:root {
  --green: #00a884;
  --green-dark: #087b65;
  --mint: #dff8ef;
  --coral: #ff6b57;
  --yellow: #ffd166;
  --ink: #17212b;
  --muted: #637169;
  --line: #dce8e2;
  --paper: #f5faf7;
  --white: #ffffff;
  --shadow: 0 18px 45px rgba(29, 69, 55, 0.09);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--white);
  font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
  line-height: 1.75;
  letter-spacing: 0;
}
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button, a { -webkit-tap-highlight-color: transparent; }
.wrap { width: min(1120px, calc(100% - 40px)); margin: 0 auto; }
.skip-link { position: fixed; left: 12px; top: -50px; z-index: 100; background: var(--ink); color: #fff; padding: 8px 12px; }
.skip-link:focus { top: 12px; }

.site-header { position: sticky; top: 0; z-index: 50; background: rgba(255,255,255,.95); border-bottom: 1px solid var(--line); backdrop-filter: blur(12px); }
.header-inner { min-height: 72px; display: flex; align-items: center; gap: 28px; }
.brand { display: inline-flex; align-items: center; gap: 10px; flex: 0 0 auto; }
.brand img { width: 42px; height: 42px; border-radius: 10px; }
.brand strong { font-size: 20px; letter-spacing: 0; }
.nav { margin-left: auto; display: flex; align-items: center; gap: 7px; }
.nav a { padding: 9px 11px; border-radius: 6px; color: #45534c; font-size: 14px; font-weight: 700; }
.nav a:hover, .nav a[aria-current="page"] { color: var(--green-dark); background: var(--mint); }
.nav .download { color: #fff; background: var(--green); padding-inline: 18px; }
.nav .download:hover { color: #fff; background: var(--green-dark); }
.menu-button { display: none; margin-left: auto; width: 42px; height: 42px; border: 1px solid var(--line); background: #fff; border-radius: 6px; font-size: 22px; cursor: pointer; }

.hero { position: relative; overflow: hidden; background: var(--paper); border-bottom: 1px solid var(--line); }
.hero::before { content: ""; position: absolute; inset: 0; opacity: .48; background-image: linear-gradient(#dbe9e2 1px, transparent 1px), linear-gradient(90deg, #dbe9e2 1px, transparent 1px); background-size: 32px 32px; mask-image: linear-gradient(to right, #000, transparent 62%); }
.hero-grid { position: relative; min-height: 620px; display: grid; grid-template-columns: 1.05fr .95fr; align-items: center; gap: 50px; padding-block: 72px; }
.kicker { display: inline-flex; align-items: center; gap: 8px; margin-bottom: 18px; color: var(--green-dark); font-size: 14px; font-weight: 800; }
.kicker::before { content: ""; width: 26px; height: 3px; background: var(--coral); }
.hero h1 { margin: 0; max-width: 650px; font-size: clamp(38px, 5vw, 68px); line-height: 1.08; letter-spacing: 0; }
.hero-copy { max-width: 650px; margin: 22px 0 0; color: #4e5d55; font-size: 17px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }
.btn { min-height: 48px; display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 10px 22px; border: 0; border-radius: 6px; background: var(--green); color: #fff; font-size: 15px; font-weight: 800; box-shadow: 0 10px 24px rgba(0,168,132,.19); }
.btn:hover { background: var(--green-dark); transform: translateY(-1px); }
.btn.secondary { color: var(--ink); background: #fff; border: 1px solid var(--line); box-shadow: none; }
.trust-row { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 25px; }
.trust-row span { padding: 5px 10px; border: 1px solid #cfe3da; background: rgba(255,255,255,.78); border-radius: 4px; color: #526259; font-size: 13px; }
.hero-visual { position: relative; min-height: 460px; display: grid; place-items: center; }
.phone { width: min(305px, 72vw); padding: 11px; background: #17212b; border-radius: 28px; box-shadow: 0 32px 70px rgba(23,33,43,.22); transform: rotate(2deg); }
.phone img { width: 100%; max-width: 400px; height: auto; border-radius: 20px; }
.note-card { position: absolute; right: 0; bottom: 48px; width: 205px; padding: 16px; background: #fff; border: 1px solid var(--line); border-left: 4px solid var(--coral); box-shadow: var(--shadow); border-radius: 6px; }
.note-card b { display: block; font-size: 15px; }
.note-card span { color: var(--muted); font-size: 13px; }

.section { padding: 76px 0; }
.section.alt { background: var(--paper); border-block: 1px solid var(--line); }
.section-head { display: flex; align-items: end; justify-content: space-between; gap: 30px; margin-bottom: 34px; }
.section-head h2 { margin: 0; max-width: 720px; font-size: 30px; line-height: 1.25; }
.section-head .index { color: var(--green); font-size: 13px; font-weight: 900; }
.section-head .index::before { content: ""; display: inline-block; width: 35px; height: 2px; margin-right: 9px; vertical-align: middle; background: var(--coral); }
.section-head .hint { max-width: 390px; color: var(--muted); font-size: 14px; }
.grid { display: grid; gap: 18px; }
.grid.three { grid-template-columns: repeat(3, 1fr); }
.grid.four { grid-template-columns: repeat(4, 1fr); }
.card { min-width: 0; padding: 24px; border: 1px solid var(--line); background: #fff; border-radius: 7px; box-shadow: 0 5px 18px rgba(29,69,55,.04); }
.card .num { display: inline-grid; place-items: center; width: 34px; height: 34px; margin-bottom: 18px; color: #fff; background: var(--green); border-radius: 5px; font-size: 13px; font-weight: 900; }
.card:nth-child(2n) .num { background: var(--coral); }
.card h3 { margin: 0 0 10px; font-size: 18px; line-height: 1.4; }
.card p { margin: 0; color: var(--muted); font-size: 14px; }
.card p + p { margin-top: 10px; }
.log-list { display: grid; grid-template-columns: 160px 1fr; border-top: 1px solid var(--line); }
.log-list dt, .log-list dd { margin: 0; padding: 17px 0; border-bottom: 1px solid var(--line); }
.log-list dt { color: var(--green-dark); font-weight: 800; }
.log-list dd { color: #506058; }
.shots { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.shot { margin: 0; padding: 10px; background: #fff; border: 1px solid var(--line); border-radius: 7px; overflow: hidden; }
.shot img { width: 100%; max-width: 400px; height: auto; border-radius: 4px; }
.shot figcaption { padding: 12px 4px 4px; color: var(--muted); font-size: 13px; }
.shot figcaption b { display: block; color: var(--ink); font-size: 15px; }
.split { display: grid; grid-template-columns: .85fr 1.15fr; gap: 52px; align-items: center; }
.split.reverse { grid-template-columns: 1.15fr .85fr; }
.split-copy h2 { margin: 0 0 22px; font-size: 30px; line-height: 1.3; }
.split-copy p { color: #506058; }
.check-list { list-style: none; padding: 0; margin: 22px 0 0; }
.check-list li { position: relative; padding: 11px 0 11px 30px; border-bottom: 1px solid var(--line); }
.check-list li::before { content: "✓"; position: absolute; left: 0; color: var(--green); font-weight: 900; }
.reader-panel { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; padding: 24px; background: var(--ink); border-radius: 7px; color: #fff; }
.reader-panel div { padding: 18px; border: 1px solid rgba(255,255,255,.15); border-radius: 5px; }
.reader-panel b { display: block; color: var(--yellow); }
.reader-panel span { color: #ccd7d1; font-size: 13px; }
.storage { display: grid; gap: 15px; }
.storage-line { padding: 18px; border: 1px solid var(--line); background: #fff; border-radius: 6px; }
.storage-line header { display: flex; justify-content: space-between; gap: 15px; margin-bottom: 10px; font-weight: 800; }
.bar { height: 9px; background: #e4eee9; border-radius: 4px; overflow: hidden; }
.bar i { display: block; height: 100%; background: var(--green); }
.storage-line:nth-child(2) .bar i { background: var(--coral); }
.reviews { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.review { padding: 25px; border: 1px solid var(--line); background: #fff; border-radius: 7px; }
.stars { color: #e5a700; letter-spacing: 2px; }
.review blockquote { margin: 15px 0; color: #45534c; }
.review cite { color: var(--muted); font-size: 13px; font-style: normal; }
.cta-band { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 30px; padding: 34px; color: #fff; background: var(--ink); border-left: 6px solid var(--coral); border-radius: 7px; }
.cta-band h2 { margin: 0 0 5px; font-size: 26px; }
.cta-band p { margin: 0; color: #c6d3cc; }

.page-hero { background: var(--paper); border-bottom: 1px solid var(--line); }
.page-hero .wrap { padding-block: 56px; }
.crumb { color: var(--green-dark); font-size: 13px; font-weight: 700; }
.page-hero h1 { margin: 14px 0 12px; max-width: 850px; font-size: 42px; line-height: 1.2; }
.page-lead { max-width: 830px; margin: 0; color: #526259; font-size: 16px; }
.prose { width: min(900px, calc(100% - 40px)); margin: 0 auto; padding: 60px 0 20px; }
.prose section { scroll-margin-top: 95px; padding: 0 0 54px; }
.prose h2 { margin: 0 0 20px; padding-top: 4px; font-size: 27px; line-height: 1.35; }
.prose h3 { margin: 28px 0 10px; font-size: 19px; }
.prose p { margin: 0 0 15px; color: #45534c; }
.prose ul, .prose ol { margin: 15px 0; padding-left: 24px; color: #45534c; }
.prose li { margin: 8px 0; }
.prose a { color: var(--green-dark); border-bottom: 1px solid #a9d8cb; }
.step-list { list-style: none; padding: 0 !important; counter-reset: steps; }
.step-list li { counter-increment: steps; position: relative; min-height: 56px; padding: 0 0 24px 58px; border-left: 2px solid var(--line); margin-left: 19px; }
.step-list li::before { content: counter(steps); position: absolute; left: -20px; top: 0; width: 38px; height: 38px; display: grid; place-items: center; color: #fff; background: var(--green); border-radius: 5px; font-weight: 900; }
.tip { margin: 22px 0; padding: 18px 20px; border-left: 4px solid var(--coral); background: #fff5f2; color: #6e443c; }
.data-table { width: 100%; border-collapse: collapse; margin: 20px 0; }
.data-table th, .data-table td { padding: 13px; border: 1px solid var(--line); text-align: left; vertical-align: top; }
.data-table th { background: var(--paper); }
.faq details { border-top: 1px solid var(--line); }
.faq details:last-child { border-bottom: 1px solid var(--line); }
.faq summary { cursor: pointer; padding: 17px 42px 17px 0; font-weight: 800; list-style: none; position: relative; }
.faq summary::after { content: "+"; position: absolute; right: 8px; color: var(--green); font-size: 22px; }
.faq details[open] summary::after { content: "−"; }
.faq .answer { padding: 0 30px 15px 0; color: #526259; }
.related { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 30px; }
.related a { padding: 7px 12px; background: var(--mint); border: 0; border-radius: 4px; font-size: 13px; font-weight: 700; }

.site-footer { margin-top: 70px; color: #b9c7bf; background: #111b20; }
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr; gap: 40px; padding-block: 48px 34px; }
.footer-brand { display: flex; align-items: center; gap: 10px; color: #fff; font-size: 19px; }
.footer-brand img { width: 40px; height: 40px; border-radius: 9px; }
.footer-grid p { max-width: 520px; font-size: 13px; }
.footer-grid h2 { margin: 0 0 12px; color: #fff; font-size: 15px; }
.footer-grid ul { list-style: none; padding: 0; margin: 0; }
.footer-grid li { margin: 7px 0; font-size: 13px; }
.footer-grid a:hover { color: #fff; }
.footer-bottom { padding: 18px 0 24px; border-top: 1px solid rgba(255,255,255,.1); font-size: 12px; }
.footer-bottom p { margin: 5px 0; }
.reveal { transition: opacity .55s ease, transform .55s ease; }
.js .reveal { opacity: 0; transform: translateY(15px); }
.js .reveal.in { opacity: 1; transform: none; }

@media (max-width: 920px) {
  .menu-button { display: inline-grid; place-items: center; }
  .nav { display: none; position: absolute; left: 0; right: 0; top: 72px; padding: 12px 20px 18px; background: #fff; border-bottom: 1px solid var(--line); box-shadow: var(--shadow); }
  .nav.open { display: grid; grid-template-columns: repeat(2, 1fr); }
  .nav .download { text-align: center; }
  .hero-grid { grid-template-columns: 1fr; padding-block: 52px; }
  .hero-visual { min-height: 420px; }
  .note-card { right: 8%; }
  .grid.four, .shots { grid-template-columns: repeat(2, 1fr); }
  .grid.three, .reviews { grid-template-columns: 1fr; }
  .split, .split.reverse { grid-template-columns: 1fr; gap: 30px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-grid > :first-child { grid-column: 1 / -1; }
}

@media (max-width: 620px) {
  .wrap, .prose { width: min(100% - 28px, 1120px); }
  .site-header .wrap { width: min(100% - 24px, 1120px); }
  .header-inner { min-height: 64px; }
  .nav { top: 64px; grid-template-columns: 1fr !important; }
  .brand img { width: 38px; height: 38px; }
  .hero-grid { min-height: 0; padding-block: 40px; gap: 24px; }
  .hero h1 { font-size: 38px; }
  .hero-copy { font-size: 15px; }
  .hero-visual { min-height: 375px; }
  .phone { width: 240px; }
  .note-card { right: 0; bottom: 20px; width: 180px; }
  .section { padding: 52px 0; }
  .section-head { display: block; margin-bottom: 24px; }
  .section-head h2, .split-copy h2 { font-size: 25px; }
  .section-head .hint { margin-top: 10px; }
  .grid.four, .shots { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
  .card { padding: 18px; }
  .shots .shot { padding: 6px; }
  .shot figcaption { font-size: 11px; }
  .shot figcaption b { font-size: 13px; }
  .log-list { grid-template-columns: 1fr; }
  .log-list dt { padding-bottom: 0; border: 0; }
  .reader-panel { grid-template-columns: 1fr 1fr; padding: 14px; }
  .reader-panel div { padding: 13px; }
  .cta-band { grid-template-columns: 1fr; padding: 26px 22px; }
  .cta-band .btn { width: 100%; }
  .page-hero .wrap { padding-block: 38px; }
  .page-hero h1 { font-size: 31px; }
  .prose { padding-top: 40px; }
  .prose h2 { font-size: 23px; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .footer-grid > :first-child { grid-column: auto; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, .reveal { transition: none !important; }
  .js .reveal { opacity: 1; transform: none; }
}