:root {
  --ink: #1c2b2a;
  --muted: #60706e;
  --primary: #15735d;
  --primary-dark: #0c5545;
  --alert: #a84461;
  --line: #d8e1de;
  --soft: #f3f6f4;
  --paper: #ffffff;
  --deep: #17312c;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--paper); font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "微软雅黑", Arial, Helvetica, sans-serif; line-height: 1.7; }
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; height: auto; }
button { font: inherit; }
.wrap { width: min(1160px, calc(100% - 48px)); margin: 0 auto; }
.topbar { position: sticky; top: 0; z-index: 20; background: rgba(255,255,255,.97); border-bottom: 1px solid var(--line); }
.topbar-inner { min-height: 76px; display: flex; align-items: center; gap: 28px; }
.identity { display: flex; align-items: center; gap: 12px; }
.identity img { border-radius: 4px; }
.identity span { display: grid; line-height: 1.25; }
.identity strong { font-size: 16px; }
.identity small { color: var(--muted); font-size: 11px; }
.site-nav { display: flex; gap: 26px; margin-left: auto; }
.site-nav a { padding: 25px 0 22px; border-bottom: 3px solid transparent; color: var(--muted); font-size: 14px; }
.site-nav a:hover, .site-nav a.current { color: var(--primary-dark); border-color: var(--primary); }
.top-actions { display: flex; align-items: center; gap: 14px; }
.ios-link { color: var(--primary-dark); font-size: 14px; font-weight: 800; }
.primary-link, .secondary-link, .dark-link { min-height: 46px; display: inline-flex; align-items: center; justify-content: center; padding: 0 24px; border: 1px solid var(--primary); border-radius: 4px; background: var(--primary); color: #fff; font-weight: 800; transition: background .2s ease, transform .2s ease; }
.primary-link:hover, .dark-link:hover { background: var(--primary-dark); transform: translateY(-1px); }
.compact { min-height: 38px; padding: 0 17px; font-size: 14px; }
.secondary-link { color: var(--primary-dark); background: transparent; border-color: #a8c4bb; }
.secondary-link:hover { color: #fff; background: var(--primary-dark); }
.nav-switch { display: none; min-width: 48px; height: 38px; border: 1px solid var(--line); border-radius: 4px; background: #fff; color: var(--ink); }
.hero { background: #f5f8f6; border-bottom: 1px solid var(--line); }
.hero-layout { min-height: 650px; display: grid; grid-template-columns: .88fr 1.12fr; gap: 56px; align-items: center; padding: 44px 0 48px; }
.kicker { display: block; margin-bottom: 13px; color: var(--alert); font-size: 12px; font-weight: 900; letter-spacing: 0; }
.hero h1, .subhero h1 { max-width: 600px; margin: 0; font-size: 48px; line-height: 1.15; letter-spacing: 0; }
.hero-copy > p, .subhero p { max-width: 610px; margin: 20px 0 0; color: var(--muted); font-size: 17px; }
.action-row { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 26px; }
.status-ruler { margin-top: 32px; display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid #bfcfc9; border-bottom: 1px solid #bfcfc9; }
.status-ruler span { padding: 12px 8px 12px 0; color: var(--muted); font-size: 13px; }
.status-ruler span + span { padding-left: 12px; border-left: 1px solid #bfcfc9; }
.status-ruler b { display: block; color: var(--primary); font-size: 11px; }
.report-board { padding: 22px; border: 1px solid #cad7d2; background: #fff; box-shadow: 0 18px 46px rgba(29,72,61,.11); }
.report-head { display: flex; justify-content: space-between; padding-bottom: 13px; border-bottom: 1px solid var(--line); color: var(--muted); font-size: 12px; }
.report-grid { display: grid; grid-template-columns: minmax(0, 1.35fr) minmax(150px, .65fr); gap: 16px; padding-top: 16px; }
.device-sheet, .tool-strip { margin: 0; }
.device-sheet { padding: 12px; background: var(--soft); }
.device-sheet img, .tool-strip img { width: 100%; max-width: 400px; margin: 0 auto; }
.device-sheet figcaption, .tool-strip figcaption { margin-top: 8px; color: var(--muted); font-size: 12px; }
.metric-column { display: grid; gap: 8px; }
.metric { padding: 15px; border: 1px solid var(--line); }
.metric span, .metric small, .metric strong { display: block; }
.metric span { color: var(--muted); font-size: 11px; }
.metric strong { margin-top: 10px; font-size: 18px; }
.metric small { color: var(--muted); font-size: 11px; }
.metric-accent { border-top: 3px solid var(--alert); }
.tool-strip { margin-top: 16px; padding: 12px; border-top: 1px solid var(--line); }
.tool-strip img { max-height: 128px; object-fit: cover; object-position: center; }
.section-pad { padding: 80px 0; }
.title-row { display: flex; align-items: baseline; justify-content: space-between; gap: 24px; margin-bottom: 28px; }
.title-row h2 { margin: 0; font-size: 32px; line-height: 1.2; }
.title-row > span { color: var(--muted); font-size: 13px; }
.ledger { border-top: 1px solid var(--line); }
.ledger article { display: grid; grid-template-columns: 58px 1fr auto; gap: 26px; align-items: center; padding: 22px 0; border-bottom: 1px solid var(--line); }
.ledger-no { width: 42px; height: 42px; display: grid; place-items: center; border: 1px solid var(--primary); color: var(--primary); font-weight: 900; }
.ledger h3 { margin: 0 0 4px; font-size: 19px; }
.ledger p { margin: 0; color: var(--muted); font-size: 14px; }
.ledger article > b { color: var(--primary-dark); font-size: 12px; }
.capabilities { background: var(--deep); color: #fff; }
.capability-layout { display: grid; grid-template-columns: .72fr 1.28fr; gap: 72px; }
.capability-intro { align-self: start; }
.capability-intro p { color: #b8cbc5; }
.capability-intro a { display: inline-block; margin-top: 14px; color: #91d5c0; font-weight: 800; }
.capability-list { display: grid; grid-template-columns: repeat(2, 1fr); border-top: 1px solid #416059; border-left: 1px solid #416059; }
.capability-list article { min-height: 190px; padding: 24px; border-right: 1px solid #416059; border-bottom: 1px solid #416059; }
.capability-list span { color: #91d5c0; font-size: 12px; }
.capability-list h3 { margin: 32px 0 7px; }
.capability-list p { margin: 0; color: #b8cbc5; font-size: 14px; }
.battery { background: var(--soft); }
.battery-layout { display: grid; grid-template-columns: 1.2fr .8fr; gap: 70px; align-items: center; }
.battery-steps { margin: 0; padding: 0; list-style: none; }
.battery-steps li { display: grid; grid-template-columns: 44px 1fr; gap: 16px; padding: 18px 0; border-top: 1px solid var(--line); }
.battery-steps b { width: 34px; height: 34px; display: grid; place-items: center; background: var(--primary); color: #fff; }
.battery-steps strong { display: block; }
.battery-steps p { margin: 3px 0 0; color: var(--muted); font-size: 14px; }
.battery-note { padding: 32px; border: 1px solid var(--line); border-top: 4px solid var(--alert); background: #fff; }
.battery-note span { color: var(--alert); font-size: 12px; font-weight: 900; }
.battery-note h3 { margin: 16px 0 10px; font-size: 23px; }
.battery-note p { color: var(--muted); }
.showcase-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 26px; }
.showcase-grid figure { min-height: 440px; margin: 0; display: grid; grid-template-columns: 1.2fr .8fr; gap: 24px; align-items: center; padding: 28px; border: 1px solid var(--line); }
.showcase-grid img { width: 100%; max-width: 400px; max-height: 360px; object-fit: contain; }
.showcase-grid strong { font-size: 18px; }
.showcase-grid p { color: var(--muted); font-size: 14px; }
.questions { padding-top: 20px; }
.question-row { display: flex; align-items: center; justify-content: space-between; gap: 40px; padding: 38px 0; border-top: 3px solid var(--primary); }
.question-row .title-row { margin-bottom: 7px; }
.question-row p { margin: 0; color: var(--muted); }
.dark-link { background: var(--deep); border-color: var(--deep); white-space: nowrap; }
.final-call { padding: 46px 0; background: #21463e; color: #fff; }
.final-inner { display: flex; align-items: center; justify-content: space-between; gap: 32px; }
.final-inner span { color: #a9c9c0; font-size: 12px; }
.final-inner h2 { margin: 4px 0 0; font-size: 28px; }
.final-call .action-row { margin-top: 0; }
.secondary-link.light { color: #fff; border-color: #89a9a0; }
.footer { padding: 32px 0; background: #102520; color: #abc0ba; text-align: center; font-size: 13px; }
.footer p { margin: 4px 0; }
.subhero { background: #edf3f0; border-bottom: 1px solid var(--line); }
.subhero-layout { min-height: 410px; display: grid; grid-template-columns: 1.1fr .9fr; gap: 72px; align-items: center; padding: 48px 0; }
.subhero h1 { font-size: 43px; }
.subhero-index { display: grid; border: 1px solid var(--line); background: #fff; }
.subhero-index span { padding: 14px 18px; color: var(--alert); font-size: 12px; font-weight: 900; border-bottom: 1px solid var(--line); }
.subhero-index b { padding: 12px 18px; font-size: 14px; border-bottom: 1px solid var(--line); }
.subhero-index b:last-child { border-bottom: 0; }
.manual-layout { display: grid; grid-template-columns: 220px minmax(0, 1fr); gap: 70px; align-items: start; }
.manual-nav, .faq-categories { position: sticky; top: 100px; display: grid; border: 1px solid var(--line); }
.manual-nav strong, .faq-categories strong { padding: 16px; background: var(--deep); color: #fff; }
.manual-nav a, .faq-categories a { padding: 10px 16px; color: var(--muted); font-size: 14px; border-top: 1px solid var(--line); }
.manual section { padding: 0 0 46px; }
.manual section + section { padding-top: 40px; border-top: 1px solid var(--line); }
.manual section > span { color: var(--primary); font-size: 11px; font-weight: 900; }
.manual h2 { margin: 8px 0 15px; font-size: 28px; }
.manual p { margin: 0 0 13px; color: #495c58; }
.faq-subhero { background: #f6f2f3; }
.faq-manual { display: grid; grid-template-columns: 220px minmax(0, 1fr); gap: 70px; align-items: start; }
.faq-stack > h2 { margin: 40px 0 8px; padding-bottom: 10px; border-bottom: 3px solid var(--primary); font-size: 25px; }
.faq-stack > h2:first-child { margin-top: 0; }
.faq-stack details { border-bottom: 1px solid var(--line); }
.faq-stack summary { position: relative; padding: 19px 42px 19px 0; cursor: pointer; list-style: none; font-weight: 800; }
.faq-stack summary::after { content: "+"; position: absolute; right: 8px; top: 13px; color: var(--primary); font-size: 24px; font-weight: 400; }
.faq-stack details[open] summary::after { content: "−"; }
.faq-stack details p { margin: -2px 0 22px; color: var(--muted); }

@media (max-width: 980px) {
  .site-nav { gap: 15px; }
  .hero-layout { grid-template-columns: .8fr 1.2fr; gap: 28px; }
  .report-grid { grid-template-columns: 1fr; }
  .metric-column { grid-template-columns: repeat(3, 1fr); }
  .metric strong { font-size: 14px; }
  .tool-strip { display: none; }
  .showcase-grid figure { grid-template-columns: 1fr; }
}

@media (max-width: 760px) {
  .wrap { width: min(100% - 32px, 680px); }
  .topbar-inner { min-height: 66px; }
  .identity img { width: 40px; height: 40px; }
  .identity small { display: none; }
  .top-actions { margin-left: auto; }
  .top-actions .ios-link, .top-actions .primary-link { display: none; }
  .nav-switch { display: inline-flex; align-items: center; justify-content: center; }
  .site-nav { display: none; position: absolute; top: 66px; left: 16px; right: 16px; padding: 8px 16px; background: #fff; border: 1px solid var(--line); box-shadow: 0 14px 30px rgba(23,49,44,.14); }
  .site-nav.open { display: grid; }
  .site-nav a { padding: 11px 0; border-bottom: 1px solid var(--line); }
  .hero-layout { min-height: 696px; grid-template-columns: 1fr; gap: 20px; padding: 32px 0 20px; }
  .hero h1, .subhero h1 { font-size: 34px; line-height: 1.2; }
  .hero-copy > p, .subhero p { margin-top: 14px; font-size: 15px; }
  .action-row { margin-top: 19px; }
  .status-ruler { margin-top: 20px; }
  .report-board { padding: 14px; }
  .report-grid { grid-template-columns: 1.15fr .85fr; }
  .device-sheet { padding: 8px; }
  .device-sheet img { max-height: 205px; object-fit: contain; }
  .metric-column { grid-template-columns: 1fr; }
  .metric { padding: 9px 11px; }
  .metric strong { margin-top: 2px; font-size: 13px; }
  .metric small { display: none; }
  .section-pad { padding: 58px 0; }
  .title-row h2 { font-size: 28px; }
  .ledger article { grid-template-columns: 46px 1fr; gap: 14px; }
  .ledger article > b { grid-column: 2; }
  .capability-layout, .battery-layout, .subhero-layout, .manual-layout, .faq-manual { grid-template-columns: 1fr; gap: 36px; }
  .capability-list { grid-template-columns: 1fr; }
  .capability-list article { min-height: auto; }
  .showcase-grid { grid-template-columns: 1fr; }
  .showcase-grid figure { min-height: auto; grid-template-columns: 130px 1fr; padding: 20px; }
  .showcase-grid img { max-height: 220px; }
  .question-row, .final-inner { align-items: flex-start; flex-direction: column; }
  .subhero-layout { min-height: auto; padding: 46px 0; }
  .manual-nav, .faq-categories { position: static; grid-template-columns: repeat(2, 1fr); }
  .manual-nav strong, .faq-categories strong { grid-column: 1 / -1; }
  .final-call .action-row { margin-top: 0; }
}

@media (max-width: 420px) {
  .hero-layout { min-height: 690px; }
  .hero h1, .subhero h1 { font-size: 31px; }
  .status-ruler span { font-size: 11px; }
  .showcase-grid figure { grid-template-columns: 110px 1fr; }
}