
}

.accordion a {
  color: var(--copy-blue-dark);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.gallery-grid {
  display: grid;
  height: 500px;
  grid-template-columns: 1.08fr 0.92fr;
  grid-template-rows: repeat(2, minmax(0, 1fr));
  gap: 9px;
}

.gallery-item {
  position: relative;
  min-width: 0;
  min-height: 0;
  overflow: hidden;
  margin: 0;
  border: 1px solid var(--ink);
  background: var(--ink);
}

.gallery-item--lead {
  grid-row: 1 / 3;
}

.gallery-item--wide {
  grid-column: 2;
  grid-row: 1;
}

.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.gallery-item--lead img {
  object-position: center 34%;
}

.gallery-item--wide img {
  object-position: center 30%;
}

.gallery-item figcaption {
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  padding: 12px 14px;
  color: var(--white);
  background: rgba(5, 27, 47, 0.86);
  font-size: 12px;
  font-weight: 800;
}

.next-file-layout {
  display: grid;
  align-items: stretch;
  grid-template-columns: minmax(0, 1.35fr) minmax(320px, 0.65fr);
  gap: 44px;
}

.recommendations {
  border-top: 1px solid var(--line);
}

.recommendations article {
  display: grid;
  min-height: 94px;
  align-items: center;
  grid-template-columns: 74px minmax(0, 1fr) auto;
  gap: 16px;
  padding: 10px 9px;
  border-bottom: 1px solid var(--line);
}

.recommendations img {
  width: 74px;
  height: 72px;
  object-fit: cover;
}

.recommendations h3 {
  margin-bottom: 4px;
  font-size: 15px;
}

.recommendations p {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
}

.recommendations article > span {
  color: var(--copy-blue-dark);
  font-size: 22px;
}

.editor-note {
  position: relative;
  padding: 52px 38px 38px;
  border: 2px solid var(--line);
  background: rgba(255, 255, 255, 0.68);
  box-shadow: inset 0 0 0 7px rgba(18, 156, 243, 0.06);
}

.paperclip {
  position: absolute;
  top: 20px;
  right: 24px;
  width: 12px;
  height: 40px;
  border: 2px solid var(--copy-blue-dark);
  border-radius: 9px;
  transform: rotate(14deg);
}

.editor-note h2 {
  margin-bottom: 18px;
  font-size: 28px;
  letter-spacing: -0.04em;
  line-height: 1.2;
}

.editor-note > p:not(.eyebrow) {
  color: var(--muted);
  font-size: 14px;
  line-height: 2;
}

.editor-note strong {
  display: block;
  margin-top: 30px;
  color: var(--copy-blue-dark);
  font-size: 13px;
  text-align: right;
}

.margin-notes {
  padding: 72px 0 82px;
  color: var(--white);
  background:
    linear-gradient(rgba(18, 156, 243, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(18, 156, 243, 0.045) 1px, transparent 1px),
    var(--ink);
  background-size: 28px 28px;
  scroll-margin-top: 78px;
}

.dark-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 28px;
}

.dark-heading h2 {
  margin: 0;
  font-size: clamp(32px, 3.5vw, 50px);
  letter-spacing: -0.055em;
  line-height: 1.05;
}

.dark-heading > p {
  margin: 0 0 5px;
  color: #9eb5c9;
  font-size: 12px;
}

.comment-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.comment-card {
  min-width: 0;
  padding: 20px;
  border: 1px solid #426282;
  background: rgba(255, 255, 255, 0.045);
}

.comment-card header {
  display: grid;
  align-items: center;
  grid-template-columns: 44px minmax(0, 1fr) auto;
  gap: 11px;
  margin-bottom: 15px;
}

.comment-card img {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  object-fit: cover;
}

.comment-card header > div {
  display: grid;
}

.comment-card strong {
  overflow: hidden;
  font-size: 13px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.comment-card header span {
  color: #ffd04a;
  font-size: 12px;
  letter-spacing: 0.06em;
}

.comment-card time {
  color: #92a9bd;
  font-size: 12px;
  white-space: nowrap;
}

.comment-card > p {
  margin: 0;
  color: #d1dde7;
  font-size: 13px;
  line-height: 1.85;
}

.comments-empty {
  grid-column: 1 / -1;
  margin: 0;
  padding: 28px;
  border: 1px solid #426282;
  color: #b8c9d7;
  font-size: 13px;
  text-align: center;
}

.download-section {
  position: relative;
  overflow: hidden;
  padding: 104px 0 110px;
  background: var(--white);
  border-bottom: 1px solid var(--ink);
  scroll-margin-top: 78px;
}

.download-section::before {
  position: absolute;
  top: 20px;
  bottom: 20px;
  left: 4vw;
  width: 210px;
  content: "";
  opacity: 0.22;
  background: repeating-linear-gradient(-8deg, transparent 0 10px, var(--copy-blue) 11px 12px);
  transform: skew(-10deg);
}

.download-inner {
  position: relative;
  z-index: 1;
  text-align: center;
}

.download-section h2 {
  margin-bottom: 12px;
  font-size: clamp(40px, 4.5vw, 62px);
  letter-spacing: -0.065em;
  line-height: 1.06;
}

.download-section .download-inner > p:not(.eyebrow) {
  margin-bottom: 24px;
  color: var(--muted);
  font-size: 14px;
}

.download-section a {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  gap: 28px;
  padding: 0 24px;
  color: var(--white);
  background: var(--copy-blue);
  border: 1px solid var(--copy-blue-dark);
  font-size: 14px;
  font-weight: 900;
}

.download-section a:hover {
  color: var(--white);
  background: var(--ink);
}

.site-footer {
  padding: 42px 0 24px;
  color: var(--white);
  background: var(--ink);
}

.footer-main {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}

.footer-brand > a {
  display: flex;
  align-items: center;
  gap: 10px;
}

.footer-brand img {
  width: 42px;
  height: 42px;
  border-radius: 50%;
}

.footer-brand a span {
  display: grid;
  line-height: 1.2;
}

.footer-brand strong {
  font-size: 17px;
}

.footer-brand small {
  margin-top: 3px;
  color: #9fb4c5;
  font-size: 12px;
}

.footer-brand > p {
  margin: 8px 0 0 52px;
  color: #9fb4c5;
  font-size: 12px;
}

.site-footer nav ul {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 10px 24px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-footer nav a {
  color: #c2d1dc;
  font-size: 12px;
}

.site-footer nav a:hover {
  color: var(--copy-blue);
}

.copyright {
  width: min(var(--container), calc(100% - 48px));
  margin: 34px auto 0;
  padding-top: 18px;
  border-top: 1px solid #294b6c;
  color: #89a4b9;
  font-size: 12px;
  text-align: center;
}

.back-to-top {
  position: fixed;
  z-index: 70;
  right: 20px;
  bottom: 20px;
  display: grid;
  width: 44px;
  height: 44px;
  place-items: center;
  border: 1px solid var(--ink);
  color: var(--white);
  background: var(--copy-blue);
  font-size: 20px;
  font-weight: 900;
  opacity: 0;
  pointer-events: none;
  transform: translateY(10px);
  cursor: pointer;
}

.back-to-top.is-visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

a:focus-visible,
button:focus-visible {
  outline: 3px solid var(--proof-red);
  outline-offset: 3px;
}

@media (prefers-reduced-motion: no-preference) {
  .top-download,
  .proof-nav a,
  .hero-actions > a,
  .download-section a,
  .back-to-top,
  .accordion button b {
    transition: color 150ms ease, background-color 150ms ease, opacity 150ms ease, transform 150ms ease;
  }
}

@media (max-width: 1080px) {
  .hero-panel {
    width: min(590px, 70%);
    margin-left: 34px;
  }

  .hero-note {
    display: none;
  }

  .proof-layout,
  .archive-layout,
  .faq-gallery-layout,
  .next-file-layout {
    grid-template-columns: 1fr;
  }

  .cover-strip figure {
    grid-template-rows: 310px minmax(108px, auto);
  }

  .archive-visual {
    min-height: 620px;
  }

  .gallery-grid {
    height: 640px;
  }

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

@media (max-width: 780px) {
  body {
    padding-top: 60px;
  }

  .container {
    width: min(100% - 32px, var(--container));
  }

  .brand-bar {
    height: 60px;
    padding: 0 12px;
  }

  .brand img {
    width: 38px;
    height: 38px;
  }

  .brand-copy strong {
    font-size: 17px;
  }

  .brand-copy small {
    font-size: 12px;
  }

  .top-download {
    min-height: 36px;
    padding: 0 12px;
    font-size: 12px;
  }

  .menu-button {
    display: flex;
  }

  .hero {
    display: block;
    min-height: 660px;
  }

  .proof-nav {
    position: fixed;
    z-index: 90;
    top: 60px;
    right: 0;
    left: 0;
    display: block;
    min-width: 0;
    padding: 12px 16px;
    border-right: 0;
    border-bottom: 1px solid var(--ink);
    opacity: 0;
    pointer-events: none;
    transform: translateY(-12px);
  }

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

  .proof-nav ul {
    display: flex;
    overflow-x: auto;
    gap: 8px;
    scrollbar-width: none;
  }

  .proof-nav ul::-webkit-scrollbar {
    display: none;
  }

  .proof-nav li + li {
    margin-top: 0;
  }

  .proof-nav a {
    min-width: max-content;
    min-height: 40px;
    grid-template-columns: 20px auto;
    padding: 0 11px;
  }

  .proof-nav em,
  .proof-nav > p {
    display: none;
  }

  .proof-nav .nav-icon {
    font-size: 15px;
  }

  .proof-nav b {
    font-size: 12px;
  }

  .hero-visual {
    min-height: 660px;
    background-position: 51% 22%;
  }

  .hero-panel {
    position: absolute;
    right: 16px;
    bottom: 38px;
    left: 16px;
    width: auto;
    margin: 0;
    padding: 27px 24px 28px;
    box-shadow: 9px 9px 0 rgba(18, 156, 243, 0.2);
  }

  .hero-panel h1 {
    font-size: clamp(54px, 16vw, 76px);
  }

  .hero-slogan {
    margin-top: 22px;
    font-size: clamp(23px, 7.2vw, 31px);
  }

  .hero-intro {
    font-size: 13px;
  }

  .proof-stamp {
    top: 22px;
    right: 18px;
    bottom: auto;
    width: 74px;
    height: 74px;
    border-width: 4px;
    font-size: 14px;
  }

  .paper-section {
    padding: 58px 0;
    scroll-margin-top: 68px;
  }

  .section-heading--wide {
    display: block;
  }

  .section-heading--wide > .heading-rule {
    float: left;
  }

  .section-heading--wide > p {
    clear: both;
    margin: 13px 0 0;
  }

  .section-heading h2 {
    font-size: clamp(29px, 9vw, 41px);
  }

  .proof-layout {
    gap: 30px;
  }

  .cover-strip {
    overflow-x: auto;
    grid-template-columns: repeat(3, minmax(235px, 72vw));
    padding-bottom: 8px;
    scroll-snap-type: x proximity;
  }

  .cover-strip figure {
    grid-template-rows: 290px minmax(108px, auto);
    scroll-snap-align: start;
  }

  .value-grid {
    grid-template-columns: 1fr;
  }

  .value-grid article {
    min-height: 148px;
  }

  .archive-copy {
    padding: 26px 22px;
  }

  .archive-copy blockquote {
    padding-left: 30%;
  }

  .archive-visual {
    min-height: 500px;
  }

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

  .gallery-grid {
    height: auto;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    grid-template-rows: auto;
  }

  .gallery-item {
    aspect-ratio: 1 / 0.86;
  }

  .gallery-item--lead {
    aspect-ratio: 1.45 / 1;
    grid-column: 1 / -1;
    grid-row: auto;
  }

  .gallery-item--wide {
    grid-column: auto;
    grid-row: auto;
  }

  .dark-heading {
    display: block;
  }

  .dark-heading > p {
    margin-top: 12px;
  }

  .comment-grid {
    grid-template-columns: 1fr;
  }

  .margin-notes {
    padding: 60px 0 68px;
    scroll-margin-top: 68px;
  }

  .download-section {
    padding: 90px 0 96px;
    scroll-margin-top: 68px;
  }

  .download-section h2 {
    font-size: clamp(35px, 11vw, 49px);
  }

  .footer-main {
    flex-direction: column;
    text-align: center;
  }

  .footer-brand > a {
    justify-content: center;
  }

  .footer-brand > p {
    margin-left: 0;
  }

  .site-footer nav ul {
    justify-content: center;
  }

  .copyright {
    width: calc(100% - 32px);
  }
}

@media (max-width: 480px) {
  .brand {
    gap: 7px;
  }

  .brand-copy small {
    display: none;
  }

  .top-download {
    padding: 0 9px;
  }

  .hero-actions {
    align-items: flex-start;
    flex-direction: column;
    gap: 12px;
  }

  .hero-panel {
    padding: 24px 20px;
  }

  .hero-intro {
    line-height: 1.7;
  }

  .proof-rows li {
    grid-template-columns: 36px 78px minmax(0, 1fr) auto;
  }

  .proof-rows p {
    font-size: 12px;
  }

  .value-grid article {
    grid-template-columns: 52px 45px minmax(0, 1fr);
    gap: 12px;
    padding: 22px 16px;
  }

  .value-grid article > span {
    font-size: 34px;
  }

  .value-grid i {
    transform: scale(0.82);
    transform-origin: left center;
  }

  .archive-copy blockquote {
    padding-left: 15%;
  }

  .archive-visual {
    min-height: 420px;
  }

  .archive-visual figcaption {
    display: block;
  }

  .archive-visual figcaption p {
    margin-top: 9px;
    text-align: left;
  }

  .route-grid {
    grid-template-columns: 1fr;
  }

  .route-grid li {
    min-height: 128px;
  }

  .gallery-grid {
    grid-template-columns: 1fr;
  }

  .gallery-item,
  .gallery-item--lead {
    aspect-ratio: 1.25 / 1;
    grid-column: auto;
  }

  .recommendations article {
    grid-template-columns: 62px minmax(0, 1fr) auto;
    gap: 12px;
  }

  .recommendations img {
    width: 62px;
    height: 66px;
  }

  .editor-note {
    padding: 45px 25px 30px;
  }

  .comment-card header {
    grid-template-columns: 42px minmax(0, 1fr);
  }

  .comment-card time {
    grid-column: 2;
  }

  .download-section::before {
    left: -100px;
  }
}