@font-face { font-family: AppSans; src: url('assets/fonts/Alibaba_PuHuiTi_2.0_55_Regular.ttf') format('truetype'); font-display: swap; }
@font-face { font-family: AppSans; src: url('assets/fonts/Alibaba_PuHuiTi_2.0_65_Medium.ttf') format('truetype'); font-weight: 600; font-display: swap; }

:root { --ink: #3a3026; --muted: #776b5e; --cream: #f5efe7; --surface: #ece2d6; --gold: #ead89f; --gold-deep: #d6bd78; --green: #5e8f66; --line: #e5dbcf; --dark: #42382d; --white: #fffdf9; }
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--cream); font-family: AppSans, "Microsoft YaHei", sans-serif; font-size: 16px; line-height: 1.6; }
a { color: inherit; text-decoration: none; }
.container { width: min(1160px, calc(100% - 80px)); margin: 0 auto; }
.section-padding { padding: 112px 0; }
.site-header { position: sticky; top: 0; z-index: 20; background: rgba(245,239,231,.94); border-bottom: 1px solid rgba(229,219,207,.8); backdrop-filter: blur(16px); }
.header-inner { height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 32px; }
.brand { display: inline-flex; align-items: center; gap: 11px; font-size: 20px; font-weight: 600; letter-spacing: .02em; }
.brand-mark { display: inline-flex; align-items: center; justify-content: center; width: 34px; height: 34px; border-radius: 11px; background: var(--gold); box-shadow: inset 0 0 0 1px rgba(58,48,38,.08); }
.brand-mark img { width: 24px; height: 24px; }
.site-nav { display: flex; align-items: center; gap: 34px; margin-left: auto; color: var(--muted); font-size: 14px; }
.site-nav a, .footer-links a, .footer-bottom a { transition: color .2s ease; }
.site-nav a:hover, .footer-links a:hover, .footer-bottom a:hover { color: var(--ink); }
.header-download { display: inline-flex; align-items: center; gap: 9px; padding: 10px 17px; border: 1px solid var(--ink); border-radius: 999px; font-size: 14px; transition: background .2s ease, color .2s ease; }
.header-download:hover { color: var(--cream); background: var(--ink); }
.hero { padding-top: 92px; overflow: hidden; }
.hero-grid { display: grid; grid-template-columns: minmax(0, .92fr) minmax(460px, 1.08fr); align-items: center; gap: 72px; }
.eyebrow, .section-kicker, .card-label, .footer-title { margin: 0 0 16px; color: var(--green); font-size: 13px; letter-spacing: .08em; }
.hero h1 { max-width: 660px; margin: 0; font-size: clamp(48px, 6vw, 78px); font-weight: 600; line-height: 1.12; letter-spacing: -.04em; }
.hero h1 em { color: var(--green); font-style: normal; }
.hero-description { max-width: 500px; margin: 30px 0 0; color: var(--muted); font-size: 17px; line-height: 1.9; }
.hero-actions { display: flex; align-items: center; gap: 26px; margin-top: 36px; }
.button { display: inline-flex; align-items: center; justify-content: center; gap: 12px; min-height: 50px; padding: 0 23px; border-radius: 999px; font-size: 15px; }
.button-primary { background: var(--ink); color: var(--cream); transition: transform .2s ease, background .2s ease; }
.button-primary:hover { background: #594b3d; transform: translateY(-2px); }
.text-link, .card-link { color: var(--ink); font-size: 14px; border-bottom: 1px solid var(--gold-deep); padding-bottom: 3px; }
.hero-proof { display: flex; align-items: center; flex-wrap: wrap; gap: 11px; margin-top: 66px; color: var(--muted); font-size: 13px; }
.proof-mark { display: inline-flex; width: 20px; height: 20px; align-items: center; justify-content: center; border-radius: 50%; color: var(--ink); background: var(--gold); font-size: 12px; }
.proof-divider { width: 1px; height: 15px; background: var(--line); margin: 0 5px; }
.hero-visual { position: relative; min-height: 560px; }
.hero-visual:before { content: ""; position: absolute; inset: 54px 4px 20px 50px; border-radius: 42% 42% 28% 30%; background: var(--gold); opacity: .54; transform: rotate(-7deg); }
.visual-note { position: absolute; right: 3px; top: 7px; color: var(--muted); font-size: 12px; letter-spacing: .05em; }
.phone { position: absolute; width: 244px; height: 490px; border: 8px solid var(--ink); border-radius: 30px; background: var(--white); box-shadow: 0 23px 40px rgba(58,48,38,.16); overflow: hidden; }
.phone-back { left: 79px; top: 49px; transform: rotate(-10deg); opacity: .64; }
.phone-front { right: 36px; top: 35px; transform: rotate(7deg); }
.phone-topline { display: flex; justify-content: space-between; padding: 8px 14px 0; color: var(--ink); font-family: Arial, sans-serif; font-size: 9px; }
.phone-content { padding: 20px 17px; }
.home-screen { padding: 17px 13px 62px; }
.home-app-bar, .books-app-bar { display: flex; align-items: center; justify-content: space-between; color: var(--ink); font-size: 11px; }
.home-app-bar strong, .books-app-bar strong { font-size: 16px; font-weight: 600; }
.home-app-bar span { color: var(--muted); font-size: 10px; }
.home-filter { display: flex; gap: 14px; margin-top: 18px; padding-bottom: 9px; border-bottom: 1px solid var(--line); color: var(--muted); font-size: 9px; }
.home-filter span { position: relative; white-space: nowrap; }
.home-filter span.active { color: var(--ink); font-weight: 600; }
.home-filter span.active::after { content: ""; position: absolute; right: 3px; bottom: -10px; left: 3px; height: 2px; background: var(--green); }
.home-filter b { margin-left: 2px; color: var(--green); font-family: Arial, sans-serif; font-size: 8px; font-weight: 600; }
.home-task { margin-top: 16px; padding: 13px 11px 11px; border-radius: 8px; background: var(--surface); }
.task-meta { display: flex; justify-content: space-between; color: var(--muted); font-size: 8px; }
.task-meta span:first-child { color: var(--green); }
.home-task > strong { display: block; margin-top: 8px; font-size: 13px; font-weight: 600; }
.home-task .progress-caption { margin-top: 13px; font-size: 8px; }.home-task .progress-caption b { color: var(--green); font-weight: 600; }
.home-task .progress-track { height: 4px; margin-top: 6px; }.home-task .progress-track span { width: 60%; }
.mini-task-words { display: grid; grid-template-columns: 1fr 1fr; gap: 5px 8px; margin-top: 13px; color: var(--muted); font-family: Georgia, serif; font-size: 9px; }.mini-task-words span:last-child { grid-column: span 2; }
.task-status { display: flex; justify-content: space-between; margin-top: 14px; color: var(--muted); font-size: 8px; }.task-status span:first-child { color: var(--green); }.task-status .done { color: var(--green); }
.compact-task { margin-top: 9px; padding: 10px 11px; }.compact-task > strong { margin-top: 5px; font-size: 11px; }
.books-screen { padding: 18px 14px 50px; }.books-current { margin-top: 20px; padding: 13px; border-radius: 8px; background: var(--surface); }.books-current small { display: block; color: var(--muted); font-size: 8px; }.books-current strong { display: block; margin-top: 8px; font-size: 13px; font-weight: 600; }.books-current span { display: block; margin-top: 8px; color: var(--green); font-size: 8px; }.books-select-title { margin-top: 24px; font-size: 12px; font-weight: 600; }.books-filter { display: flex; align-items: center; gap: 7px; margin-top: 13px; color: var(--muted); font-size: 8px; }.books-filter b { padding: 4px 7px; border-radius: 99px; color: var(--ink); background: var(--gold); font-weight: 600; }.books-row { display: flex; justify-content: space-between; margin-top: 12px; padding-bottom: 10px; border-bottom: 1px solid var(--line); font-size: 9px; }.books-row small { color: var(--muted); font-size: 8px; }
.phone-greeting { color: var(--muted); font-size: 11px; }
.phone-title { margin-top: 5px; font-size: 20px; font-weight: 600; }
.progress-track { height: 5px; margin-top: 19px; border-radius: 99px; background: var(--surface); overflow: hidden; }
.progress-track span { display: block; width: 59%; height: 100%; background: var(--green); }
.progress-caption { display: flex; justify-content: space-between; margin-top: 8px; color: var(--muted); font-size: 10px; }
.progress-caption strong { color: var(--green); font-weight: 600; }
.word-card { margin-top: 30px; padding: 22px 15px 20px; border-radius: 12px; background: var(--surface); }
.word-label { display: block; color: var(--muted); font-size: 10px; }
.word-card strong { display: block; margin-top: 14px; font-family: Georgia, serif; font-size: 25px; letter-spacing: -.03em; }
.word-card small { color: var(--green); font-size: 11px; }
.word-card-rule { height: 1px; margin: 18px 0 12px; background: rgba(58,48,38,.14); }
.word-card p { margin: 0; font-size: 11px; }
.phone-actions { display: flex; justify-content: space-between; margin-top: 21px; color: var(--muted); font-size: 10px; }
.phone-nav { position: absolute; right: 0; bottom: 0; left: 0; display: flex; justify-content: space-around; padding: 12px 9px 14px; border-top: 1px solid var(--line); color: var(--muted); font-size: 8px; }
.phone-nav span { width: auto; height: auto; border-radius: 0; background: transparent; }
.phone-nav span.active { color: var(--green); background: transparent; font-weight: 600; }
.fake-line { width: 100%; height: 7px; margin-bottom: 12px; border-radius: 4px; background: var(--surface); }
.fake-line.short { width: 54%; }.fake-word { margin: 45px 0 17px; font-family: Georgia, serif; font-size: 27px; }.fake-block { height: 100px; margin-top: 30px; border-radius: 12px; background: var(--surface); }.muted-screen { padding: 40px 19px; }
.floating-label { position: absolute; display: flex; align-items: center; gap: 8px; padding: 9px 13px; border-radius: 8px; color: var(--ink); background: var(--white); box-shadow: 0 10px 25px rgba(58,48,38,.1); font-size: 12px; }
.floating-label span { color: var(--green); font-family: Arial, sans-serif; font-size: 10px; }.label-path { left: 2px; bottom: 90px; }.label-ai { right: 0; top: 162px; }
.intro-strip { padding: 33px 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); background: var(--surface); }
.intro-grid { display: grid; grid-template-columns: .75fr 1.25fr; align-items: center; gap: 60px; }.intro-grid .section-kicker { margin: 0; }.intro-copy { max-width: 710px; margin: 0; font-size: 19px; line-height: 1.7; }
.section-heading h2, .deep-copy h2, .download-copy h2 { margin: 0; font-size: clamp(34px, 4.1vw, 54px); font-weight: 600; line-height: 1.25; letter-spacing: -.035em; }.split-heading { display: grid; grid-template-columns: 1fr 1fr; align-items: end; gap: 60px; }.split-heading > p { max-width: 430px; margin: 0 0 4px; color: var(--muted); line-height: 1.9; }
.mini-app-header { display: flex; justify-content: space-between; color: var(--gold); font-size: 10px; }.mini-app-header span:last-child { opacity: .7; font-size: 8px; }.mini-app-title { margin-top: 23px; color: var(--cream); font-size: 15px; }.mini-book-filters { display: flex; gap: 8px; align-items: center; margin-top: 14px; color: rgba(245,239,231,.65); font-size: 8px; }.mini-book-filters b { padding: 3px 7px; border-radius: 99px; color: var(--ink); background: var(--gold); font-weight: 600; }.mini-book-row { display: flex; justify-content: space-between; margin-top: 12px; padding: 8px 0; border-bottom: 1px solid rgba(245,239,231,.2); color: var(--cream); font-size: 10px; }.mini-book-row small { color: rgba(245,239,231,.55); font-size: 8px; }.mini-article-tabs { display: flex; gap: 14px; color: var(--muted); font-size: 9px; }.mini-article-tabs b { color: var(--green); font-weight: 600; }.article-visual p { max-width: 300px; margin: 16px 0 10px; font-family: Georgia, serif; font-size: 13px; line-height: 1.5; }.article-visual p.mini-article-title { margin-top: 20px; margin-bottom: -7px; color: var(--ink); font-family: AppSans, sans-serif; font-size: 12px; font-weight: 600; }.article-visual mark { padding: 1px 3px; background: var(--gold); color: var(--ink); }.article-bottom { display: flex; gap: 12px; color: var(--muted); font-size: 9px; }
.tools { background: var(--white); }.centered-heading { max-width: 700px; margin: 0 auto; text-align: center; }.centered-heading > p:last-child { max-width: 570px; margin: 18px auto 0; color: var(--muted); line-height: 1.8; }.feature-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; margin-top: 62px; }.feature-item { padding-top: 23px; border-top: 1px solid var(--ink); }.feature-icon { display: inline-flex; align-items: center; justify-content: center; width: 46px; height: 46px; margin-bottom: 24px; border-radius: 50%; color: var(--ink); background: var(--gold); font-family: Georgia, serif; font-size: 24px; }.icon-clock { font-family: Arial, sans-serif; font-size: 28px; }.icon-ai { font-family: Arial, sans-serif; font-size: 14px; font-weight: 600; }.icon-reading { font-size: 18px; }.feature-item h3 { margin: 0; font-size: 20px; font-weight: 600; }.feature-item p { margin: 12px 0 0; color: var(--muted); font-size: 14px; line-height: 1.8; }
.deep-learning { background: var(--surface); }.deep-grid { display: grid; grid-template-columns: 1.02fr .98fr; align-items: center; gap: 94px; }.deep-visual { position: relative; min-height: 420px; padding: 35px; border-radius: 18px; background: var(--cream); }.lesson-breadcrumb { position: relative; z-index: 1; color: var(--green); font-size: 11px; letter-spacing: .04em; }.lesson-window { position: absolute; right: 35px; bottom: 35px; left: 70px; padding: 30px 30px 35px; border-radius: 12px; background: var(--white); box-shadow: 0 18px 30px rgba(58,48,38,.1); transform: rotate(-4deg); }.lesson-top { display: flex; justify-content: space-between; color: var(--muted); font-size: 11px; }.lesson-title { margin-top: 39px; font-family: Georgia, serif; font-size: 24px; }.lesson-line { width: 85%; height: 7px; margin-top: 17px; border-radius: 4px; background: var(--surface); }.lesson-line.wide { width: 100%; }.lesson-line.medium { width: 67%; }.lesson-line.short { width: 48%; }.lesson-highlight { margin-top: 22px; padding: 10px 12px; border-left: 3px solid var(--green); color: var(--green); background: #edf2eb; font-size: 12px; }.lesson-controls { display: flex; gap: 14px; margin-top: 16px; color: var(--muted); font-size: 10px; }.lesson-controls b { color: var(--green); font-weight: 600; }.deep-copy > p:not(.eyebrow) { max-width: 445px; margin: 24px 0 0; color: var(--muted); line-height: 1.9; }.check-list { display: grid; gap: 15px; margin: 31px 0 0; padding: 0; list-style: none; color: var(--ink); font-size: 14px; }.check-list li { display: flex; align-items: center; gap: 11px; }.check-list span { display: inline-flex; align-items: center; justify-content: center; width: 20px; height: 20px; border-radius: 50%; color: var(--ink); background: var(--gold); font-size: 11px; }
.download { padding-top: 96px; padding-bottom: 96px; }.download-panel { display: grid; grid-template-columns: 1fr 260px; align-items: center; gap: 70px; padding: 67px 80px; border-radius: 20px; color: var(--cream); background: var(--dark); }.download-copy .eyebrow { color: var(--gold); }.download-copy h2 { color: var(--cream); }.download-copy > p:not(.eyebrow):not(.download-note) { max-width: 500px; margin: 23px 0 0; color: rgba(245,239,231,.67); line-height: 1.8; }.download-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 31px; }.store-button { display: inline-flex; align-items: center; gap: 12px; min-width: 160px; padding: 12px 16px; border-radius: 9px; }.store-button small, .store-button strong { display: block; line-height: 1.3; }.store-button small { font-size: 10px; opacity: .66; }.store-button strong { margin-top: 3px; font-size: 14px; font-weight: 600; }.store-button-dark { color: var(--cream); border: 1px solid rgba(245,239,231,.36); }.store-button-gold { color: var(--ink); background: var(--gold); }.store-icon { display: inline-flex; width: 23px; justify-content: center; font-size: 19px; }.download-note { margin: 13px 0 0; color: rgba(245,239,231,.46); font-size: 12px; }.download-qr { justify-self: end; text-align: center; }.qr-placeholder { display: grid; place-content: center; width: 170px; height: 170px; border: 1px dashed rgba(245,239,231,.5); border-radius: 10px; color: var(--cream); }.qr-placeholder span { font-size: 13px; }.qr-placeholder small { margin-top: 5px; color: rgba(245,239,231,.5); font-size: 11px; }.download-qr p { margin: 14px 0 0; color: rgba(245,239,231,.65); font-size: 12px; }
.site-footer { padding: 68px 0 26px; background: var(--cream); }.footer-main { display: flex; justify-content: space-between; gap: 60px; }.footer-brand p { margin: 20px 0 0; color: var(--muted); font-size: 13px; line-height: 1.8; }.footer-links { display: grid; grid-template-columns: repeat(3, minmax(100px, 1fr)); gap: 60px; }.footer-title { margin-bottom: 16px; color: var(--ink); font-size: 12px; }.footer-links a { display: block; margin-top: 9px; color: var(--muted); font-size: 13px; }.footer-bottom { display: flex; justify-content: space-between; gap: 20px; margin-top: 70px; padding-top: 18px; border-top: 1px solid var(--line); color: var(--muted); font-size: 12px; }.footer-bottom div { display: flex; gap: 25px; }

/* ???????????????????? */
.path-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 24px;
    margin-top: 48px;
}
.path-card {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 156px;
    grid-template-rows: auto 1fr;
    align-items: center;
    gap: 16px 24px;
    padding: 32px;
    border-top: 1px solid var(--line);
}
.path-number { grid-column: 1; color: var(--muted); font-size: 12px; }
.path-card-body { grid-column: 1; grid-row: 2; min-width: 0; }
.path-card .card-label { margin-bottom: 12px; color: var(--muted); font-size: 12px; letter-spacing: 0; }
.path-card h3 { margin: 0; font-size: 28px; line-height: 1.3; }
.path-card-body > p:not(.card-label) { margin: 18px 0 24px; color: var(--muted); font-size: 14px; line-height: 1.9; }
.path-visual {
    grid-column: 2;
    grid-row: 1 / 3;
    position: relative;
    width: 156px;
    height: 312px;
    padding: 0;
    align-self: center;
}
.book-visual { background: transparent; }
.article-visual { background: transparent; }
.mini-device-shell { position: relative; width: 100%; height: 100%; overflow: hidden; border: 6px solid var(--ink); border-radius: 22px; background: var(--white); box-shadow: 0 14px 24px rgba(58,48,38,.22); }
.mini-device-shell::before { content: ""; position: absolute; top: 7px; left: 50%; z-index: 4; width: 39px; height: 5px; border-radius: 99px; background: var(--ink); transform: translateX(-50%); opacity: .9; }
.book-visual .mini-device-shell { border-color: #28221c; background: var(--cream); }
.article-visual .mini-device-shell { border-color: #665541; background: var(--white); }
.mini-status { display: flex; justify-content: space-between; height: 27px; padding: 10px 13px 0; color: var(--muted); font-family: Arial, sans-serif; font-size: 8px; }
.mini-app-screen { min-height: 206px; padding: 12px 14px 7px; color: var(--ink); background: var(--white); }
.book-visual .mini-app-screen { background: var(--cream); }
.mini-app-header { color: var(--ink); }
.mini-app-title { margin-top: 20px; color: var(--ink); font-size: 14px; font-weight: 600; }
.mini-book-filters { color: var(--muted); }
.mini-book-row { color: var(--ink); border-color: var(--line); }
.mini-book-row small { color: var(--muted); }
.mini-bottom-nav { position: absolute; right: 0; bottom: 0; left: 0; display: flex; justify-content: space-around; padding: 10px 12px 12px; border-top: 1px solid var(--line); color: var(--muted); background: rgba(255,253,249,.96); font-size: 8px; }
.mini-bottom-nav b { color: var(--green); font-weight: 600; }
.mini-article-top { display: flex; align-items: center; justify-content: space-between; color: var(--ink); font-size: 13px; }.mini-article-top span { color: var(--muted); font-size: 17px; }
.article-visual .mini-app-screen { padding-top: 9px; }.article-visual .mini-article-tabs { margin-top: 14px; padding-bottom: 8px; border-bottom: 1px solid var(--line); }.article-visual .mini-article-title { margin-top: 17px; }.article-visual .article-bottom { color: var(--muted); }

@media (max-width: 900px) { .container { width: min(100% - 40px, 650px); }.site-nav { display: none; }.hero { padding-top: 60px; }.hero-grid, .intro-grid, .split-heading, .deep-grid { grid-template-columns: 1fr; gap: 48px; }.hero-visual { max-width: 560px; width: 100%; margin: 0 auto; }.intro-grid { gap: 16px; }.feature-grid { grid-template-columns: 1fr 1fr; }.download-panel { grid-template-columns: 1fr; gap: 38px; padding: 52px 42px; }.download-qr { justify-self: start; }.footer-main { flex-direction: column; }.footer-links { gap: 30px; } }
@media (max-width: 700px) { .path-grid { grid-template-columns: 1fr; }.path-card { grid-template-columns: 1fr; padding: 24px 0; gap: 16px; }.path-card-body { grid-column: 1; grid-row: 2; max-width: none; }.path-visual { grid-column: 1; grid-row: 3; justify-self: center; width: 136px; height: 248px; margin-top: 12px; } }
@media (max-width: 560px) { .container { width: min(100% - 32px, 450px); }.header-inner { height: 65px; }.brand { font-size: 18px; }.brand-mark { width: 30px; height: 30px; border-radius: 9px; }.brand-mark img { width: 21px; height: 21px; }.header-download { padding: 8px 13px; font-size: 12px; }.hero h1 { font-size: 48px; }.hero-description { font-size: 15px; }.hero-actions { align-items: flex-start; flex-direction: column; gap: 19px; }.hero-proof { margin-top: 42px; }.hero-visual { min-height: 465px; transform: scale(.84); transform-origin: top center; margin-bottom: -65px; }.phone-back { left: 28px; }.phone-front { right: 4px; }.label-path { left: -5px; bottom: 63px; }.label-ai { right: -7px; top: 150px; }.section-padding { padding: 76px 0; }.section-heading h2, .deep-copy h2, .download-copy h2 { font-size: 36px; }.split-heading { gap: 25px; }.path-card { grid-template-columns: 1fr; padding: 24px 0; gap: 16px; }.path-card-body { grid-column: 1; grid-row: 2; }.path-visual { grid-column: 1; grid-row: 3; justify-self: center; margin-top: 12px; }.feature-grid { grid-template-columns: 1fr; gap: 32px; }.deep-visual { min-height: 350px; padding: 24px; }.lesson-window { right: 18px; bottom: 25px; left: 30px; padding: 23px; }.lesson-title { margin-top: 28px; font-size: 20px; }.download-panel { padding: 40px 24px; }.download-actions { flex-direction: column; align-items: stretch; }.store-button { width: 100%; }.footer-links { grid-template-columns: 1fr 1fr; row-gap: 30px; }.footer-links > div:last-child { grid-column: 1 / -1; }.footer-bottom { align-items: flex-start; flex-direction: column; gap: 12px; margin-top: 48px; } }