@charset "UTF-8";

:root {
    --brand: #f46d7a;
    --brand-dark: #d95263;
    --brand-soft: #fff0f2;
    --lime: #e4ff9a;
    --ink: #18233a;
    --muted: #657088;
    --line: #e8eaf0;
    --surface: #ffffff;
    --surface-soft: #fafbfc;
    --deep: #17233a;
    --shadow: 0 18px 44px rgba(42, 55, 82, .12);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 96px; }
body { margin: 0; min-width: 320px; padding-top: 76px; color: var(--ink); background: var(--surface); font: 16px/1.7 "Microsoft YaHei", "PingFang SC", Arial, sans-serif; }
a { color: inherit; text-decoration: none; -webkit-tap-highlight-color: transparent; }
button { font: inherit; -webkit-tap-highlight-color: transparent; }
img { display: block; max-width: 100%; }

.site-header { position: fixed; top: 0; right: 0; left: 0; z-index: 100; border-bottom: 1px solid rgba(232, 234, 240, .95); background: rgba(255, 255, 255, .94); box-shadow: 0 4px 14px rgba(20, 33, 55, .04); backdrop-filter: blur(10px); }
.site-header__inner { display: flex; align-items: center; width: min(1180px, calc(100% - 40px)); min-height: 76px; margin: 0 auto; gap: 38px; }
.site-brand, .footer-brand { display: inline-flex; align-items: center; min-width: 0; gap: 8px; font-weight: 800; white-space: nowrap; }
.site-brand img, .footer-brand img { width: 38px; height: 38px; border-radius: 50%; object-fit: cover; }
.site-brand__identity { display: flex; flex-direction: column; align-items: flex-start; min-width: 0; line-height: 1.15; }
.site-brand__text { font-size: 20px; letter-spacing: -.7px; }
.site-brand__domain { margin-top: 3px; color: var(--muted); font-size: 12px; font-weight: 400; letter-spacing: 0; }
.footer-brand small { color: var(--muted); font-size: 12px; font-weight: 400; }
.site-nav { margin-left: auto; }
.site-nav ul, .footer-nav ul { display: flex; flex-direction: row; flex-wrap: wrap; align-items: center; margin: 0; padding: 0; list-style: none; }
.site-nav ul { gap: 30px; }
.site-nav a { position: relative; display: block; padding: 7px 0; color: #48536a; font-size: 15px; font-weight: 700; }
.site-nav a::after { position: absolute; right: 0; bottom: 0; left: 0; height: 3px; border-radius: 3px; background: var(--brand); content: ""; transform: scaleX(0); transition: transform .2s ease; }
.site-nav a:hover::after, .site-nav a:focus-visible::after { transform: scaleX(1); }
.site-header__actions { display: flex; align-items: center; gap: 12px; }
.header-download, .button { display: inline-flex; justify-content: center; align-items: center; min-height: 42px; padding: 0 21px; border: 1px solid transparent; border-radius: 6px; background: var(--brand); color: #fff; font-size: 14px; font-weight: 800; transition: background .2s ease, transform .2s ease; }
.header-download:hover, .button:hover { background: var(--brand-dark); transform: translateY(-1px); }
.menu-toggle { display: none; justify-content: center; align-items: center; width: 38px; height: 38px; padding: 0; border: 1px solid var(--line); border-radius: 6px; background: #fff; cursor: pointer; }
.menu-toggle img { width: 19px; }

.hero { overflow: hidden; background: radial-gradient(circle at 77% 42%, rgba(228, 255, 154, .62) 0, rgba(228, 255, 154, .24) 19%, transparent 43%), linear-gradient(135deg, #fff 0%, #fffafd 52%, #f7fff0 100%); }
.hero__inner { display: flex; align-items: center; width: min(1200px, calc(100% - 40px)); padding: 72px 0 84px; margin: 0 auto; gap: clamp(48px, 7vw, 108px); }
.hero__copy { flex: 1 1 auto; max-width: 620px; }
.eyebrow, .section-index, .feature-card__number { margin: 0; color: var(--brand-dark); font-size: 12px; font-weight: 900; letter-spacing: .11em; }
.eyebrow { display: inline-block; padding: 6px 12px; border-radius: 999px; background: var(--brand-soft); letter-spacing: .04em; }
h1, h2, h3, p { margin-top: 0; }
h1 { margin: 16px 0 18px; font-size: clamp(42px, 6vw, 72px); line-height: 1.08; letter-spacing: -.07em; }
.hero__lead { max-width: 600px; margin-bottom: 28px; color: var(--muted); font-size: 18px; }
.hero__actions { display: inline-flex; flex-direction: column; align-items: center; gap: 12px; }
.button { min-height: 48px; padding: 0 28px; font-size: 16px; }
.age-label { color: var(--muted); font-size: 12px; }
.hero__carousel { flex: 0 0 auto; width: clamp(280px, 30vw, 360px); height: clamp(498px, 53.333vw, 640px); padding: 0; margin-left: auto; overflow: hidden; border: 4px solid var(--deep); border-radius: 6px; background: #fff; box-shadow: var(--shadow); }
.app-swiper, .app-swiper .swiper-wrapper, .app-swiper .swiper-slide { width: 100%; height: 100%; }
.app-swiper .swiper-slide { display: flex; justify-content: center; align-items: center; background: #fff; }
.app-swiper .swiper-slide img { width: 100%; height: 100%; object-fit: contain; object-position: center; }
.app-swiper .swiper-pagination { right: 0; bottom: 12px; left: 0; display: flex; justify-content: center; gap: 7px; }
.app-swiper .swiper-pagination-bullet { width: 22px; height: 4px; margin: 0 !important; border-radius: 5px; background: #c8ced9; opacity: 1; }
.app-swiper .swiper-pagination-bullet-active { background: var(--brand); }

.section { scroll-margin-top: 96px; padding: 96px 0; }
.section__inner { width: min(1080px, calc(100% - 40px)); margin: 0 auto; }
.section-heading { margin-bottom: 36px; }
.section-heading h2, .download h2 { margin: 6px 0 8px; font-size: clamp(30px, 4vw, 44px); line-height: 1.2; letter-spacing: -.05em; }
.section-heading > p:last-child { max-width: 620px; margin-bottom: 0; color: var(--muted); }
.section-heading--split { display: flex; justify-content: space-between; align-items: end; gap: 30px; }
.section-heading--split > p { max-width: 370px; text-align: right; }
.features { background: var(--surface-soft); }
.feature-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px; }
.feature-card { min-height: 218px; padding: 30px; border: 1px solid var(--line); border-radius: 6px; background: #fff; }
.feature-card--featured { display: grid; grid-column: 1 / -1; grid-template-columns: 92px 1fr; align-items: center; min-height: 190px; gap: 25px; background: linear-gradient(115deg, #fff 0%, #fff7f8 100%); }
.feature-card__icon { display: flex; justify-content: center; align-items: center; width: 60px; height: 60px; margin-bottom: 22px; border-radius: 50%; background: var(--brand-soft); }
.feature-card--featured .feature-card__icon { width: 92px; height: 92px; margin: 0; background: #efffd0; }
.feature-card__icon img { width: 30px; height: 30px; }
.feature-card--featured .feature-card__icon img { width: 42px; height: 42px; }
.feature-card h3, .rhythm-card h3 { margin: 5px 0 7px; font-size: 22px; }
.feature-card p:last-child, .rhythm-card p { margin-bottom: 0; color: var(--muted); font-size: 14px; }
.reading-rhythm { border-top: 1px solid #f5e8eb; background: linear-gradient(135deg, #fff7f8 0%, #fff 58%, #fbfff1 100%); }
.rhythm__inner { display: grid; grid-template-columns: .86fr 1.14fr; align-items: center; gap: 56px; }
.rhythm__copy > p:last-child { max-width: 420px; margin-bottom: 0; color: var(--muted); }
.rhythm-cards { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.rhythm-card { min-height: 210px; padding: 28px; border: 1px solid #f1dce0; border-radius: 6px; background: #fff; }
.rhythm-card--accent { border-color: #dbeab8; background: #f6ffdf; }
.rhythm-card span { color: var(--brand); font-size: 13px; font-weight: 900; }
.faq { background: #f8fafc; }
.faq-list { max-width: 920px; }
.faq-list details { margin-bottom: 11px; overflow: hidden; border: 1px solid var(--line); border-radius: 6px; background: #fff; }
.faq-list summary { display: flex; justify-content: space-between; align-items: center; gap: 20px; padding: 20px 23px; cursor: pointer; font-weight: 800; list-style: none; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary span { color: var(--brand-dark); font-size: 26px; font-weight: 400; line-height: 1; transition: transform .2s ease; }
.faq-list details[open] { border-left: 4px solid var(--brand); }
.faq-list details[open] summary span { transform: rotate(45deg); }
.faq-list details p { padding: 0 23px 20px; margin-bottom: 0; color: var(--muted); font-size: 15px; }
.faq-list details p a { color: var(--brand-dark); font-weight: 800; }
.reviews { background: #fff; }
.review-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 22px; }
.review-card { display: flex; flex-direction: column; min-height: 190px; padding: 23px; border: 1px solid var(--line); border-radius: 6px; background: #fff; }
.review-card__head, .reviewer { display: flex; align-items: center; }
.review-card__head { justify-content: space-between; gap: 14px; }
.reviewer { gap: 9px; font-weight: 800; }
.reviewer img { width: 30px; height: 30px; }
.review-rating { color: var(--brand-dark); font-size: 13px; letter-spacing: 1px; }
.review-card > p { flex: 1; margin: 18px 0; color: #4b566c; font-size: 14px; }
.review-card time { color: var(--muted); font-size: 12px; }
.download { scroll-margin-top: 96px; position: relative; overflow: hidden; border-top: 5px dotted var(--brand); background: linear-gradient(115deg, #17233a 0%, #22355a 100%); color: #fff; }
.download::after { position: absolute; top: -90px; right: 7%; width: 260px; height: 260px; border: 1px solid rgba(228, 255, 154, .28); border-radius: 50%; content: ""; }
.download__inner { position: relative; z-index: 1; display: flex; justify-content: space-between; align-items: center; width: min(1080px, calc(100% - 40px)); padding: 55px 0; margin: 0 auto; gap: 32px; }
.download .section-index { color: var(--lime); }
.download h2 { margin-top: 8px; color: var(--lime); }
.download p:last-child { margin-bottom: 0; color: rgba(255,255,255,.72); }
.button--light { flex: 0 0 auto; border-color: var(--brand); background: var(--brand); }
.site-footer { background: #fff; }
.site-footer__inner { display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; width: min(1180px, calc(100% - 40px)); min-height: 150px; margin: 0 auto; gap: 30px; }
.footer-brand span { font-size: 18px; }
.footer-nav ul { justify-content: center; gap: 10px 22px; }
.footer-nav a, .site-footer__inner > p { color: var(--muted); font-size: 13px; }
.site-footer__inner > p { margin: 0; text-align: right; }
.back-to-top { position: fixed; right: 24px; bottom: 24px; z-index: 90; display: flex; justify-content: center; align-items: center; width: 44px; height: 44px; padding: 0; border: 0; border-radius: 50%; background: var(--brand); box-shadow: 0 10px 25px rgba(244, 109, 122, .32); cursor: pointer; opacity: 0; pointer-events: none; transform: translateY(10px); transition: opacity .2s ease, transform .2s ease; }
.back-to-top.is-visible { opacity: 1; pointer-events: auto; transform: translateY(0); }
.back-to-top img { width: 19px; filter: brightness(0) invert(1); }

@media (max-width: 980px) {
    .site-header__inner { gap: 18px; }
    .site-nav { position: absolute; top: calc(100% + 1px); right: 0; left: 0; display: none; padding: 12px 20px 18px; border-bottom: 1px solid var(--line); background: rgba(255, 255, 255, .98); box-shadow: 0 12px 22px rgba(20, 33, 55, .07); }
    .site-nav.is-open { display: block; }
    .site-nav ul { flex-direction: column; align-items: stretch; gap: 0; width: min(1180px, calc(100% - 40px)); margin: 0 auto; }
    .site-nav a { padding: 12px 0; }
    .site-nav a::after { right: auto; width: 24px; }
    .menu-toggle { display: inline-flex; }
    .rhythm__inner { gap: 34px; }
    .site-footer__inner { grid-template-columns: 1fr; justify-items: center; padding: 30px 0; text-align: center; }
    .site-footer__inner > p { text-align: center; }
}

@media (max-width: 700px) {
    html { scroll-padding-top: 84px; }
    body { padding-top: 70px; }
    .site-header__inner { width: min(100% - 28px, 1180px); min-height: 70px; gap: 8px; }
    .site-brand { gap: 5px; overflow: hidden; }
    .site-brand img { width: 29px; height: 29px; }
    .site-brand__text { font-size: 16px; }
    .site-brand__identity { overflow: hidden; }
    .site-brand__domain { overflow: hidden; font-size: 12px; text-overflow: ellipsis; }
    .site-header__actions { margin-left: auto; gap: 7px; }
    .header-download { min-height: 34px; padding: 0 10px; font-size: 12px; }
    .menu-toggle { width: 34px; height: 34px; }
    .site-nav ul { width: min(100% - 28px, 1180px); }
    .hero__inner { flex-direction: column; width: min(100% - 28px, 1100px); padding: 54px 0 72px; margin: 0 auto; gap: 42px; text-align: center; }
    .hero__copy { max-width: 620px; }
    .hero__lead { margin-right: auto; margin-left: auto; font-size: 16px; }
    .hero__carousel { align-self: center; width: min(100%, 330px); height: min(calc((100vw - 28px) * 1.7778), 586px); margin-left: 0; }
    .section, .reading-rhythm { scroll-margin-top: 84px; padding: 72px 0; }
    .section__inner, .download__inner { width: min(100% - 28px, 1080px); }
    .section-heading--split, .rhythm__inner, .download__inner { grid-template-columns: 1fr; flex-direction: column; align-items: flex-start; }
    .section-heading--split > p { max-width: none; text-align: left; }
    .feature-grid, .rhythm-cards { grid-template-columns: 1fr; }
    .feature-card--featured { grid-column: auto; grid-template-columns: 1fr; }
    .feature-card--featured .feature-card__icon { width: 60px; height: 60px; }
    .feature-card--featured .feature-card__icon img { width: 30px; height: 30px; }
    .feature-card { min-height: 0; }
    .download__inner { padding: 46px 0; }
    .download__inner .button--light { align-self: center; }
    .site-footer__inner { width: min(100% - 28px, 1180px); }
    .footer-nav ul { flex-direction: row; flex-wrap: wrap; }
    .back-to-top { right: 14px; bottom: 14px; }
}

@media (max-width: 390px) {
    .site-header__inner { gap: 6px; }
    .header-download { padding: 0 8px; }
    .section-heading h2, .download h2 { font-size: 30px; }
}