@charset "UTF-8";

/* 作者：搭客佬
   链接：https://www.veneragw.cn/ */

:root {
  --brand: #2d50ee;
  --brand-dark: #1739c9;
  --mint: #b8f3de;
  --mint-strong: #79dfbd;
  --ink: #10213a;
  --text: #33465f;
  --muted: #6d7e92;
  --line: #d8e2eb;
  --paper: #ffffff;
  --wash: #f3f7fb;
  --navy: #0c1b32;
  --container: 1200px;
  --header-height: 76px;
}

* {
  box-sizing: border-box;
}

html {
  min-width: 320px;
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-height);
}

body {
  min-width: 320px;
  margin: 0;
  padding-top: var(--header-height);
  color: var(--ink);
  background: var(--paper);
  font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

body.menu-open {
  overflow: hidden;
}

button,
input {
  font: inherit;
}

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

button {
  color: inherit;
}

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

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

p,
h1,
h2,
h3,
figure,
dl,
dd {
  margin: 0;
}

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

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.site-header {
  position: fixed;
  z-index: 1000;
  top: 0;
  right: 0;
  left: 0;
  height: var(--header-height);
  background: #ffffff;
  border-bottom: 1px solid var(--line);
  transform: translate3d(0, 0, 0);
  backface-visibility: hidden;
}

.header-inner,
.section-inner,
.footer-inner,
.hero-inner {
  width: min(calc(100% - 40px), var(--container));
  margin: 0 auto;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.brand {
  display: inline-flex;
  min-width: 0;
  align-items: center;
  gap: 12px;
}

.brand img {
  width: 48px;
  height: 48px;
  flex: 0 0 48px;
  object-fit: contain;
}

.brand-copy {
  display: flex;
  min-width: 0;
  flex-direction: column;
  line-height: 1.25;
}

.brand-copy strong {
  font-size: 18px;
  white-space: nowrap;
}

.brand-copy span {
  margin-top: 4px;
  color: var(--muted);
  font-size: 12px;
  white-space: nowrap;
}

.main-nav ul {
  display: flex;
  align-items: stretch;
  gap: 34px;
}

.main-nav a {
  position: relative;
  display: flex;
  align-items: center;
  min-height: var(--header-height);
  font-size: 14px;
  font-weight: 700;
  white-space: nowrap;
}

.main-nav a::after {
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  height: 3px;
  content: "";
  background: var(--brand);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform 160ms ease;
}

.main-nav a:hover,
.main-nav a:focus-visible,
.main-nav a.is-current {
  color: var(--brand);
}

.main-nav a:hover::after,
.main-nav a:focus-visible::after,
.main-nav a.is-current::after {
  transform: scaleX(1);
}

.mobile-tools {
  display: none;
  align-items: center;
  gap: 10px;
}

.mobile-download {
  display: inline-flex;
  min-height: 40px;
  align-items: center;
  justify-content: center;
  padding: 0 16px;
  color: #ffffff;
  background: var(--brand);
  font-size: 13px;
  font-weight: 700;
  white-space: nowrap;
}

.menu-toggle {
  display: inline-flex;
  width: 42px;
  height: 42px;
  align-items: center;
  justify-content: center;
  padding: 0;
  background: #ffffff;
  border: 1px solid var(--ink);
  cursor: pointer;
}

.menu-toggle i {
  width: 22px;
  height: 22px;
}

[class^="i-"],
[class*=" i-"] {
  display: inline-block;
  flex: 0 0 auto;
  background-position: center;
  background-repeat: no-repeat;
  background-size: 100% 100%;
}

.i-menu { background-image: url("../icons/menu.svg"); }
.menu-toggle[aria-expanded="true"] .i-menu { background-image: url("../icons/close.svg"); }
.i-search { background-image: url("../icons/search.svg"); }
.i-folder { background-image: url("../icons/folder.svg"); }
.i-bell { background-image: url("../icons/bell.svg"); }
.i-database { background-image: url("../icons/database.svg"); }
.i-settings { background-image: url("../icons/settings.svg"); }
.i-arrow { background-image: url("../icons/arrow.svg"); }
.i-globe { background-image: url("../icons/globe.svg"); }
.i-avatar { background-image: url("../icons/avatar.svg"); }
.i-home { background-image: url("../icons/home.svg"); }
.i-grid { background-image: url("../icons/grid.svg"); }
.i-book { background-image: url("../icons/folder.svg"); }
.i-user { background-image: url("../icons/avatar.svg"); }
.i-top { background-image: url("../images/top.svg"); }

.hero {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
  background-color: #fbfdff;
  background-image: linear-gradient(rgba(45, 80, 238, 0.055) 1px, transparent 1px), linear-gradient(90deg, rgba(45, 80, 238, 0.055) 1px, transparent 1px);
  background-size: 64px 64px;
}

.hero-inner {
  display: grid;
  min-height: 690px;
  grid-template-columns: minmax(0, 1fr) 400px;
  align-items: center;
  gap: 72px;
}

.hero-copy {
  padding: 80px 0 70px;
}

.eyebrow {
  color: var(--brand);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.18em;
}

.hero h1 {
  margin-top: 18px;
  font-size: clamp(64px, 6.2vw, 96px);
  line-height: 1;
  letter-spacing: -0.055em;
  white-space: nowrap;
}

.hero-slogan {
  max-width: 720px;
  margin-top: 26px;
  font-size: 29px;
  font-weight: 800;
  line-height: 1.35;
}

.hero-summary {
  max-width: 660px;
  margin-top: 18px;
  color: var(--text);
  font-size: 16px;
}

.primary-action {
  display: inline-flex;
  min-width: 184px;
  min-height: 56px;
  align-items: center;
  justify-content: center;
  gap: 22px;
  margin-top: 34px;
  padding: 0 26px;
  color: #ffffff;
  background: var(--brand);
  border: 2px solid var(--brand);
  font-size: 16px;
  font-weight: 800;
}

.primary-action .i-arrow,
.download-action .i-arrow {
  width: 20px;
  height: 20px;
}

.primary-action:hover,
.primary-action:focus-visible {
  color: var(--brand);
  background: #ffffff;
}

.primary-action:hover .i-arrow,
.primary-action:focus-visible .i-arrow {
  filter: brightness(0) saturate(100%) invert(30%) sepia(88%) saturate(5230%) hue-rotate(230deg) brightness(94%) contrast(98%);
}

.age-label {
  display: block;
  margin-top: 12px;
  color: var(--muted);
  font-size: 12px;
}

.hero-points {
  display: flex;
  flex-wrap: wrap;
  gap: 26px;
  margin-top: 30px;
}

.hero-points span {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 700;
}

.hero-points i {
  width: 20px;
  height: 20px;
}

.hero-device {
  display: flex;
  align-self: stretch;
  align-items: center;
  justify-content: flex-end;
}

.phone-shell {
  width: 326px;
  padding: 13px;
  background: #0d121a;
  border: 1px solid #05070b;
  border-radius: 44px;
  box-shadow: 24px 28px 0 rgba(35, 55, 87, 0.12);
}

.phone-screen {
  position: relative;
  overflow: hidden;
  min-height: 606px;
  padding: 16px 15px 62px;
  background: #ffffff;
  border-radius: 32px;
}

.phone-screen::before {
  position: absolute;
  top: 7px;
  left: 50%;
  width: 82px;
  height: 22px;
  content: "";
  background: #0d121a;
  border-radius: 999px;
  transform: translateX(-50%);
}

.phone-status {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 3px 4px 16px;
  font-size: 12px;
  font-weight: 800;
}

.phone-signals {
  letter-spacing: 0.08em;
}

.phone-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 10px;
  font-size: 23px;
}

.phone-head i {
  width: 22px;
  height: 22px;
}

.phone-search {
  display: flex;
  height: 42px;
  align-items: center;
  gap: 8px;
  margin-top: 15px;
  padding: 0 14px;
  background: #eff3f7;
  border-radius: 999px;
}

.phone-search i {
  width: 18px;
  height: 18px;
}

.phone-search input {
  width: 100%;
  min-width: 0;
  color: var(--ink);
  background: transparent;
  border: 0;
  outline: 0;
  font-size: 12px;
}

.phone-tabs {
  display: grid;
  margin-top: 13px;
  border-bottom: 1px solid var(--line);
  grid-template-columns: repeat(3, 1fr);
}

.phone-tabs button {
  position: relative;
  padding: 8px 4px 10px;
  background: transparent;
  border: 0;
  cursor: pointer;
  font-size: 12px;
}

.phone-tabs button::after {
  position: absolute;
  bottom: -1px;
  left: 22%;
  width: 56%;
  height: 2px;
  content: "";
  background: transparent;
}

.phone-tabs button.is-active {
  color: var(--brand);
  font-weight: 800;
}

.phone-tabs button.is-active::after {
  background: var(--brand);
}

.phone-featured {
  display: grid;
  overflow: hidden;
  height: 128px;
  margin-top: 13px;
  color: #ffffff;
  background: var(--navy);
  border-radius: 12px;
  grid-template-columns: 1fr 98px;
}

.phone-featured > div {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 14px 8px 14px 16px;
}

.phone-featured span,
.phone-featured small,
.phone-books small {
  font-size: 12px;
}

.phone-featured strong {
  margin: 5px 0;
  font-size: 16px;
  line-height: 1.35;
}

.phone-featured img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  background: #dfe7f2;
}

.phone-list-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 14px;
}

.phone-list-head strong {
  font-size: 14px;
}

.phone-list-head button {
  padding: 3px 0;
  color: var(--brand);
  background: transparent;
  border: 0;
  cursor: pointer;
  font-size: 12px;
}

.phone-books {
  display: grid;
  gap: 8px;
  margin-top: 9px;
  grid-template-columns: repeat(3, 1fr);
}

.phone-books article {
  min-width: 0;
}

.phone-cover {
  display: flex;
  width: 100%;
  height: 105px;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: #edf2f7;
  border-radius: 8px;
}

.phone-cover img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.phone-books strong,
.phone-books small {
  display: block;
  overflow: hidden;
  margin-top: 4px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.phone-books strong {
  font-size: 12px;
}

.phone-books small {
  color: var(--muted);
}

.phone-nav {
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  display: grid;
  height: 60px;
  padding: 6px 10px 4px;
  background: #ffffff;
  border-top: 1px solid var(--line);
  grid-template-columns: repeat(4, 1fr);
}

.phone-nav span {
  display: flex;
  align-items: center;
  flex-direction: column;
  justify-content: center;
  gap: 2px;
  color: var(--muted);
  font-size: 12px;
}

.phone-nav i {
  width: 18px;
  height: 18px;
}

.phone-nav span.is-active {
  color: var(--brand);
  font-weight: 800;
}

section:not(.hero) {
  padding: 104px 0;
}

.section-heading {
  display: grid;
  align-items: end;
  margin-bottom: 44px;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 460px);
  column-gap: 50px;
}

.section-heading .eyebrow {
  grid-column: 1;
}

.section-heading h2 {
  margin-top: 9px;
  font-size: 46px;
  line-height: 1.18;
  letter-spacing: -0.04em;
}

.section-heading > p:last-child {
  grid-row: 1 / span 2;
  grid-column: 2;
  color: var(--text);
  font-size: 15px;
}

.source-section {
  background: #ffffff;
}

.source-layout {
  display: grid;
  min-height: 420px;
  grid-template-columns: minmax(0, 1fr) 330px;
  border-top: 1px solid var(--ink);
  border-bottom: 1px solid var(--ink);
}

.source-route {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}

.route-step {
  position: relative;
  display: flex;
  min-width: 0;
  align-items: flex-start;
  flex-direction: column;
  padding: 34px 24px;
  text-align: left;
  background: #ffffff;
  border: 0;
  border-right: 1px solid var(--line);
  cursor: pointer;
}

.route-step::after {
  position: absolute;
  right: 22px;
  bottom: 24px;
  left: 22px;
  height: 4px;
  content: "";
  background: var(--brand);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 160ms ease;
}

.route-step.is-active {
  background: var(--wash);
}

.route-step.is-active::after {
  transform: scaleX(1);
}

.route-number {
  color: var(--brand);
  font-size: 12px;
  font-weight: 800;
}

.route-step > i {
  width: 42px;
  height: 42px;
  margin-top: 76px;
}

.route-step strong {
  margin-top: 22px;
  font-size: 18px;
}

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

.source-console {
  padding: 30px;
  color: #ffffff;
  background: var(--navy);
}

.console-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 15px;
}

.console-head > div {
  display: flex;
  flex-direction: column;
}

.console-head span,
.source-console button,
.source-console dt,
.source-console dd {
  font-size: 12px;
}

.console-head > div span {
  color: var(--mint);
  font-weight: 800;
  letter-spacing: 0.12em;
}

.console-head strong {
  margin-top: 4px;
  font-size: 24px;
}

.status-dot {
  padding: 5px 9px;
  color: #052f22;
  background: var(--mint);
  border-radius: 999px;
  white-space: nowrap;
}

.console-search {
  display: flex;
  min-height: 58px;
  align-items: center;
  gap: 12px;
  margin-top: 26px;
  padding: 12px 14px;
  color: #dfe7f4;
  border: 1px solid #40516a;
  font-size: 12px;
}

.console-search i {
  width: 20px;
  height: 20px;
  filter: brightness(0) invert(1);
}

.console-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 18px;
}

.console-chips button {
  padding: 8px 11px;
  color: #ffffff;
  background: transparent;
  border: 1px solid #40516a;
  cursor: pointer;
}

.console-chips button.is-active {
  color: #052f22;
  background: var(--mint);
  border-color: var(--mint);
}

.console-details {
  margin-top: 26px;
  border-top: 1px solid #40516a;
}

.console-details div {
  display: flex;
  justify-content: space-between;
  padding: 12px 0;
  border-bottom: 1px solid #40516a;
}

.console-details dt {
  color: #9fb0c6;
}

.catalog-section {
  background: #f5f8ff;
}

.catalog-board {
  display: grid;
  min-height: 320px;
  grid-template-columns: 70px minmax(0, 1fr) 270px;
  background: #ffffff;
  border: 1px solid var(--line);
}

.alphabet {
  display: grid;
  align-content: stretch;
  border-right: 1px solid var(--line);
}

.alphabet button,
.genre-grid button {
  background: #ffffff;
  border: 0;
  cursor: pointer;
  font-size: 12px;
}

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

.alphabet button:last-child {
  border-bottom: 0;
}

.alphabet button.is-active {
  color: #ffffff;
  background: var(--brand);
}

.genre-grid {
  display: grid;
  align-content: center;
  gap: 12px;
  padding: 36px;
  grid-template-columns: repeat(5, minmax(0, 1fr));
}

.genre-grid button {
  min-height: 48px;
  padding: 8px;
  color: #0d4939;
  background: #d9f7eb;
  border: 1px solid transparent;
  border-radius: 6px;
}

.genre-grid button:hover,
.genre-grid button:focus-visible,
.genre-grid button.is-active {
  color: #ffffff;
  background: var(--brand);
}

.catalog-note {
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 34px;
  color: #ffffff;
  background: var(--navy);
}

.catalog-note span {
  color: var(--mint);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.14em;
}

.catalog-note strong {
  margin-top: 16px;
  font-size: 24px;
  line-height: 1.55;
}

.screens-section {
  background: #ffffff;
}

.screen-grid {
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.screen-card {
  min-width: 0;
  overflow: hidden;
  background: #ffffff;
  border: 1px solid var(--ink);
}

.screen-media {
  display: flex;
  width: 100%;
  aspect-ratio: 9 / 20;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: #f7fafc;
  border-bottom: 1px solid var(--ink);
}

.screen-media img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.screen-card figcaption {
  display: flex;
  min-height: 72px;
  align-items: center;
  gap: 16px;
  padding: 16px 18px;
}

.screen-card figcaption span {
  color: var(--brand);
  font-size: 12px;
  font-weight: 800;
}

.screen-card figcaption strong {
  font-size: 16px;
}

.faq-section {
  background: #f5f8ff;
}

.faq-list {
  border-top: 1px solid var(--ink);
}

.faq-item {
  background: #ffffff;
  border-bottom: 1px solid var(--line);
}

.faq-item > button {
  display: flex;
  width: 100%;
  min-height: 72px;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 16px 24px;
  text-align: left;
  background: #ffffff;
  border: 0;
  cursor: pointer;
  font-size: 16px;
  font-weight: 700;
}

.faq-item > button span {
  display: flex;
  align-items: center;
  gap: 22px;
}

.faq-item > button b {
  color: var(--brand);
  font-size: 12px;
}

.faq-item > button > i,
.details-state {
  position: relative;
  width: 18px;
  height: 18px;
}

.faq-item > button > i::before,
.faq-item > button > i::after,
.details-state::before,
.details-state::after {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 14px;
  height: 1px;
  content: "";
  background: var(--ink);
  transform: translate(-50%, -50%);
}

.faq-item > button > i::after,
.details-state::after {
  transform: translate(-50%, -50%) rotate(90deg);
}

.faq-item > button[aria-expanded="true"] > i::after,
.official-site[open] .details-state::after {
  transform: translate(-50%, -50%) rotate(0deg);
}

.faq-item > button:hover,
.faq-item > button:focus-visible {
  color: var(--brand);
  background: #f9fbff;
}

.faq-answer {
  padding: 0 24px 24px 70px;
  color: var(--text);
}

.faq-answer p {
  max-width: 920px;
  font-size: 14px;
}

.official-site {
  width: 100%;
  margin-top: 24px;
  background: #ffffff;
  border: 1px solid var(--ink);
}

.official-site summary {
  display: flex;
  min-height: 72px;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 16px 24px;
  cursor: pointer;
  list-style: none;
  font-size: 16px;
  font-weight: 800;
}

.official-site summary::-webkit-details-marker {
  display: none;
}

.official-site summary > span {
  display: inline-flex;
  align-items: center;
  gap: 14px;
}

.official-site .i-globe {
  width: 22px;
  height: 22px;
}

.official-answer {
  padding: 0 24px 24px 60px;
}

.official-answer a {
  display: inline-block;
  color: var(--brand);
  font-size: 14px;
  text-decoration: underline;
  text-underline-offset: 4px;
}

.reviews-section {
  background: #ffffff;
}

.review-grid {
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.review-card {
  display: flex;
  min-height: 252px;
  flex-direction: column;
  padding: 24px;
  background: #ffffff;
  border: 1px solid var(--line);
  border-top: 3px solid var(--brand);
}

.review-card:nth-child(2n) {
  border-top-color: var(--mint-strong);
}

.review-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

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

.review-user .i-avatar {
  width: 38px;
  height: 38px;
  padding: 8px;
  background-color: #eef2ff;
  background-size: 22px 22px;
  border-radius: 50%;
}

.review-user strong {
  overflow: hidden;
  font-size: 14px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.review-rating {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  gap: 2px;
  color: #ffb000;
  font-size: 14px;
  white-space: nowrap;
}

.review-rating .fa {
  display: inline-block;
  width: 14px;
  height: 18px;
  font-style: normal;
  line-height: 18px;
  text-align: center;
}

.review-rating .fa-star::before {
  content: "★";
}

.review-rating .fa-star-o::before {
  content: "☆";
}

.review-card > p {
  margin-top: 22px;
  color: var(--text);
  font-size: 14px;
  line-height: 1.9;
}

.review-card time {
  align-self: flex-end;
  margin-top: auto;
  padding-top: 20px;
  color: var(--muted);
  font-size: 12px;
  text-align: right;
}

.download-section {
  padding: 74px 0;
  color: #ffffff;
  background: var(--navy);
}

.download-dock {
  display: grid;
  min-height: 176px;
  align-items: stretch;
  overflow: hidden;
  background: #ffffff;
  grid-template-columns: 170px minmax(0, 1fr) 230px;
}

.download-index {
  display: flex;
  align-items: center;
  flex-direction: column;
  justify-content: center;
  color: var(--navy);
  background: var(--mint);
}

.download-index span {
  font-size: 54px;
  font-weight: 900;
  line-height: 1;
}

.download-index strong {
  margin-top: 8px;
  font-size: 12px;
  letter-spacing: 0.14em;
}

.download-copy {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 28px 42px;
  color: var(--ink);
}

.download-copy p {
  color: var(--brand);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.16em;
}

.download-copy h2 {
  margin-top: 7px;
  font-size: 28px;
  line-height: 1.35;
}

.download-copy > span {
  margin-top: 8px;
  color: var(--text);
  font-size: 13px;
}

.download-action {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  padding: 24px;
  color: #ffffff;
  background: var(--brand);
  font-size: 18px;
  font-weight: 800;
  white-space: nowrap;
}

.download-action:hover,
.download-action:focus-visible {
  background: var(--brand-dark);
}

.site-footer {
  color: #ffffff;
  background: #081426;
}

.footer-inner {
  padding: 42px 0 28px;
}

.footer-main {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 36px;
}

.footer-brand .brand-copy span {
  color: #aab7c8;
}

.footer-nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: 30px;
}

.footer-nav a {
  font-size: 13px;
}

.footer-nav a:hover,
.footer-nav a:focus-visible {
  color: var(--mint);
}

.copyright {
  margin-top: 30px;
  padding-top: 22px;
  color: #aab7c8;
  border-top: 1px solid rgba(255, 255, 255, 0.35);
  font-size: 12px;
  text-align: center;
}

.back-to-top {
  position: fixed;
  z-index: 900;
  right: 24px;
  bottom: 24px;
  display: flex;
  width: 52px;
  height: 52px;
  align-items: center;
  justify-content: center;
  padding: 0;
  visibility: hidden;
  opacity: 0;
  background: var(--brand);
  border: 2px solid #ffffff;
  cursor: pointer;
  transition: opacity 120ms ease, visibility 120ms ease;
}

.back-to-top.is-visible {
  visibility: visible;
  opacity: 1;
}

.back-to-top i {
  width: 22px;
  height: 22px;
}

button:focus-visible,
a:focus-visible,
summary:focus-visible,
input:focus-visible {
  outline: 3px solid var(--mint-strong);
  outline-offset: 3px;
}

@media (max-width: 1080px) {
  .hero-inner {
    grid-template-columns: minmax(0, 1fr) 350px;
    gap: 34px;
  }

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

  .source-console {
    min-height: 320px;
  }

  .catalog-board {
    grid-template-columns: 64px minmax(0, 1fr);
  }

  .catalog-note {
    grid-column: 1 / -1;
    min-height: 160px;
  }
}

@media (max-width: 900px) {
  :root {
    --header-height: 68px;
  }

  .header-inner,
  .section-inner,
  .footer-inner,
  .hero-inner {
    width: min(calc(100% - 28px), var(--container));
  }

  .main-nav {
    position: fixed;
    z-index: 999;
    top: var(--header-height);
    right: 0;
    left: 0;
    display: none;
    padding: 8px 14px 18px;
    background: #ffffff;
    border-bottom: 1px solid var(--line);
  }

  .main-nav.is-open {
    display: block;
  }

  .main-nav ul {
    width: min(100%, var(--container));
    margin: 0 auto;
    flex-direction: column;
    gap: 0;
  }

  .main-nav a {
    min-height: 52px;
    border-bottom: 1px solid var(--line);
  }

  .main-nav a::after {
    display: none;
  }

  .mobile-tools {
    display: flex;
  }

  .brand img {
    width: 42px;
    height: 42px;
    flex-basis: 42px;
  }

  .brand-copy strong {
    font-size: 16px;
  }

  .hero-inner {
    min-height: auto;
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .hero-copy {
    padding: 70px 0 20px;
    text-align: center;
  }

  .hero h1 {
    font-size: clamp(52px, 14vw, 78px);
    white-space: normal;
  }

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

  .hero-points {
    justify-content: center;
  }

  .hero-device {
    justify-content: center;
    padding-bottom: 68px;
  }

  .section-heading {
    display: block;
  }

  .section-heading h2 {
    font-size: 40px;
  }

  .section-heading > p:last-child {
    max-width: 680px;
    margin-top: 12px;
  }

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

  .route-step {
    min-height: 250px;
    border-bottom: 1px solid var(--line);
  }

  .route-step > i {
    margin-top: 44px;
  }

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

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

  .download-dock {
    grid-template-columns: 140px minmax(0, 1fr);
  }

  .download-action {
    min-height: 76px;
    grid-column: 1 / -1;
  }
}

@media (max-width: 640px) {
  section:not(.hero) {
    padding: 76px 0;
  }

  .brand {
    gap: 8px;
  }

  .brand img {
    width: 38px;
    height: 38px;
    flex-basis: 38px;
  }

  .brand-copy strong {
    font-size: 14px;
  }

  .brand-copy span {
    max-width: none;
    overflow: visible;
    font-size: 12px;
    text-overflow: clip;
  }

  .mobile-download {
    min-height: 38px;
    padding: 0 12px;
    font-size: 12px;
  }

  .menu-toggle {
    width: 40px;
    height: 40px;
  }

  .hero-copy {
    padding-top: 56px;
  }

  .hero-slogan {
    font-size: 23px;
  }

  .hero-summary {
    font-size: 14px;
  }

  .hero-points {
    gap: 12px 18px;
  }

  .phone-shell {
    width: min(320px, calc(100vw - 42px));
    border-radius: 38px;
    box-shadow: 14px 18px 0 rgba(35, 55, 87, 0.11);
  }

  .phone-screen {
    min-height: 586px;
    border-radius: 28px;
  }

  .section-heading {
    margin-bottom: 30px;
  }

  .section-heading h2 {
    font-size: 34px;
  }

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

  .route-step {
    min-height: 190px;
    border-right: 0;
  }

  .route-step > i {
    margin-top: 22px;
  }

  .source-console {
    padding: 24px 20px;
  }

  .catalog-board {
    grid-template-columns: 48px minmax(0, 1fr);
  }

  .genre-grid {
    gap: 8px;
    padding: 18px 12px;
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .genre-grid button {
    min-height: 42px;
  }

  .catalog-note {
    min-height: 140px;
    padding: 24px;
  }

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

  .screen-card figcaption {
    min-height: 62px;
    gap: 9px;
    padding: 12px 10px;
  }

  .screen-card figcaption strong {
    font-size: 13px;
  }

  .faq-item > button,
  .official-site summary {
    min-height: 64px;
    padding: 14px 16px;
    font-size: 14px;
  }

  .faq-item > button span {
    gap: 12px;
  }

  .faq-answer {
    padding: 0 16px 20px 46px;
  }

  .official-answer {
    padding: 0 16px 20px 52px;
  }

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

  .review-card {
    min-height: 230px;
    padding: 20px;
  }

  .review-head {
    align-items: flex-start;
  }

  .download-section {
    padding: 58px 0;
  }

  .download-dock {
    grid-template-columns: 1fr;
  }

  .download-index {
    min-height: 100px;
    flex-direction: row;
    gap: 14px;
  }

  .download-index span {
    font-size: 42px;
  }

  .download-copy {
    padding: 28px 22px;
    text-align: center;
  }

  .download-copy h2 {
    font-size: 24px;
  }

  .download-action {
    min-height: 68px;
  }

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

  .footer-nav ul {
    justify-content: center;
    gap: 14px 22px;
  }

  .back-to-top {
    right: 14px;
    bottom: 14px;
    width: 48px;
    height: 48px;
    transition: none;
  }

  .main-nav a,
  .mobile-download,
  .menu-toggle,
  .primary-action,
  .route-step,
  .console-chips button,
  .alphabet button,
  .genre-grid button,
  .faq-item > button,
  .official-site summary,
  .download-action {
    transition: none;
    animation: none;
  }
}

@media (max-width: 390px) {
  .header-inner {
    width: calc(100% - 20px);
  }

  .brand-copy strong {
    font-size: 13px;
  }

  .mobile-tools {
    gap: 6px;
  }

  .mobile-download {
    padding: 0 10px;
  }
}