@charset "UTF-8";

:root {
  --ink: #112747;
  --muted: #64728a;
  --blue: #2864db;
  --sky: #eaf3ff;
  --pale: #f7fbff;
  --line: #bdcce2;
  --deep: #0d2241;
  --aqua: #22b6d7;
  --content: 1200px;
  --header-height: 80px;
}

* { box-sizing: border-box; }
html { min-width: 320px; scroll-behavior: smooth; }
body { min-width: 320px; margin: 0; color: var(--ink); background: #fff; font: 16px/1.7 "Microsoft YaHei", "PingFang SC", sans-serif; }
body.menu-open { overflow: hidden; }
a, button { -webkit-tap-highlight-color: transparent; }
a { color: inherit; text-decoration: none; }
button { appearance: none; font: inherit; }
img { display: block; max-width: 100%; }
h1, h2, h3, p { margin-top: 0; }
h1, h2, h3 { font-weight: 900; letter-spacing: -.06em; }
main { padding-top: var(--header-height); }
.shell, .header-inner { width: min(var(--content), calc(100% - 48px)); margin: 0 auto; }

.site-header { position: fixed; z-index: 50; top: 0; right: 0; left: 0; height: var(--header-height); border-bottom: 1px solid rgba(17, 39, 71, .13); background: rgba(255, 255, 255, .96); }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 100%; gap: 28px; }
.brand, .footer-brand { display: inline-flex; flex: 0 0 auto; align-items: center; gap: 10px; }
.brand img, .footer-brand img { width: 42px; height: 42px; object-fit: contain; }
.brand span, .footer-brand span { display: grid; line-height: 1.15; }
.brand strong, .footer-brand strong { font-size: 18px; font-weight: 900; }
.brand small, .footer-brand small { margin-top: 4px; color: var(--muted); font-size: 12px; white-space: nowrap; }
.main-nav ul { display: flex; gap: clamp(18px, 2.6vw, 41px); margin: 0; padding: 0; list-style: none; }
.main-nav a { position: relative; display: block; padding: 8px 0; font-size: 14px; font-weight: 800; }
.main-nav a::after { position: absolute; right: 0; bottom: 0; left: 0; height: 3px; background: var(--aqua); content: ""; transform: scaleX(0); }
.main-nav a:hover::after, .main-nav a:focus-visible::after { transform: scaleX(1); }
.header-actions { display: flex; flex: 0 0 auto; align-items: center; gap: 10px; }
.header-download, .primary-download, .download-ticket { display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 42px; border: 1px solid var(--blue); border-radius: 7px; background: var(--blue); color: #fff; font-size: 14px; font-weight: 900; line-height: 1; white-space: nowrap; }
.header-download { padding: 0 15px; }
.header-download:hover, .header-download:focus-visible, .primary-download:hover, .primary-download:focus-visible, .download-ticket:hover, .download-ticket:focus-visible { background: #174dae; outline: 2px solid var(--aqua); outline-offset: 2px; }
.download-mobile, .menu-button { display: none; }
.menu-button { width: 42px; height: 42px; padding: 8px; border: 1px solid var(--line); border-radius: 7px; background: #fff; cursor: pointer; }
.menu-button i { display: block; width: 19px; height: 2px; margin: 4px auto; background: var(--ink); }

.hero { display: grid; grid-template-columns: minmax(0, 1fr) minmax(390px, .82fr); gap: clamp(50px, 8vw, 125px); align-items: center; min-height: 650px; padding: 76px 0; }
.eyebrow { display: flex; align-items: center; gap: 7px; margin: 0 0 13px; color: var(--blue); font-size: 12px; font-weight: 900; letter-spacing: 1.3px; }
h1 { max-width: 570px; margin-bottom: 19px; font-size: clamp(52px, 6vw, 82px); line-height: .98; }
.hero-text { max-width: 525px; margin-bottom: 0; color: var(--muted); font-size: 17px; }
.hero-actions { display: grid; grid-template-columns: max-content max-content; gap: 17px 23px; align-items: center; justify-content: start; margin-top: 31px; }
.primary-download { grid-column: 1; grid-row: 1; min-height: 48px; padding: 0 20px; box-shadow: 5px 5px 0 #9fcef6; }
.hero-anchor { grid-column: 2; grid-row: 1; display: inline-flex; align-items: center; gap: 7px; font-size: 14px; font-weight: 900; }
.hero-anchor:hover, .hero-anchor:focus-visible { color: var(--blue); outline: 0; }
.age-label { grid-column: 1 / -1; grid-row: 2; width: max-content; margin: 0; padding: 3px 9px; border: 1px solid #9baec7; border-radius: 99px; color: var(--muted); font-size: 12px; line-height: 1.5; }
.trust-row { display: flex; flex-wrap: wrap; gap: 18px; margin-top: 29px; color: var(--muted); font-size: 13px; font-weight: 700; }
.trust-row span { display: inline-flex; align-items: center; gap: 6px; }
.hero-device { position: relative; width: min(100%, 430px); justify-self: end; padding: 13px 13px 0; border: 9px solid var(--deep); border-bottom: 0; border-radius: 31px 31px 0 0; background: var(--deep); box-shadow: 16px 17px 0 #c6e6ff; }
.hero-device::before { position: absolute; z-index: 1; top: 6px; left: 50%; width: 68px; height: 5px; border-radius: 99px; background: #53709e; content: ""; transform: translateX(-50%); }
.hero-device img { width: 100%; aspect-ratio: 9 / 16; border-radius: 19px 19px 0 0; background: var(--sky); object-fit: contain; }
.device-top { display: none; }
.device-glow { position: absolute; z-index: -1; top: 25%; right: -39px; width: 210px; height: 210px; border-radius: 50%; background: #bdeeff; filter: blur(6px); }
.device-note { position: absolute; display: flex; align-items: center; gap: 9px; padding: 10px 13px; border: 1px solid #bad0e9; border-radius: 7px; background: #fff; box-shadow: 0 8px 20px rgba(17, 39, 71, .12); font-size: 12px; line-height: 1.35; }
.device-note b { color: var(--ink); font-size: 13px; }
.note-one { top: 30%; left: -112px; }
.note-two { right: -99px; bottom: 17%; }

.tools-section { padding: 105px 0; background: var(--pale); }
.section-head { margin-bottom: 38px; }
.split-head { display: flex; align-items: end; justify-content: space-between; gap: 55px; }
.section-head h2 { margin: 0; font-size: clamp(39px, 4.7vw, 62px); line-height: 1; }
.split-head > p { width: min(410px, 100%); margin: 0 0 3px; color: var(--muted); }
.tool-grid { display: grid; grid-template-columns: 1.2fr repeat(3, 1fr); gap: 16px; }
.tool-card { min-height: 289px; padding: 26px 23px; border: 1px solid #c5d6ea; border-radius: 10px; background: #fff; }
.tool-card > i { display: block; width: 38px; height: 38px; margin-bottom: 36px; padding: 8px; border-radius: 8px; background-color: var(--sky); background-size: 22px; }
.tool-card > span { display: block; color: var(--blue); font-size: 12px; font-weight: 900; letter-spacing: .8px; }
.tool-card h3 { margin: 10px 0 11px; font-size: 23px; line-height: 1.25; }
.tool-card p { margin: 0; color: var(--muted); font-size: 14px; }
.tool-card a { display: inline-flex; align-items: center; gap: 7px; margin-top: 18px; color: var(--blue); font-size: 13px; font-weight: 900; }
.main-tool { grid-row: span 1; border-color: var(--deep); background: var(--deep); color: #fff; }
.main-tool > i { background-color: #234d94; filter: brightness(0) invert(1); }
.main-tool > span, .main-tool a { color: #8fd6ec; }
.main-tool p { color: #cfdaeb; }

.scenes-section { padding: 105px 0; }
.centered-head { text-align: center; }
.centered-head .eyebrow { justify-content: center; }
.title-rule { display: block; width: 60px; height: 4px; margin: 17px auto 15px; background: linear-gradient(90deg, var(--blue) 0 50%, var(--aqua) 50% 100%); }
.centered-head > p:last-child { margin: 0; color: var(--muted); }
.scene-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; margin-top: 40px; }
.scene-card { position: relative; min-height: 247px; padding: 27px 27px 23px; overflow: hidden; border: 1px solid var(--line); border-radius: 10px; background: #fff; }
.scene-card.active { border-color: var(--blue); background: #eef7ff; box-shadow: 8px 8px 0 #c1e3f8; }
.scene-card span { color: var(--aqua); font-size: 12px; font-weight: 900; letter-spacing: 1px; }
.scene-card h3 { margin: 37px 0 11px; font-size: 26px; }
.scene-card p { max-width: 280px; margin: 0; color: var(--muted); font-size: 14px; }
.scene-number { position: absolute; right: 18px; bottom: -21px; color: #e1ebf4; font-size: 96px; font-style: normal; font-weight: 900; letter-spacing: -.12em; line-height: 1; }
.scene-card.active .scene-number { color: #c9e8fb; }

.screens-section { padding: 105px 0; background: var(--deep); color: #fff; }
.screens-section .eyebrow { color: #90dff0; }
.screens-section .split-head > p { color: #c5d2e7; }
.screen-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px; }
.screen-grid figure { margin: 0; overflow: hidden; border: 1px solid #547092; border-radius: 8px; background: #fff; }
.screen-media { aspect-ratio: 9 / 16; padding: 9px; background: #eaf3ff; }
.screen-media img { width: 100%; height: 100%; object-fit: contain; }
.screen-grid figcaption { display: flex; align-items: center; gap: 10px; min-height: 58px; padding: 12px 15px; color: var(--ink); }
.screen-grid figcaption span { color: var(--blue); font-size: 12px; font-weight: 900; }
.screen-grid figcaption strong { font-size: 14px; }

.news-section, .help-section { padding-top: 105px; padding-bottom: 105px; }
.news-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.news-card { min-height: 253px; padding: 27px 29px; border: 1px solid var(--line); border-radius: 8px; background: #fff; box-shadow: 5px 5px 0 #edf4fb; }
.news-card time { color: var(--blue); font-size: 12px; font-weight: 900; }
.news-card h3 { margin: 10px 0; font-size: 22px; }
.news-card > p:not(.news-detail) { margin-bottom: 17px; color: var(--muted); }
.news-toggle { display: inline-flex; align-items: center; gap: 7px; padding: 0; border: 0; background: transparent; color: var(--ink); cursor: pointer; font-size: 14px; font-weight: 900; }
.news-toggle:hover, .news-toggle:focus-visible { color: var(--blue); outline: 0; }
.news-detail { margin: 15px 0 0; padding-top: 13px; border-top: 1px dashed #b8c9dc; color: var(--muted); font-size: 14px; }
.help-section { padding-bottom: 38px; border-top: 1px solid #d2dfec; }
.faq-list { border-top: 1px solid var(--line); }
.faq-item { border-bottom: 1px solid var(--line); }
.faq-item button { display: grid; grid-template-columns: 55px 1fr 27px; width: 100%; padding: 21px 0; border: 0; background: transparent; color: var(--ink); cursor: pointer; font-size: 18px; font-weight: 900; text-align: left; }
.faq-item button span { color: var(--blue); font-size: 12px; }
.faq-item button b, .official-toggle b { font-size: 26px; font-weight: 400; line-height: .75; text-align: right; }
.faq-item button:hover, .faq-item button:focus-visible { color: var(--blue); outline: 0; }
.faq-item.is-open button b, .official-section.is-open .official-toggle b { transform: rotate(45deg); }
.faq-answer p { max-width: 720px; margin: -2px 30px 24px 55px; color: var(--muted); }
.official-section { padding-top: 0; padding-bottom: 105px; }
.official-toggle { display: grid; grid-template-columns: 36px 1fr 30px; align-items: center; width: 100%; min-height: 72px; padding: 15px 21px; border: 1px solid var(--line); border-radius: 7px; background: #fff; color: var(--ink); cursor: pointer; font-size: 17px; font-weight: 900; text-align: left; }
.official-toggle:hover, .official-toggle:focus-visible { border-color: var(--blue); background: var(--sky); outline: 2px solid var(--aqua); outline-offset: 2px; }
.official-content { padding: 20px 56px; border: 1px solid var(--line); border-top: 0; border-radius: 0 0 7px 7px; background: #fff; }
.official-content a { color: var(--blue); font-size: 14px; font-weight: 900; overflow-wrap: anywhere; }

.reviews-section { padding: 105px 0; background: #eff7ff; }
.review-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.review-card { display: flex; flex-direction: column; min-height: 280px; padding: 22px 24px; border: 1px solid #a9c1db; border-radius: 8px; background: #fff; }
.review-card:nth-child(even) { background: #f8fbff; }
.review-head { display: flex; align-items: center; justify-content: space-between; gap: 10px; }
.review-head span { display: inline-flex; align-items: center; gap: 8px; font-size: 14px; font-weight: 900; }
.review-head em { color: var(--muted); font-size: 12px; font-style: normal; white-space: nowrap; }
.review-card > p { flex: 1; margin: 19px 0 17px; font-size: 14px; font-weight: 600; }
.review-card time { padding-top: 12px; border-top: 1px solid #d6e1ed; color: var(--muted); font-size: 12px; text-align: right; }

.download-section { display: flex; align-items: center; justify-content: space-between; gap: 40px; margin-top: 105px; margin-bottom: 105px; padding: 47px 55px; border-radius: 12px; background: linear-gradient(110deg, var(--blue), #1b92ca); box-shadow: 10px 10px 0 #b9e3fb; color: #fff; }
.download-section .eyebrow { color: #d6f7ff; }
.download-section h2 { margin: 0 0 13px; font-size: clamp(32px, 4vw, 50px); line-height: 1; white-space: nowrap; }
.download-section > div > p:last-child { margin: 0; color: #e7f5ff; }
.download-ticket { flex: 0 0 auto; min-width: 140px; padding: 0 20px; border-color: #fff; background: #fff; color: var(--blue); }
.download-ticket:hover, .download-ticket:focus-visible { background: var(--deep); color: #fff; }

.site-footer { padding: 57px max(24px, calc((100% - var(--content)) / 2)) 17px; background: #0b1f3a; color: #fff; }
.footer-main { display: flex; justify-content: space-between; gap: 65px; }
.footer-brand { align-self: start; min-width: 225px; }
.footer-brand small { color: #c5d6e9; }
.footer-links { display: grid; grid-template-columns: repeat(4, minmax(100px, 1fr)); flex: 1; gap: clamp(21px, 5vw, 75px); }
.footer-links section { display: grid; align-content: start; gap: 6px; }
.footer-links h3 { margin: 0 0 8px; font-size: 15px; letter-spacing: 0; }
.footer-links a { color: #cad8e8; font-size: 13px; }
.footer-links a:hover, .footer-links a:focus-visible { color: #8fdff3; outline: 0; }
.footer-social div { display: flex; gap: 8px; }
.footer-social a { display: grid; width: 37px; height: 37px; place-items: center; border: 1px solid rgba(255, 255, 255, .23); border-radius: 50%; background: rgba(255, 255, 255, .06); }
.footer-social a:hover, .footer-social a:focus-visible { background: var(--blue); outline: 2px solid var(--aqua); outline-offset: 2px; }
.footer-social i { filter: brightness(0) invert(1); }
.footer-divider { width: 100%; height: 1px; margin-top: 43px; background: rgba(255, 255, 255, .85); }
.copyright { margin: 14px 0 0; color: #cad8e8; font-size: 12px; text-align: center; }
.back-top { position: fixed; z-index: 30; right: 22px; bottom: 22px; display: grid; width: 44px; height: 44px; place-items: center; border: 1px solid var(--deep); border-radius: 50%; background: #93dcf0; box-shadow: 3px 3px 0 var(--deep); }
.back-top i { color: var(--deep); font-size: 23px; font-style: normal; font-weight: 900; }
.back-top i::before { content: "↑"; }

i[class^="icon-"] { display: inline-block; width: 18px; height: 18px; flex: 0 0 18px; background-position: center; background-repeat: no-repeat; background-size: contain; }
.icon-download { background-image: url("../icons/download.svg"); filter: brightness(0) invert(1); }
.download-ticket .icon-download { filter: none; }
.icon-arrow { background-image: url("../icons/arrow.svg"); }
.icon-bolt { background-image: url("../icons/bolt.svg"); }
.icon-shield { background-image: url("../icons/shield.svg"); }
.icon-clock { background-image: url("../icons/clock.svg"); }
.icon-folder { background-image: url("../icons/folder.svg"); }
.icon-user { background-image: url("../icons/user.svg"); }
.icon-globe { background-image: url("../icons/globe.svg"); }
.icon-star { background-image: url("../icons/star.svg"); }
.icon-bookmark { background-image: url("../icons/bookmark.svg"); }

.hero-carousel { position: relative; width: min(100%, 300px); justify-self: end; overflow: hidden; border: 1px solid var(--line); border-radius: 10px; background: var(--sky); box-shadow: 12px 12px 0 #8bcdf1; }
.carousel-track { display: flex; transition: transform .45s ease; }
.carousel-slide { flex: 0 0 100%; margin: 0; }
.carousel-slide img { width: 100%; aspect-ratio: 9 / 16; background: var(--sky); object-fit: contain; }
.carousel-slide figcaption { display: flex; align-items: center; justify-content: space-between; min-height: 64px; padding: 13px 17px; border-top: 1px solid var(--line); background: #fff; }
.carousel-slide figcaption span { color: var(--blue); font-size: 12px; font-weight: 900; }
.carousel-slide figcaption strong { font-size: 15px; }
.carousel-controls { position: absolute; right: 10px; bottom: 75px; display: flex; align-items: center; gap: 7px; padding: 5px; border: 1px solid var(--line); background: rgba(255,255,255,.92); }
.carousel-controls button { border: 0; background: transparent; cursor: pointer; }
.carousel-dots { display: flex; gap: 5px; }
.carousel-dots button { width: 8px; height: 8px; padding: 0; border-radius: 50%; background: #a9b8c9; }
.carousel-dots button.is-active { background: var(--blue); }

@media (max-width: 960px) {
  .header-inner { gap: 16px; }
  .main-nav ul { gap: 15px; }
  .main-nav a { font-size: 13px; }
  .hero { grid-template-columns: minmax(0, 1fr) minmax(330px, .8fr); gap: 40px; }
  .note-one { left: -72px; }
  .note-two { right: -57px; }
  .tool-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-main { gap: 36px; }
  .footer-brand { min-width: 170px; }
  .footer-links { gap: 20px; }
}

@media (max-width: 700px) {
  :root { --header-height: 68px; }
  .shell, .header-inner { width: min(100% - 32px, 560px); }
  .header-inner { gap: 8px; }
  .brand { gap: 7px; }
  .brand img { width: 36px; height: 36px; }
  .brand strong { font-size: 15px; }
  .brand small { font-size: 12px; }
  .main-nav { position: absolute; top: 100%; right: 0; left: 0; width: 100%; padding: 8px 32px; border: 1px solid var(--line); background: #fff; box-shadow: 0 5px 12px rgba(17, 39, 71, .16); opacity: 0; pointer-events: none; transform: translateY(-7px); }
  .main-nav.is-open { opacity: 1; pointer-events: auto; transform: translateY(0); }
  .main-nav ul { display: block; }
  .main-nav li { border-bottom: 1px solid #dbe5f0; }
  .main-nav li:last-child { border-bottom: 0; }
  .main-nav a { padding: 12px 0; font-size: 15px; text-align: center; white-space: nowrap; }
  .main-nav a::after { display: none; }
  .download-desktop { display: none; }
  .download-mobile { display: inline; }
  .header-download { min-height: 39px; padding: 0 10px; font-size: 13px; }
  .menu-button { display: block; flex: 0 0 40px; width: 40px; height: 40px; }
  .hero { grid-template-columns: 1fr; justify-items: center; min-height: 0; padding: 55px 0 69px; text-align: center; }
  .hero-copy { display: grid; justify-items: center; }
  .hero .eyebrow { justify-content: center; }
  h1 { font-size: clamp(47px, 15vw, 65px); }
  .hero-text { max-width: 490px; font-size: 15px; }
  .hero-actions { display: flex; flex-direction: column; justify-content: center; gap: 18px; }
  .hero-actions .primary-download { order: 1; }
  .hero-actions .age-label { order: 2; margin-top: -3px; }
  .hero-actions .hero-anchor { order: 3; }
  .trust-row { justify-content: center; }
  .hero-device { justify-self: center; width: min(100%, 350px); margin-top: 7px; box-shadow: 8px 9px 0 #c6e6ff; }
  .hero-carousel { justify-self: center; width: min(100%, 350px); margin-top: 7px; box-shadow: 8px 9px 0 #8bcdf1; }
  .carousel-controls { bottom: 75px; }
  .device-note { display: none; }
  .tools-section, .scenes-section, .screens-section, .news-section, .help-section, .reviews-section { padding-top: 69px; padding-bottom: 69px; }
  .official-section { padding-top: 0; padding-bottom: 69px; }
  .split-head { display: block; }
  .split-head > p { width: auto; margin-top: 20px; }
  .section-head h2 { font-size: 42px; }
  .tool-grid, .scene-grid, .news-grid, .review-grid { grid-template-columns: 1fr; }
  .tool-card { min-height: 0; }
  .tool-card > i { margin-bottom: 25px; }
  .scene-card { min-height: 220px; }
  .screen-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
  .screen-media { padding: 6px; }
  .screen-grid figcaption { min-height: 51px; padding: 9px 10px; }
  .screen-grid figcaption strong { font-size: 13px; }
  .news-card { min-height: 0; padding: 23px 21px; }
  .help-section { padding-bottom: 29px; }
  .faq-item button { grid-template-columns: 40px 1fr 20px; font-size: 16px; }
  .faq-answer p { margin-left: 40px; }
  .official-toggle { grid-template-columns: 30px 1fr 23px; min-height: 65px; padding: 13px 15px; font-size: 15px; }
  .official-content { padding: 18px 20px; }
  .review-card { min-height: 0; }
  .download-section { display: grid; gap: 28px; margin-top: 69px; margin-bottom: 69px; padding: 40px 24px; }
  .download-section h2 { font-size: 34px; }
  .download-ticket { width: max-content; }
  .site-footer { padding: 47px 22px 15px; }
  .footer-main { display: block; }
  .footer-brand { display: flex; width: 100%; justify-content: center; margin-bottom: 31px; }
  .footer-links { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px 10px; text-align: center; }
  .footer-links h3 { font-size: 14px; }
  .footer-links a { font-size: 12px; }
  .footer-social { grid-column: 1 / -1; margin-top: 13px; }
  .footer-social div { justify-content: center; }
  .footer-divider { margin-top: 30px; }
  .back-top { right: 14px; bottom: 15px; width: 40px; height: 40px; }
}