:root {
    --ink: #1d2433;
    --muted: #6d7483;
    --paper: #fffaf4;
    --card: #ffffff;
    --orange: #ff7048;
    --yellow: #ffc857;
    --indigo: #4546a8;
    --mint: #b9ead7;
    --line: #eadfd4;
    --shadow: 0 18px 45px rgba(61, 45, 36, .11);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    color: var(--ink);
    background: var(--paper);
    font-family: "Microsoft YaHei", "Noto Sans SC", Arial, sans-serif;
    line-height: 1.75;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; display: block; }
.site-header {
    position: sticky;
    top: 0;
    z-index: 20;
    background: rgba(255, 250, 244, .95);
    border-bottom: 1px solid var(--line);
    backdrop-filter: blur(14px);
}
.nav-wrap {
    max-width: 1180px;
    margin: 0 auto;
    min-height: 76px;
    padding: 0 22px;
    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; }
.brand img { width: 42px; height: 42px; border-radius: 12px; }
.brand-name { font-size: 20px; }
.nav-links { display: flex; align-items: center; gap: 22px; color: var(--muted); font-size: 14px; }
.nav-links a { padding: 8px 0; border-bottom: 2px solid transparent; }
.nav-links a:hover, .nav-links a.active { color: var(--orange); border-color: var(--orange); }
.nav-download { background: var(--orange); color: #fff; padding: 10px 16px !important; border-radius: 10px; border: 0 !important; font-weight: 700; }
.nav-download:hover { color: #fff !important; transform: translateY(-1px); }
.hero {
    max-width: 1180px;
    margin: 0 auto;
    padding: 76px 22px 64px;
    display: grid;
    grid-template-columns: 1.05fr .95fr;
    gap: 54px;
    align-items: center;
}
.eyebrow { display: inline-flex; align-items: center; gap: 8px; color: var(--indigo); font-size: 13px; font-weight: 800; letter-spacing: .14em; text-transform: uppercase; }
.eyebrow::before { content: ""; width: 24px; height: 3px; background: var(--yellow); border-radius: 3px; }
h1, h2, h3 { margin: 0 0 16px; line-height: 1.25; letter-spacing: -.02em; }
h1 { font-size: clamp(38px, 6vw, 68px); max-width: 680px; }
h2 { font-size: clamp(28px, 4vw, 42px); }
h3 { font-size: 20px; }
.hero-copy { color: var(--muted); max-width: 600px; font-size: 17px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin: 28px 0 20px; }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 13px 22px; border-radius: 11px; border: 1px solid transparent; font-weight: 800; transition: .2s ease; }
.btn-primary { background: var(--orange); color: #fff; box-shadow: 0 10px 24px rgba(255,112,72,.24); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 14px 28px rgba(255,112,72,.3); }
.btn-ghost { color: var(--indigo); border-color: #cbcce8; background: #fff; }
.btn-ghost:hover { border-color: var(--indigo); }
.hero-note { color: var(--muted); font-size: 13px; }
.hero-art { position: relative; min-height: 440px; display: grid; place-items: center; }
.hero-art::before { content: ""; position: absolute; width: 330px; height: 330px; background: var(--yellow); border-radius: 50% 45% 52% 48%; right: 11%; top: 8%; opacity: .58; transform: rotate(15deg); }
.phone-frame { position: relative; z-index: 1; width: min(300px, 80vw); border: 11px solid #222740; border-radius: 34px; box-shadow: var(--shadow); overflow: hidden; background: #fff; transform: rotate(3deg); }
.phone-frame img { width: 100%; }
.section { padding: 86px 22px; }
.section.alt { background: #f4f0ff; }
.section-inner { max-width: 1180px; margin: 0 auto; }
.section-head { display: flex; align-items: end; justify-content: space-between; gap: 24px; margin-bottom: 32px; }
.section-head p { margin: 0; max-width: 500px; color: var(--muted); }
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.feature-card { background: var(--card); border: 1px solid var(--line); padding: 26px; border-radius: 16px; min-height: 210px; }
.feature-card:nth-child(2) { border-top: 4px solid var(--indigo); }
.feature-card:nth-child(3) { border-top: 4px solid var(--yellow); }
.feature-card:nth-child(1) { border-top: 4px solid var(--orange); }
.feature-card p { color: var(--muted); margin: 0; }
.feature-index { display: inline-block; color: var(--orange); font-weight: 900; font-size: 13px; margin-bottom: 14px; }
.gallery { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; align-items: start; }
.shot { background: #fff; border: 1px solid var(--line); padding: 14px; border-radius: 16px; }
.shot img { width: 100%; max-width: 400px; margin: 0 auto; border-radius: 10px; }
.shot figcaption { font-size: 14px; color: var(--muted); padding: 14px 4px 2px; }
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin-top: 30px; }
.stat { padding: 18px; background: #fff; border: 1px solid var(--line); border-radius: 14px; }
.stat strong { display: block; color: var(--indigo); font-size: 27px; line-height: 1.2; }
.stat span { color: var(--muted); font-size: 13px; }
.quote-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.quote { margin: 0; padding: 24px; background: #fff; border-left: 4px solid var(--orange); border-radius: 0 14px 14px 0; color: var(--ink); }
.quote p { margin: 0 0 14px; font-size: 16px; }
.quote cite { color: var(--muted); font-size: 13px; font-style: normal; }
.link-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.link-card { display: flex; justify-content: space-between; align-items: center; gap: 20px; padding: 24px; background: var(--indigo); color: #fff; border-radius: 16px; }
.link-card:nth-child(2) { background: var(--orange); }
.link-card p { margin: 4px 0 0; color: rgba(255,255,255,.82); font-size: 14px; }
.arrow { font-size: 26px; }
.page-hero { padding: 72px 22px 54px; background: #f4f0ff; border-bottom: 1px solid var(--line); }
.page-hero-inner { max-width: 1180px; margin: 0 auto; }
.page-hero h1 { font-size: clamp(36px, 5vw, 58px); max-width: 740px; }
.page-hero p { max-width: 720px; color: var(--muted); font-size: 17px; }
.content-layout { max-width: 1180px; margin: 0 auto; padding: 64px 22px 90px; display: grid; grid-template-columns: minmax(0, 1fr) 290px; gap: 44px; }
.content-main > p { color: #3f4551; }
.content-main h2 { font-size: 30px; margin-top: 42px; }
.content-main h3 { margin-top: 26px; }
.toc { position: sticky; top: 102px; align-self: start; background: #fff; border: 1px solid var(--line); border-radius: 14px; padding: 20px; }
.toc strong { display: block; margin-bottom: 10px; }
.toc a { display: block; color: var(--muted); padding: 6px 0; font-size: 14px; }
.toc a:hover { color: var(--orange); }
.step-list { counter-reset: step; display: grid; gap: 14px; padding: 0; list-style: none; }
.step-list li { counter-increment: step; position: relative; padding: 20px 20px 20px 68px; background: #fff; border: 1px solid var(--line); border-radius: 14px; }
.step-list li::before { content: counter(step, decimal-leading-zero); position: absolute; left: 20px; top: 20px; color: var(--orange); font-weight: 900; font-size: 20px; }
.step-list strong { display: block; margin-bottom: 4px; }
.tip { margin: 26px 0; padding: 20px 22px; background: #fff5d9; border-left: 4px solid var(--yellow); border-radius: 0 12px 12px 0; }
.faq-list { display: grid; gap: 12px; }
details { background: #fff; border: 1px solid var(--line); border-radius: 12px; padding: 0 18px; }
summary { cursor: pointer; padding: 18px 0; font-weight: 800; list-style: none; }
summary::-webkit-details-marker { display: none; }
summary::after { content: "+"; float: right; color: var(--orange); font-size: 22px; line-height: 1; }
details[open] summary::after { content: "−"; }
details p { color: var(--muted); padding: 0 0 18px; margin: 0; }
.footer { background: #232842; color: #e8e9f2; padding: 42px 22px 30px; }
.footer-inner { max-width: 1180px; margin: 0 auto; display: grid; grid-template-columns: 1.3fr 1fr 1fr; gap: 34px; }
.footer h3 { color: #fff; font-size: 18px; }
.footer p, .footer a { color: #bfc3d6; font-size: 13px; }
.footer a:hover { color: #fff; }
.footer-links { display: grid; gap: 7px; }
.disclaimer { border-top: 1px solid rgba(255,255,255,.14); margin-top: 28px; padding-top: 18px; color: #aeb3c5; font-size: 12px; width: 1120px; margin: 0 auto;}
.copyright { max-width: 1180px; margin: 20px auto 0; color: #8f95ac; font-size: 12px; }
@media (max-width: 850px) {
    .nav-wrap { min-height: 68px; }
    .nav-links { gap: 12px; font-size: 13px; }
    .nav-download { padding: 8px 10px !important; }
    .hero { grid-template-columns: 1fr; padding-top: 54px; }
    .hero-art { min-height: 360px; }
    .feature-grid, .gallery, .quote-grid { grid-template-columns: 1fr 1fr; }
    .stats { grid-template-columns: 1fr 1fr; }
    .content-layout { grid-template-columns: 1fr; }
    .toc { position: static; order: -1; }
    .footer-inner { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 560px) {
    .brand-name { font-size: 18px; }
    .nav-links { gap: 9px; }
    .nav-links a:not(.nav-download) { display: none; }
    .hero { padding-bottom: 42px; }
    h1 { font-size: 43px; }
    .section { padding: 62px 18px; }
    .section-head { display: block; }
    .section-head p { margin-top: 10px; }
    .feature-grid, .gallery, .quote-grid, .link-grid { grid-template-columns: 1fr; }
    .footer-inner { grid-template-columns: 1fr; }
}