:root {
    --chestnut: #7b3f2c;
    --chestnut-deep: #51261f;
    --copper: #c86b3c;
    --apricot: #efb36d;
    --cream: #fff8ed;
    --paper: #fffdf9;
    --ink: #2f2521;
    --muted: #756760;
    --line: #eadfd3;
    --sage: #6e806d;
    --shadow: 0 18px 50px rgba(82, 44, 30, .12);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    color: var(--ink);
    background: var(--cream);
    font-family: "Segoe UI", "Microsoft YaHei", sans-serif;
    line-height: 1.75;
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
.container { width: min(1120px, calc(100% - 40px)); margin: 0 auto; }
.site-header {
    position: sticky;
    top: 0;
    z-index: 20;
    background: rgba(255, 248, 237, .94);
    border-bottom: 1px solid rgba(123, 63, 44, .1);
    backdrop-filter: blur(14px);
}
.nav-wrap { min-height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 800; letter-spacing: .04em; color: var(--chestnut-deep); }
.brand img { width: 42px; height: 42px; border-radius: 12px; }
.brand span { font-size: 1.15rem; }
.nav-links { display: flex; align-items: center; gap: 24px; font-size: .94rem; color: var(--muted); }
.nav-links a { padding: 8px 0; border-bottom: 2px solid transparent; }
.nav-links a:hover, .nav-links a[aria-current="page"] { color: var(--chestnut); border-color: var(--copper); }
.nav-download, .button-primary { background: var(--chestnut); color: #fff; border-radius: 999px; padding: 11px 20px; font-weight: 700; border: 0; cursor: pointer; display: inline-flex; align-items: center; justify-content: center; gap: 8px; box-shadow: 0 9px 20px rgba(123, 63, 44, .2); }
.nav-download:hover, .button-primary:hover { background: var(--chestnut-deep); transform: translateY(-1px); }
.menu-toggle { display: none; border: 0; background: transparent; color: var(--chestnut); font-size: 1.5rem; }
.hero { padding: 84px 0 70px; overflow: hidden; }
.hero-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 68px; align-items: center; }
.eyebrow { color: var(--copper); font-weight: 800; letter-spacing: .18em; text-transform: uppercase; font-size: .75rem; }
h1, h2, h3 { line-height: 1.2; letter-spacing: -.02em; }
h1 { font-size: clamp(2.6rem, 6vw, 5.1rem); margin: 15px 0 22px; color: var(--chestnut-deep); }
h2 { font-size: clamp(1.8rem, 3.5vw, 2.8rem); margin: 0 0 14px; color: var(--chestnut-deep); }
h3 { font-size: 1.15rem; margin: 0 0 8px; color: var(--chestnut-deep); }
.hero p { max-width: 650px; font-size: 1.08rem; color: var(--muted); margin: 0 0 28px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 13px; align-items: center; }
.button-secondary { display: inline-flex; align-items: center; gap: 8px; border: 1px solid var(--line); color: var(--chestnut); padding: 10px 18px; border-radius: 999px; background: rgba(255,255,255,.55); font-weight: 700; }
.button-secondary:hover { border-color: var(--copper); background: #fff; }
.hero-note { margin-top: 16px; font-size: .88rem; color: var(--muted); }
.hero-art { position: relative; min-height: 430px; display: grid; place-items: center; }
.hero-art::before { content: ""; position: absolute; width: 390px; height: 390px; border-radius: 50%; background: #f7d7a8; opacity: .68; }
.phone { position: relative; width: min(280px, 72%); padding: 10px; border-radius: 30px; background: #241814; box-shadow: 0 28px 55px rgba(81,38,31,.28); transform: rotate(5deg); }
.phone img { border-radius: 22px; width: 100%; aspect-ratio: 9/16; object-fit: cover; }
.phone::after { content: ""; position: absolute; top: 16px; left: 50%; width: 68px; height: 5px; transform: translateX(-50%); border-radius: 4px; background: #5f4941; }
.float-card { position: absolute; right: 2%; bottom: 24px; padding: 15px 18px; background: var(--paper); border: 1px solid var(--line); border-radius: 16px; box-shadow: var(--shadow); font-size: .86rem; }
.float-card strong { display: block; color: var(--chestnut); font-size: 1.2rem; }
.section { padding: 88px 0; }
.section.alt { background: #fffdf9; border-block: 1px solid var(--line); }
.section-head { display: flex; justify-content: space-between; align-items: end; gap: 24px; margin-bottom: 30px; }
.section-head p { max-width: 560px; color: var(--muted); margin: 0; }
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.feature-card { padding: 26px; background: var(--paper); border: 1px solid var(--line); border-radius: 18px; box-shadow: 0 10px 28px rgba(82,44,30,.05); }
.feature-card .num { display: inline-grid; place-items: center; width: 34px; height: 34px; border-radius: 50%; background: #f6dfc4; color: var(--chestnut); font-weight: 800; margin-bottom: 20px; }
.feature-card p, .content-card p { color: var(--muted); margin: 0; }
.screens { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; align-items: start; }
.screen-card { margin: 0; }
.screen-card img { width: 100%; max-width: 400px; margin: 0 auto; border-radius: 17px; border: 1px solid var(--line); box-shadow: 0 12px 26px rgba(82,44,30,.12); }
.screen-card figcaption { color: var(--muted); font-size: .9rem; margin-top: 10px; }
.path-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.path-card { padding: 26px; border-radius: 18px; background: #f7ead9; border: 1px solid #efd8bd; min-height: 190px; display: flex; flex-direction: column; justify-content: space-between; }
.path-card a { color: var(--chestnut); font-weight: 800; }
.quote-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.quote { padding: 24px; background: var(--paper); border-left: 4px solid var(--copper); border-radius: 0 16px 16px 0; box-shadow: 0 10px 24px rgba(82,44,30,.06); }
.quote p { margin: 0 0 12px; color: var(--ink); }
.quote cite { color: var(--muted); font-size: .88rem; font-style: normal; }
.cta-band { padding: 44px; background: var(--chestnut-deep); color: #fff; border-radius: 24px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.cta-band h2 { color: #fff; margin-bottom: 8px; }
.cta-band p { margin: 0; color: #ead5c8; }
.cta-band .button-primary { background: var(--apricot); color: var(--chestnut-deep); box-shadow: none; }
.page-hero { padding: 66px 0 48px; background: linear-gradient(135deg, #f5dfc3, #fff8ed 60%); border-bottom: 1px solid var(--line); }
.page-hero h1 { font-size: clamp(2.4rem, 5vw, 4.2rem); max-width: 760px; margin-bottom: 14px; }
.page-hero p { max-width: 740px; margin: 0; color: var(--muted); font-size: 1.05rem; }
.article-layout { display: grid; grid-template-columns: minmax(0, 1fr) 280px; gap: 46px; align-items: start; }
.article { max-width: 780px; }
.article h2 { margin-top: 42px; font-size: 1.85rem; }
.article h3 { margin-top: 26px; }
.article p { color: #554840; }
.article ul, .article ol { color: #554840; padding-left: 22px; }
.article li { margin: 8px 0; }
.aside { position: sticky; top: 104px; padding: 22px; background: var(--paper); border: 1px solid var(--line); border-radius: 18px; }
.aside strong { display: block; color: var(--chestnut); margin-bottom: 10px; }
.aside a { display: block; padding: 7px 0; color: var(--muted); font-size: .92rem; }
.aside a:hover { color: var(--chestnut); }
.steps { counter-reset: step; display: grid; gap: 16px; margin: 24px 0; }
.step { counter-increment: step; display: grid; grid-template-columns: 44px 1fr; gap: 16px; align-items: start; padding: 18px; background: #fffaf2; border: 1px solid var(--line); border-radius: 16px; }
.step::before { content: counter(step, decimal-leading-zero); display: grid; place-items: center; width: 44px; height: 44px; background: var(--chestnut); color: #fff; border-radius: 12px; font-weight: 800; }
.step h3 { margin: 0 0 4px; }
.step p { margin: 0; }
.faq-list { display: grid; gap: 12px; }
.faq-item { background: var(--paper); border: 1px solid var(--line); border-radius: 14px; overflow: hidden; }
.faq-question { width: 100%; display: flex; justify-content: space-between; align-items: center; border: 0; background: transparent; text-align: left; cursor: pointer; padding: 18px 20px; color: var(--chestnut-deep); font-weight: 800; font-size: 1rem; }
.faq-question span:last-child { color: var(--copper); font-size: 1.3rem; }
.faq-answer { display: none; padding: 0 20px 18px; color: var(--muted); }
.faq-item.open .faq-answer { display: block; }
.faq-item.open .faq-question span:last-child { transform: rotate(45deg); }
.site-footer { padding: 44px 0 30px; background: #2e211c; color: #eadbd0; }
.footer-grid { display: grid; grid-template-columns: 1.3fr 1fr 1fr; gap: 36px; padding-bottom: 28px; border-bottom: 1px solid rgba(255,255,255,.14); }
.footer-grid h3 { color: #fff; font-size: 1rem; }
.footer-grid p, .footer-grid a { color: #cdb9ac; font-size: .9rem; }
.footer-links { display: grid; gap: 6px; }
.disclaimer { margin: 22px 0 0; color: #baa59a; font-size: .82rem; }
.copyright { margin: 14px 0 0; color: #927f75; font-size: .8rem; }
.reveal { opacity: 1; transform: none; transition: .55s ease; }
.reveal.visible { opacity: 1; transform: none; }
@media (max-width: 840px) {
    .nav-links { display: none; position: absolute; top: 76px; left: 0; right: 0; padding: 18px 20px 24px; background: var(--cream); border-bottom: 1px solid var(--line); flex-direction: column; align-items: flex-start; gap: 10px; }
    .nav-links.open { display: flex; }
    .menu-toggle { display: block; }
    .nav-download { display: none; }
    .hero-grid, .article-layout { grid-template-columns: 1fr; }
    .hero { padding-top: 55px; }
    .hero-art { min-height: 360px; }
    .aside { position: static; order: -1; }
    .feature-grid, .path-grid, .quote-grid { grid-template-columns: 1fr 1fr; }
    .screens { grid-template-columns: repeat(2, 1fr); }
    .cta-band { align-items: flex-start; flex-direction: column; }
}
@media (max-width: 560px) {
    .container { width: min(100% - 28px, 1120px); }
    .nav-wrap { min-height: 68px; }
    .nav-links { top: 68px; }
    .hero { padding: 46px 0 30px; }
    h1 { font-size: 2.8rem; }
    .section { padding: 62px 0; }
    .section-head { display: block; }
    .section-head p { margin-top: 10px; }
    .feature-grid, .path-grid, .quote-grid, .screens, .footer-grid { grid-template-columns: 1fr; }
    .hero-art { min-height: 320px; }
    .hero-art::before { width: 300px; height: 300px; }
    .phone { width: 230px; }
    .float-card { right: 0; bottom: 8px; }
    .cta-band { padding: 30px 24px; }
}