@charset "UTF-8";

:root {
  --blue: #2397e8;
  --blue-deep: #0e68bd;
  --navy: #14233b;
  --ink: #1d2a3d;
  --muted: #66758a;
  --line: #dbe7f1;
  --soft: #f5f9fc;
  --orange: #ff8a22;
  --white: #ffffff;
  --radius: 5px;
  --content: 1200px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  min-width: 320px;
  margin: 0;
  color: var(--ink);
  background: var(--white);
  font-family: "Microsoft YaHei", "PingFang SC", sans-serif;
}

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

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

button {
  font: inherit;
}

img {
  max-width: 100%;
}

.page-width {
  width: min(calc(100% - 48px), var(--content));
  margin-right: auto;
  margin-left: auto;
}

.section-wrap {
  padding: 96px 0;
}

.icon {
  display: inline-flex;
  width: 1em;
  height: 1em;
  flex: 0 0 auto;
}

.icon::before {
  display: block;
  width: 100%;
  height: 100%;
  content: "";
  background: center / contain no-repeat;
}

.icon-download::before {
  background-image: url("../icons/download.svg");
}

.icon-menu::before {
  background-image: url("../icons/menu.svg");
}

.icon-arrow::before {
  background-image: url("../icons/arrow.svg");
}

.icon-bookmark::before {
  background-image: url("../icons/bookmark.svg");
}

.icon-refresh::before {
  background-image: url("../icons/refresh.svg");
}

.icon-cloud::before {
  background-image: url("../icons/cloud.svg");
}

.icon-globe::before {
  background-image: url("../icons/globe.svg");
}

.icon-plus::before {
  background-image: url("../icons/plus.svg");
}

.site-header {
  position: sticky;
  z-index: 20;
  top: 0;
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.97);
}

.nav-shell {
  display: flex;
  width: min(calc(100% - 48px), var(--content));
  min-height: 76px;
  margin: auto;
  align-items: center;
  gap: 28px;
}

.brand {
  display: inline-flex;
  min-width: 158px;
  align-items: center;
  gap: 9px;
  color: var(--navy);
  font-size: 18px;
  font-weight: 800;
}

.brand img {
  width: 35px;
  height: 35px;
  border-radius: var(--radius);
  object-fit: cover;
}

.primary-nav {
  flex: 1;
}

.primary-nav ul {
  display: flex;
  margin: 0;
  padding: 0;
  justify-content: center;
  list-style: none;
  gap: 33px;
}

.primary-nav a {
  padding: 28px 0 24px;
  border-bottom: 2px solid transparent;
  color: var(--muted);
  font-size: 14px;
  font-weight: 700;
}

.primary-nav a:hover,
.primary-nav .is-active {
  border-color: var(--blue);
  color: var(--blue-deep);
}

.nav-download,
.button {
  display: inline-flex;
  min-height: 42px;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 800;
}

.nav-download {
  padding: 0 15px;
  border: 1px solid var(--blue);
  color: var(--blue-deep);
}

.nav-download:hover {
  color: var(--white);
  background: var(--blue);
}

.nav-download:hover .icon::before,
.download a:hover .icon::before {
  filter: brightness(0) invert(1);
}

.menu-toggle,
.mobile-nav {
  display: none;
}

.hero {
  display: grid;
  min-height: 650px;
  grid-template-columns: 1fr 1fr;
  align-items: center;
}

.eyebrow {
  margin: 0 0 13px;
  color: var(--blue-deep);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.1em;
}

.hero h1 {
  margin: 0;
  color: var(--navy);
  font-size: clamp(60px, 7vw, 88px);
  line-height: 0.95;
}

.hero h1 span {
  color: var(--blue);
}

.hero-title {
  margin: 18px 0 12px;
  color: var(--navy);
  font-size: clamp(25px, 2.6vw, 35px);
  font-weight: 800;
}

.hero-summary {
  max-width: 430px;
  margin: 0 0 28px;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.8;
}

.button {
  min-height: 54px;
  padding: 0 24px;
}

.button-main {
  color: var(--white);
  background: var(--blue);
  box-shadow: 5px 5px 0 var(--blue-deep);
}

.button-main:hover {
  background: var(--blue-deep);
}

.hero-meta {
  display: flex;
  margin: 33px 0 0;
  padding: 0;
  list-style: none;
  gap: 22px;
}

.hero-meta li {
  display: inline-flex;
  align-items: center;
  color: var(--muted);
  font-size: 12px;
  gap: 6px;
}

.hero-meta .icon {
  color: var(--blue);
  font-size: 18px;
}

.hero-visual {
  position: relative;
  height: 570px;
  margin-right: -24px;
}

.phone-frame {
  position: absolute;
  top: 12px;
  right: 0;
  width: 292px;
  padding: 7px;
  border: 7px solid #192638;
  border-radius: var(--radius);
  background: #192638;
  box-shadow: 0 20px 34px rgba(17, 39, 65, 0.2);
}

.phone-frame img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 1px;
}

.reading-card {
  position: absolute;
  right: 184px;
  bottom: 128px;
  width: 226px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--white);
  box-shadow: 0 15px 30px rgba(17, 39, 65, 0.12);
}

.reading-card-head,
.queue-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: var(--navy);
  font-size: 13px;
  font-weight: 800;
}

.reading-card strong,
.reading-card small {
  display: block;
}

.reading-card strong {
  margin-top: 17px;
  color: var(--navy);
  font-size: 15px;
}

.reading-card small {
  margin-top: 5px;
  color: var(--muted);
  font-size: 12px;
}

.progress {
  height: 5px;
  margin: 14px 0;
  overflow: hidden;
  border-radius: var(--radius);
  background: #e6eef5;
}

.progress span {
  display: block;
  width: 68%;
  height: 100%;
  background: var(--blue);
}

.reading-card a {
  display: flex;
  min-height: 36px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--blue-deep);
  font-size: 12px;
  font-weight: 800;
}

.shelf {
  border-top: 1px solid var(--line);
  background: var(--soft);
}

.section-heading h2 {
  max-width: 740px;
  margin: 0;
  color: var(--navy);
  font-size: clamp(32px, 3.7vw, 48px);
  line-height: 1.16;
}

.section-heading > span,
.split-heading > p {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.7;
}

.split-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 30px;
}

.split-heading > p {
  max-width: 330px;
  margin: 0;
}

.shelf-layout {
  display: grid;
  margin-top: 38px;
  grid-template-columns: 148px minmax(0, 1fr) 250px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.genre-rail {
  border-right: 1px solid var(--line);
}

.genre-rail ul {
  display: flex;
  margin: 0;
  padding: 16px 0;
  flex-direction: column;
  list-style: none;
}

.genre-rail a {
  display: block;
  padding: 11px 15px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
  line-height: 1.4;
}

.genre-rail li + li {
  margin-top: 6px;
}

.genre-rail .selected,
.genre-rail a:hover {
  border-left: 3px solid var(--blue);
  color: var(--blue-deep);
  background: var(--white);
}

.shelf-copy {
  padding: 34px 40px;
}

.number-label {
  color: var(--blue-deep);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.shelf-copy h3 {
  max-width: 500px;
  margin: 16px 0 12px;
  color: var(--navy);
  font-size: 27px;
  line-height: 1.28;
}

.shelf-copy > p {
  max-width: 540px;
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.8;
}

.topic-list {
  display: grid;
  margin-top: 27px;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}

.topic-list article {
  padding: 13px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--white);
}

.topic-list b,
.topic-list span {
  display: block;
}

.topic-list b {
  color: var(--navy);
  font-size: 13px;
}

.topic-list span {
  margin-top: 6px;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.55;
}

.queue-panel {
  padding: 25px 20px;
  border-left: 1px solid var(--line);
  background: var(--white);
}

.queue-panel ol,
.chapter-panel ol {
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
}

.queue-panel li {
  padding: 13px 0;
  border-top: 1px solid var(--line);
}

.queue-panel b,
.queue-panel span {
  display: block;
}

.queue-panel b {
  color: var(--navy);
  font-size: 13px;
}

.queue-panel span {
  margin-top: 5px;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.5;
}

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

.screen-gallery {
  display: grid;
  margin-top: 40px;
  grid-template-columns: repeat(4, minmax(0, 250px));
  justify-content: center;
  gap: 22px;
}

.screen-gallery figure {
  margin: 0;
}

.screen-gallery figure:nth-child(even) {
  margin-top: 30px;
}

.screen-gallery img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.screen-gallery figcaption {
  display: grid;
  padding: 13px 2px 0;
  grid-template-columns: auto 1fr;
  column-gap: 8px;
  row-gap: 4px;
}

.screen-gallery figcaption b {
  grid-row: span 2;
  color: var(--blue-deep);
  font-size: 12px;
}

.screen-gallery figcaption strong {
  color: var(--navy);
  font-size: 14px;
}

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

.reading {
  display: grid;
  padding: 105px 0;
  grid-template-columns: minmax(0, 0.8fr) 280px minmax(220px, 0.6fr);
  align-items: center;
  gap: clamp(28px, 5vw, 74px);
}

.reading-copy h2 {
  margin: 0 0 16px;
  color: var(--navy);
  font-size: clamp(31px, 3.2vw, 44px);
  line-height: 1.18;
}

.reading-copy > p:not(.eyebrow) {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.8;
}

.reading-tags {
  display: flex;
  margin: 24px 0 0;
  padding: 0;
  flex-wrap: wrap;
  list-style: none;
  gap: 8px;
}

.reading-tags li {
  padding: 8px 11px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--blue-deep);
  background: var(--soft);
  font-size: 12px;
  font-weight: 700;
}

.detail-screen {
  margin: 0;
}

.detail-screen img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.detail-screen figcaption {
  margin-top: 11px;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.6;
}

.chapter-panel {
  padding: 21px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--soft);
}

.chapter-panel li {
  padding: 13px 0;
  border-top: 1px solid var(--line);
}

.chapter-panel b,
.chapter-panel span {
  display: block;
}

.chapter-panel b {
  color: var(--navy);
  font-size: 14px;
}

.chapter-panel span {
  margin-top: 5px;
  color: var(--muted);
  font-size: 12px;
}

.faq {
  background: var(--soft);
}

.faq-list {
  display: grid;
  margin-top: 34px;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.faq-list article,
.official {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--white);
}

.faq-list button,
.official button {
  display: flex;
  width: 100%;
  min-height: 58px;
  padding: 13px 16px;
  align-items: center;
  border: 0;
  color: var(--navy);
  background: var(--white);
  font-size: 14px;
  font-weight: 700;
  text-align: left;
  cursor: pointer;
}

.faq-list button .icon,
.official button .icon:last-child {
  margin-left: auto;
  color: var(--blue);
}

.faq-list article > div {
  padding: 0 16px 16px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.75;
}

.official {
  margin-top: 14px;
}

.official button {
  gap: 10px;
}

.official > div {
  padding: 0 16px 16px 42px;
}

.official a {
  color: var(--blue-deep);
  font-size: 13px;
  font-weight: 700;
  text-decoration: underline;
}

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

.review-grid {
  display: grid;
  margin-top: 34px;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

.review-grid article {
  padding: 19px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--white);
}

.review-number {
  display: inline-flex;
  min-width: 32px;
  min-height: 24px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius);
  color: var(--blue-deep);
  background: #eaf5fe;
  font-size: 12px;
}

.review-grid p {
  margin: 16px 0;
  color: #4e5b6d;
  font-size: 13px;
  line-height: 1.82;
}

.review-grid footer {
  display: flex;
  padding-top: 12px;
  align-items: center;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 12px;
  gap: 8px;
}

.review-grid footer span {
  display: grid;
  width: 24px;
  height: 24px;
  place-items: center;
  border-radius: var(--radius);
  color: var(--white);
  background: var(--blue);
}

.review-grid footer time {
  margin-left: auto;
}

.download {
  display: flex;
  min-height: 156px;
  margin-top: 82px;
  padding: 30px 42px;
  align-items: center;
  justify-content: space-between;
  border-radius: var(--radius);
  color: var(--white);
  background: var(--blue);
}

.download .eyebrow {
  color: #dff2ff;
}

.download h2 {
  margin: 0;
  font-size: clamp(28px, 3vw, 39px);
}

.download a {
  display: inline-flex;
  min-width: 184px;
  min-height: 56px;
  padding: 0 21px;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: 1px solid var(--white);
  border-radius: var(--radius);
  color: var(--blue-deep);
  background: var(--white);
  font-size: 14px;
  font-weight: 800;
}

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

.site-footer {
  margin-top: 28px;
  border-top: 1px solid var(--line);
}

.footer-inner {
  display: grid;
  min-height: 94px;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 22px;
}

.footer-inner nav {
  display: flex;
  justify-content: center;
}

.footer-inner nav ul {
  display: flex;
  margin: 0;
  padding: 0;
  justify-content: center;
  list-style: none;
  gap: 20px;
}

.footer-inner nav a,
.footer-inner small {
  color: var(--muted);
  font-size: 12px;
}

.footer-inner nav a:hover {
  color: var(--blue-deep);
}

@media (max-width: 1040px) {
  .primary-nav {
    gap: 18px;
  }

  .shelf-layout {
    grid-template-columns: 126px minmax(0, 1fr) 220px;
  }

  .shelf-copy {
    padding: 30px;
  }

  .topic-list {
    grid-template-columns: 1fr;
  }

  .screen-gallery {
    grid-template-columns: repeat(4, minmax(0, 210px));
    gap: 16px;
  }

  .reading {
    grid-template-columns: minmax(0, 0.85fr) 240px minmax(190px, 0.55fr);
    gap: 27px;
  }
}

@media (max-width: 820px) {
  .primary-nav {
    display: none;
  }

  .nav-download {
    margin-left: auto;
  }

  .menu-toggle {
    display: grid;
    width: 40px;
    height: 40px;
    place-items: center;
    border: 1px solid var(--blue);
    border-radius: var(--radius);
    color: var(--blue-deep);
    background: var(--white);
    cursor: pointer;
  }

  .mobile-nav {
    position: absolute;
    z-index: 30;
    display: block;
    top: calc(100% + 8px);
    right: 24px;
    left: auto;
    width: min(250px, calc(100% - 48px));
    padding: 7px 12px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--white);
    box-shadow: 0 14px 28px rgba(17, 39, 65, 0.16);
  }

  .mobile-nav ul {
    display: grid;
    margin: 0;
    padding: 0;
    list-style: none;
  }

  .mobile-nav[hidden] {
    display: none;
  }

  .mobile-nav a {
    display: flex;
    min-height: 44px;
    padding: 0 7px;
    align-items: center;
    color: var(--navy);
    font-size: 14px;
    font-weight: 700;
  }

  .mobile-nav li + li {
    border-top: 1px solid var(--line);
  }

  .mobile-nav a:hover,
  .mobile-nav a:active {
    color: var(--blue-deep);
    background: #f3f9fe;
  }

  .hero {
    grid-template-columns: 0.85fr 1.15fr;
  }

  .phone-frame {
    width: 250px;
  }

  .reading-card {
    right: 96px;
    width: 205px;
  }

  .shelf-layout {
    grid-template-columns: 116px 1fr;
  }

  .queue-panel {
    grid-column: span 2;
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  .queue-panel ol {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 13px;
  }

  .queue-panel li {
    border-top: 0;
  }

  .screen-gallery {
    grid-template-columns: repeat(4, minmax(0, 175px));
    gap: 12px;
  }

  .reading {
    grid-template-columns: 1fr 240px;
  }

  .chapter-panel {
    grid-column: span 2;
  }

  .chapter-panel ol {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 13px;
  }

  .chapter-panel li {
    border-top: 0;
  }

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

@media (max-width: 640px) {
  body {
    padding-top: 64px;
  }

  .site-header {
    position: fixed;
    right: 0;
    left: 0;
    transform: translate3d(0, 0, 0);
  }

  .nav-shell {
    width: calc(100% - 32px);
    min-height: 64px;
    gap: 9px;
  }

  .brand {
    min-width: 0;
    font-size: 15px;
  }

  .brand img {
    width: 32px;
    height: 32px;
  }

  .nav-download {
    min-height: 35px;
    padding: 0 9px;
    font-size: 12px;
  }

  .nav-download .icon {
    display: none;
  }

  .menu-toggle {
    width: 35px;
    height: 35px;
  }

  .mobile-nav {
    top: 64px;
    right: 16px;
    left: auto;
    width: min(235px, calc(100% - 32px));
  }

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

  .section-wrap {
    padding: 65px 0;
  }

  .hero {
    display: block;
    min-height: 0;
  }

  .hero-copy {
    padding: 54px 0 25px;
    text-align: center;
  }

  .hero-summary {
    margin-right: auto;
    margin-left: auto;
  }

  .hero-copy .button {
    margin: auto;
  }

  .hero-meta {
    justify-content: center;
    gap: 12px;
  }

  .hero-visual {
    height: 460px;
    margin: 0 -16px;
  }

  .phone-frame {
    top: 8px;
    right: 50%;
    width: 228px;
    transform: translateX(50%);
  }

  .reading-card {
    display: none;
  }

  .split-heading {
    display: block;
  }

  .split-heading > p {
    margin-top: 13px;
  }

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

  .genre-rail {
    overflow-x: auto;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .genre-rail ul {
    padding: 9px 0;
    flex-direction: row;
    gap: 4px;
  }

  .genre-rail li + li {
    margin-top: 0;
  }

  .genre-rail a {
    white-space: nowrap;
  }

  .genre-rail .selected,
  .genre-rail a:hover {
    border-bottom: 3px solid var(--blue);
    border-left: 0;
  }

  .shelf-copy {
    padding: 28px 20px;
  }

  .shelf-copy h3 {
    font-size: 25px;
  }

  .topic-list {
    grid-template-columns: 1fr;
  }

  .queue-panel {
    grid-column: auto;
  }

  .queue-panel ol {
    display: block;
  }

  .queue-panel li {
    border-top: 1px solid var(--line);
  }

  .screen-gallery {
    display: flex;
    margin-right: -16px;
    overflow-x: auto;
    padding: 12px 16px 14px 0;
    justify-content: flex-start;
    gap: 16px;
  }

  .screen-gallery figure {
    flex: 0 0 195px;
  }

  .screen-gallery figure:nth-child(even) {
    margin-top: 0;
  }

  .reading {
    display: grid;
    padding: 65px 0;
    grid-template-columns: 1fr;
    gap: 29px;
  }

  .detail-screen {
    width: min(100%, 260px);
    margin: auto;
  }

  .chapter-panel {
    grid-column: auto;
  }

  .chapter-panel ol {
    display: block;
  }

  .chapter-panel li {
    border-top: 1px solid var(--line);
  }

  .faq-list,
  .review-grid {
    grid-template-columns: 1fr;
  }

  .download {
    display: block;
    min-height: 0;
    margin-top: 58px;
    padding: 29px 21px;
    text-align: center;
  }

  .download a {
    width: 100%;
    margin-top: 22px;
  }

  .footer-inner {
    padding: 24px 0;
    grid-template-columns: 1fr;
    justify-items: center;
    text-align: center;
  }

  .footer-inner nav ul {
    flex-wrap: wrap;
  }
}