:root {
  --ink: #101025;
  --paper: #f6f7fb;
  --panel: #ffffff;
  --cyan: #40d9f6;
  --blue: #3f6cff;
  --pink: #ff5ab7;
  --yellow: #ffd166;
  --muted: #62677e;
  --line: #dfe2ee;
  --shadow: 0 18px 46px rgba(16, 16, 37, .12);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--paper); color: var(--ink); font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif; line-height: 1.75; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; display: block; }
.site-header { background: var(--ink); color: #fff; position: sticky; top: 0; z-index: 10; border-bottom: 1px solid rgba(255,255,255,.12); }
.nav-wrap { max-width: 1160px; margin: auto; min-height: 72px; display: flex; align-items: center; justify-content: space-between; gap: 24px; padding: 0 24px; }
.brand { display: flex; align-items: center; gap: 11px; font-weight: 800; letter-spacing: .04em; font-size: 1.08rem; }
.brand img { width: 38px; height: 38px; }
.nav-links { display: flex; align-items: center; gap: 26px; font-size: .95rem; }
.nav-links a { color: #dfe5ff; }
.nav-links a:hover, .nav-links a[aria-current="page"] { color: var(--cyan); }
.nav-download { background: var(--pink); color: #fff !important; padding: 8px 17px; border-radius: 6px; font-weight: 700; }
.menu-toggle { display: none; border: 1px solid #5e6280; background: transparent; color: #fff; border-radius: 6px; padding: 7px 10px; font-size: 1.1rem; }
.hero { background: var(--ink); color: #fff; overflow: hidden; }
.hero-inner { max-width: 1160px; margin: auto; padding: 78px 24px 88px; display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(300px, .85fr); gap: 70px; align-items: center; }
.eyebrow { color: var(--cyan); font-size: .78rem; letter-spacing: .18em; text-transform: uppercase; font-weight: 800; }
h1 { font-size: clamp(2rem, 4.3vw, 4.25rem); line-height: 1.1; margin: 15px 0 20px; letter-spacing: -.03em; }
.hero-copy { color: #c6c9db; max-width: 620px; font-size: 1.07rem; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin: 28px 0 24px; }
.btn { display: inline-flex; align-items: center; justify-content: center; min-height: 48px; padding: 0 22px; border-radius: 6px; border: 1px solid transparent; font-weight: 800; transition: transform .2s, box-shadow .2s; }
.btn:hover { transform: translateY(-2px); box-shadow: 0 10px 24px rgba(0,0,0,.2); }
.btn-primary { background: var(--cyan); color: var(--ink); }
.btn-outline { border-color: #6e769b; color: #fff; }
.hero-meta { display: flex; flex-wrap: wrap; gap: 18px; color: #a5abc9; font-size: .9rem; }
.hero-meta strong { color: #fff; display: block; font-size: 1.08rem; }
.hero-art { position: relative; min-height: 380px; display: grid; place-items: center; }
.hero-art:before, .hero-art:after { content: ""; position: absolute; border: 1px solid rgba(64,217,246,.42); width: 270px; height: 270px; transform: rotate(14deg); }
.hero-art:after { width: 208px; height: 208px; transform: rotate(-16deg); border-color: rgba(255,90,183,.5); }
.phone { width: 246px; background: #161735; border: 7px solid #252850; border-radius: 25px; padding: 14px 12px 16px; position: relative; z-index: 1; box-shadow: 0 24px 55px rgba(0,0,0,.32); }
.phone-notch { width: 74px; height: 17px; background: #252850; border-radius: 0 0 12px 12px; margin: -14px auto 10px; }
.phone-screen { border-radius: 15px; overflow: hidden; background: #f6f7fb; color: var(--ink); min-height: 320px; }
.screen-top { background: var(--blue); color: #fff; padding: 14px 13px 18px; }
.screen-top small { opacity: .8; }
.screen-title { font-size: 1.25rem; font-weight: 800; margin-top: 10px; }
.screen-tabs { display: flex; gap: 6px; margin-top: 12px; }
.screen-tabs span { background: rgba(255,255,255,.18); border-radius: 5px; padding: 3px 7px; font-size: .68rem; }
.screen-list { padding: 12px; display: grid; gap: 8px; }
.screen-card { background: #fff; padding: 10px; border: 1px solid var(--line); border-radius: 6px; display: flex; gap: 9px; align-items: center; }
.screen-cover { width: 35px; height: 47px; background: var(--pink); border-radius: 4px; flex: 0 0 auto; }
.screen-cover.blue { background: var(--cyan); }
.screen-cover.yellow { background: var(--yellow); }
.screen-card b { font-size: .78rem; }
.screen-card small { display: block; color: var(--muted); font-size: .65rem; }
.section { max-width: 1160px; margin: auto; padding: 78px 24px; }
.section-heading { display: flex; align-items: end; justify-content: space-between; gap: 20px; margin-bottom: 30px; }
.section-heading h2 { margin: 0; font-size: clamp(1.7rem, 3vw, 2.5rem); line-height: 1.2; }
.section-heading p { margin: 0; color: var(--muted); max-width: 480px; }
.kicker { color: var(--blue); font-size: .78rem; font-weight: 800; letter-spacing: .16em; text-transform: uppercase; margin-bottom: 8px; }
.feature-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.feature-card { background: var(--panel); border: 1px solid var(--line); border-radius: 8px; padding: 22px; min-height: 190px; box-shadow: 0 8px 24px rgba(16,16,37,.04); }
.feature-icon { width: 38px; height: 38px; border-radius: 6px; display: grid; place-items: center; font-weight: 900; margin-bottom: 16px; color: var(--ink); background: var(--cyan); }
.feature-card:nth-child(2) .feature-icon { background: var(--pink); }
.feature-card:nth-child(3) .feature-icon { background: var(--yellow); }
.feature-card:nth-child(4) .feature-icon { background: #b9a4ff; }
.feature-card h3 { margin: 0 0 8px; font-size: 1.12rem; }
.feature-card p { margin: 0; color: var(--muted); font-size: .93rem; }
.showcase { background: #e9ebf5; }
.screen-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; align-items: start; }
.shot-card { background: var(--panel); border: 1px solid var(--line); padding: 16px; border-radius: 8px; }
.shot-card img { width: 100%; max-width: 400px; margin: auto; border-radius: 6px; }
.shot-card h3 { margin: 16px 0 6px; font-size: 1.08rem; }
.shot-card p { margin: 0; color: var(--muted); font-size: .92rem; }
.path-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.path-card { background: var(--ink); color: #fff; border-radius: 8px; padding: 24px; min-height: 176px; display: flex; flex-direction: column; justify-content: space-between; }
.path-card:nth-child(2) { background: var(--blue); }
.path-card:nth-child(3) { background: var(--pink); }
.path-card h3 { margin: 0; font-size: 1.25rem; }
.path-card p { color: rgba(255,255,255,.8); margin: 9px 0 18px; font-size: .92rem; }
.path-link { color: #fff; font-weight: 800; font-size: .9rem; }
.quote-band { background: var(--yellow); }
.quote-grid { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 18px; }
blockquote { margin: 0; background: #fff; border-radius: 8px; padding: 22px; font-size: 1rem; }
blockquote p { margin: 0 0 14px; }
blockquote cite { color: var(--muted); font-size: .86rem; font-style: normal; }
.article { max-width: 820px; margin: auto; padding: 74px 24px 96px; }
.article h1 { font-size: clamp(2rem, 4vw, 3.35rem); margin-bottom: 16px; }
.article-lead { color: var(--muted); font-size: 1.06rem; margin: 0 0 34px; }
.article h2 { margin-top: 44px; font-size: 1.6rem; line-height: 1.3; }
.article h3 { margin-top: 28px; font-size: 1.15rem; }
.article p { color: #353a50; }
.article ul, .article ol { padding-left: 1.25rem; color: #353a50; }
.article li { margin: 8px 0; }
.step-list { display: grid; gap: 12px; margin: 22px 0; }
.step-item { display: grid; grid-template-columns: 40px 1fr; gap: 14px; padding: 16px; background: #fff; border: 1px solid var(--line); border-radius: 8px; }
.step-no { width: 32px; height: 32px; border-radius: 50%; background: var(--blue); color: #fff; display: grid; place-items: center; font-weight: 800; }
.step-item h3 { margin: 0 0 4px; }
.step-item p { margin: 0; font-size: .94rem; }
.note { border-left: 4px solid var(--pink); background: #fff1f8; padding: 15px 18px; margin: 24px 0; color: #463245; }
.faq-list { display: grid; gap: 12px; margin-top: 28px; }
.faq-item { border: 1px solid var(--line); background: #fff; border-radius: 8px; overflow: hidden; }
.faq-q { width: 100%; border: 0; background: #fff; color: var(--ink); text-align: left; padding: 17px 19px; font: inherit; font-weight: 800; cursor: pointer; display: flex; justify-content: space-between; gap: 10px; }
.faq-q span { color: var(--blue); }
.faq-a { display: none; padding: 0 19px 17px; color: var(--muted); }
.faq-item.open .faq-a { display: block; }
.data-strip { background: var(--ink); color: #fff; }
.data-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.data-grid strong { font-size: 2rem; display: block; color: var(--cyan); }
.data-grid span { color: #bec4dd; font-size: .9rem; }
.site-footer { background: #0b0b19; color: #c4c9df; padding: 40px 24px; }
.footer-inner { max-width: 1160px; margin: auto; display: grid; grid-template-columns: 1.3fr 1fr 1fr; gap: 30px; }
.footer-inner h3 { color: #fff; margin-top: 0; font-size: 1rem; }
.footer-inner p, .footer-inner a { color: #9ca3c2; font-size: .88rem; }
.footer-links { display: grid; gap: 7px; }
.copyright { max-width: 1160px; margin: 28px auto 0; border-top: 1px solid rgba(255,255,255,.12); padding-top: 18px; font-size: .8rem; color: #7e85a7; }
@media (max-width: 900px) {
  .hero-inner { grid-template-columns: 1fr; gap: 30px; padding-top: 58px; }
  .hero-art { min-height: 330px; }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .screen-grid, .path-grid { grid-template-columns: 1fr 1fr; }
  .quote-grid { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
  .nav-wrap { min-height: 64px; }
  .menu-toggle { display: block; }
  .nav-links { display: none; position: absolute; top: 64px; left: 0; right: 0; background: var(--ink); padding: 12px 24px 18px; flex-direction: column; align-items: flex-start; gap: 14px; border-top: 1px solid rgba(255,255,255,.12); }
  .nav-links.open { display: flex; }
  .nav-download { padding: 7px 12px; }
  h1 { font-size: 2.35rem; }
  .hero-inner { padding-left: 20px; padding-right: 20px; }
  .section { padding: 58px 20px; }
  .section-heading { display: block; }
  .section-heading p { margin-top: 12px; }
  .feature-grid, .screen-grid, .path-grid, .data-grid, .footer-inner { grid-template-columns: 1fr; }
  .article { padding: 54px 20px 74px; }
  .hero-art { transform: scale(.9); margin: -12px 0; }
}