:root {
  color-scheme: dark;
  --base: #080b09;
  --card: #141b16;
  --soft-card: #1d2820;
  --ink: #f3f7ef;
  --quiet: #a7b4a9;
  --acid: #c5f85c;
  --leaf-paper: #dcf4c2;
  --dark-ink: #172211;
  --edge: #2a352c;
  --page: 1160px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 24px; }
body {
  margin: 0;
  background: var(--base);
  color: var(--ink);
  font-family: Inter, "Microsoft YaHei", "PingFang SC", sans-serif;
  line-height: 1.8;
  overflow-wrap: anywhere;
}
a { color: inherit; text-decoration: none; }
a:focus-visible, input:focus-visible + label { outline: 3px solid var(--acid); outline-offset: 5px; }
img, video { max-width: 100%; display: block; }
h2, h3, p, ul, dl, dd { margin: 0; }
ul { padding: 0; list-style: none; }
h2, h3 { line-height: 1.35; font-weight: 650; }
h2 { font-size: clamp(28px, 3.4vw, 42px); letter-spacing: -.045em; }
h3 { font-size: 23px; letter-spacing: -.025em; }
p, dd { color: var(--quiet); font-size: 15px; }
.page-width { width: min(var(--page), calc(100% - 48px)); margin-inline: auto; }
.skip-reading { position: absolute; left: 20px; top: -90px; padding: 12px 20px; background: var(--acid); color: var(--dark-ink); z-index: 10; }
.skip-reading:focus { top: 10px; }
.site-mast { border-bottom: 1px solid var(--edge); }
.mast-row { display: flex; align-items: center; min-height: 94px; gap: 40px; }
.brand-mark { width: 106px; flex: 0 0 auto; }
.brand-mark img, .footer-mark img { width: 100%; height: auto; }
.mast-row nav { margin-left: auto; }
.menu-items { display: flex; align-items: center; gap: 28px; font-size: 14px; }
.menu-items a { display: flex; align-items: center; min-height: 44px; }
.menu-items a:hover { color: var(--acid); }
.menu-items .device-link { border: 1px solid var(--edge); border-radius: 24px; padding: 5px 18px; gap: 22px; }
.menu-check, .menu-trigger { display: none; }
.introduction { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(0, .8fr); gap: 10%; align-items: center; padding-block: 68px 88px; }
.intro-prose { padding-bottom: 16px; }
.intro-keyword { display: block; font-size: clamp(34px, 3.7vw, 48px); color: var(--acid); }
.intro-strap { display: block; margin-top: 22px; max-width: 17em; font-size: clamp(24px, 2.7vw, 32px); line-height: 1.6; text-wrap: balance; }
.intro-description { margin-top: 30px; max-width: 34em; line-height: 2; }
.entry-links { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 32px; }
.entry-links a { min-height: 54px; padding: 12px 24px; display: inline-flex; align-items: center; justify-content: space-between; gap: 38px; border-radius: 6px; font-size: 15px; }
.registration-link { background: var(--acid); color: var(--dark-ink); font-weight: 650; }
.android-link { border: 1px solid #64725e; }
.entry-links a:hover { transform: translateY(-2px); }
.intro-film { width: min(100%, 274px); height: auto; aspect-ratio: 480 / 1000; object-fit: contain; justify-self: center; }
.preference-studio { padding-bottom: 104px; }
.feature-heading { display: grid; grid-template-columns: 1fr 1fr; align-items: end; gap: 12%; margin-bottom: 34px; }
.feature-heading p { max-width: 33em; }
.preference-layout { display: grid; grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr); gap: 20px; align-items: start; }
.appearance-sheet { background: var(--leaf-paper); color: var(--dark-ink); border-radius: 26px; padding: 38px; }
.appearance-sheet p { color: #425339; margin-top: 17px; }
.appearance-examples { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 30px; }
.appearance-examples > div { padding: 20px; border-radius: 12px; min-height: 152px; }
.sample-day { background: #f7faef; color: #24321b; transform: rotate(-3deg); }
.sample-night { background: #17241c; color: #f4f7ee; transform: rotate(3deg); }
.appearance-examples span { font-size: 16px; font-weight: 650; }
.appearance-examples i { display: block; width: 90%; height: 6px; margin-top: 14px; border-radius: 6px; background: currentColor; opacity: .13; }
.appearance-examples i:last-child { width: 55%; }
.system-caption { margin-top: 28px; display: flex; align-items: center; gap: 10px; font-size: 13px; }
.system-symbol { width: 19px; height: 19px; border: 1px solid #54694b; border-radius: 50%; background: linear-gradient(90deg, #263b25 50%, transparent 50%); flex: 0 0 auto; }
.language-sheet { margin-top: 66px; background: var(--card); border: 1px solid var(--edge); border-radius: 26px; padding: 36px; }
.language-sheet > p { margin-top: 17px; }
.language-map { margin-top: 28px; }
.language-map > div { display: flex; justify-content: space-between; gap: 20px; padding-block: 17px; border-top: 1px solid var(--edge); }
.language-map dt { color: var(--ink); font-size: 14px; }
.language-map dd { font-size: 13px; text-align: right; }
.reading-spread { padding-block: 76px; background: var(--card); }
.reading-layout { display: grid; grid-template-columns: minmax(0, .7fr) minmax(0, 1.05fr) minmax(0, .85fr); gap: 40px; align-items: start; }
.reading-heading p { margin-top: 24px; }
.content-window { padding: 20px 0 0; }
.reading-paper { padding: 25px; border: 1px solid #65705f; border-radius: 5px 24px 5px 5px; margin-bottom: 28px; background: var(--base); }
.reading-paper > span { display: inline-block; color: var(--acid); font-size: 18px; border-bottom: 2px solid var(--acid); padding-bottom: 4px; }
.reading-paper > div { margin-top: 18px; display: flex; gap: 20px; font-size: 12px; color: var(--quiet); }
.reading-paper strong { font-weight: 400; }
.reading-paper > p { font-size: 13px; margin-top: 24px; padding-top: 18px; border-top: 1px solid var(--edge); }
.content-window h3, .message-window h3 { font-size: 20px; margin-bottom: 13px; }
.message-window { margin-top: 102px; padding-left: 28px; border-left: 1px solid #465442; }
.message-symbol { width: 65px; height: 48px; border: 1px solid var(--acid); border-radius: 13px 13px 13px 0; margin-bottom: 25px; padding: 13px; }
.message-symbol span { display: block; height: 2px; background: var(--acid); margin-bottom: 9px; }
.message-symbol span:last-child { width: 62%; }
.reading-clues { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 22px; }
.reading-clues li { font-size: 12px; border-bottom: 1px solid #68705e; padding: 3px 10px; color: #d6e4ce; }
.notification-essay { display: grid; grid-template-columns: 1fr 1.3fr; gap: 10%; padding-block: 108px; }
.notification-essay header p { margin-top: 25px; }
.notification-bridge { align-self: center; }
.permission-pair { display: grid; grid-template-columns: 1fr 1fr; position: relative; gap: 30px; }
.permission-pair::before { content: ""; position: absolute; height: 1px; width: 60%; top: 36px; left: 20%; background: #5c7951; }
.permission-pair > div { position: relative; border-radius: 16px; padding: 25px 20px; border: 1px solid #45583a; background: var(--base); }
.permission-pair dt { color: var(--acid); font-size: 18px; font-weight: 650; }
.permission-pair dd { font-size: 13px; margin-top: 8px; }
.notification-bridge > p { margin-top: 24px; }
.answer-section { padding-block: 70px; background: #101710; border-top: 1px solid var(--edge); border-bottom: 1px solid var(--edge); }
.answers-heading { display: flex; align-items: start; justify-content: space-between; gap: 70px; margin-bottom: 45px; }
.answers-heading h2 { flex: 0 0 auto; }
.answers-heading p { max-width: 38em; }
.answer-pairs { display: grid; grid-template-columns: 1fr 1fr; gap: 38px 66px; }
.answer-pairs > div { border-top: 1px solid #3a4837; padding-top: 24px; }
.answer-pairs dt { color: var(--ink); font-size: 18px; font-weight: 600; line-height: 1.6; }
.answer-pairs dd { margin-top: 14px; }
.briefing { padding-block: 82px 95px; }
.briefing h2 { margin-bottom: 30px; }
.briefing-stories { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 24px; }
.briefing-stories > article { border-bottom: 1px solid #45513e; padding-bottom: 25px; }
.briefing-image { aspect-ratio: 16 / 9; overflow: hidden; border-radius: 10px; background: var(--card); }
.briefing-image img { width: 100%; height: 100%; object-fit: cover; aspect-ratio: 16 / 9; transition: transform .25s ease; }
.briefing-stories article:hover img { transform: scale(1.025); }
.briefing-stories h3 { font-size: 19px; line-height: 1.65; margin-top: 21px; font-weight: 550; }
.closing-line { padding-block: 48px 56px; border-top: 1px solid var(--edge); }
.closing-layout { display: block; }
.footer-mark { width: 82px; min-height: 44px; display: inline-flex; align-items: center; margin-bottom: 32px; }
.footer-directory { display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); gap: 30px; }
.footer-column { min-width: 0; }
.footer-column h3 { font-size: 15px; font-weight: 600; letter-spacing: 0; line-height: 1.6; margin-bottom: 16px; }
.footer-column a { display: block; min-height: 36px; padding-block: 6px; color: var(--quiet); font-size: 13px; line-height: 1.8; }
.footer-column a:hover { color: var(--acid); }
@media (max-width: 1000px) {
  .footer-directory { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 36px; }
  .menu-items { gap: 18px; }
  .reading-layout { gap: 28px; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
  .reading-heading { grid-column: 1 / -1; display: grid; grid-template-columns: 1fr 1fr; gap: 50px; align-items: center; }
  .reading-heading p { margin-top: 0; }
  .message-window { margin-top: 40px; }
  .introduction { gap: 6%; }
  .appearance-sheet, .language-sheet { padding: 28px; }
}
@media (max-width: 760px) {
  .page-width { width: calc(100% - 40px); }
  .mast-row { min-height: 70px; flex-wrap: wrap; gap: 0; position: relative; padding-block: 18px; }
  .brand-mark { width: 90px; }
  .menu-check { display: block; position: absolute; opacity: 0; width: 44px; height: 44px; right: 0; top: 12px; z-index: 2; margin: 0; cursor: pointer; }
  .menu-trigger { display: flex; margin-left: auto; width: 44px; height: 36px; align-items: center; justify-content: center; }
  .menu-trigger span, .menu-trigger span::before, .menu-trigger span::after { display: block; position: relative; width: 23px; height: 1px; background: var(--ink); transition: transform .18s ease; }
  .menu-trigger span::before, .menu-trigger span::after { content: ""; position: absolute; left: 0; top: -7px; }
  .menu-trigger span::after { top: 7px; }
  .menu-check:checked + .menu-trigger span { background: transparent; }
  .menu-check:checked + .menu-trigger span::before { transform: translateY(7px) rotate(45deg); }
  .menu-check:checked + .menu-trigger span::after { transform: translateY(-7px) rotate(-45deg); }
  .mast-row nav { display: none; width: 100%; margin: 16px 0 0; }
  .menu-check:checked ~ nav { display: block; }
  .menu-items { display: grid; grid-template-columns: 1fr 1fr; gap: 8px 25px; }
  .menu-items li:last-child { grid-column: 1 / -1; }
  .menu-items .device-link { justify-content: space-between; padding-inline: 0; border: 0; color: var(--acid); }
  .introduction { grid-template-columns: 1fr; gap: 36px; padding-block: 48px 70px; }
  .intro-keyword { font-size: clamp(29px, 6.8vw, 40px); }
  .intro-strap { font-size: 24px; margin-top: 18px; max-width: 18em; }
  .intro-description { margin-top: 22px; }
  .intro-film { width: min(66%, 250px); }
  .intro-prose { padding: 0; }
  .feature-heading { grid-template-columns: 1fr; gap: 23px; }
  .feature-heading br, .reading-heading br { display: none; }
  .preference-layout { grid-template-columns: 1fr; gap: 18px; }
  .language-sheet { margin-top: 0; }
  .preference-studio { padding-bottom: 66px; }
  .reading-spread { padding-block: 56px; }
  .reading-heading { grid-template-columns: 1fr; gap: 20px; }
  .reading-layout { grid-template-columns: 1fr; gap: 30px; }
  .content-window { padding-top: 0; }
  .reading-paper { max-width: 460px; }
  .message-window { margin: 5px 0 0; padding: 24px; border: 1px solid #45513f; border-radius: 18px; }
  .notification-essay { grid-template-columns: 1fr; gap: 30px; padding-block: 66px; }
  .notification-essay header br { display: none; }
  .permission-pair { gap: 16px; }
  .permission-pair > div { padding: 22px 18px; }
  .permission-pair dt { font-size: 16px; }
  .answer-section { padding-block: 52px; }
  .answers-heading { display: block; margin-bottom: 30px; }
  .answers-heading p { margin-top: 20px; }
  .answer-pairs { grid-template-columns: 1fr; gap: 26px; }
  .answer-pairs > div { padding-top: 22px; }
  .briefing { padding-block: 60px; }
  .briefing-stories { grid-template-columns: 1fr; gap: 32px; }
  .briefing-stories h3 { font-size: 20px; margin-top: 16px; }
  .closing-line { padding-block: 34px 42px; }
  .footer-directory { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 30px 22px; }
  .footer-column a { min-height: 44px; padding-block: 9px; }
  .footer-column:nth-last-child(-n + 2) { grid-column: 1 / -1; }
  .footer-column:nth-last-child(-n + 2) ul { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 22px; }
  .footer-mark { width: 76px; }
}
@media (max-width: 360px) {
  .entry-links { gap: 10px; }
  .entry-links a { padding-inline: 19px; gap: 26px; font-size: 14px; }
  .appearance-sheet, .language-sheet { padding: 25px; }
  .appearance-examples { gap: 10px; }
  .appearance-examples > div { padding: 17px 14px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; }
  .entry-links a:hover { transform: none; }
}