:root {
  --teal: #12645f;
  --teal-dark: #0b4543;
  --steel: #39788d;
  --mint: #eaf6f3;
  --mint-soft: #f5fbf9;
  --ink: #182626;
  --muted: #5c6b6b;
  --line: #d7e5e2;
  --white: #ffffff;
  --signal: #c8513d;
  --shadow: 0 16px 36px rgba(15, 72, 68, 0.12);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--white); font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "微软雅黑", Arial, Helvetica, sans-serif; line-height: 1.7; }
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
button { font: inherit; }
.topbar-row, .masthead-grid, .block-inner, .closing-inner, .footer > div, .guide-head-inner, .manual-shell, .faq-head-inner, .faq-main-inner { width: min(1180px, calc(100% - 48px)); margin: 0 auto; }

.topbar { position: sticky; top: 0; z-index: 20; min-height: 70px; background: rgba(255,255,255,.97); border-bottom: 1px solid var(--line); backdrop-filter: blur(12px); }
.topbar-row { min-height: 70px; display: flex; align-items: center; gap: 30px; }
.mark { display: flex; align-items: center; gap: 10px; color: var(--teal-dark); font-weight: 800; }
.mark img { width: 42px; height: 42px; border-radius: 6px; }
.primary-nav { display: flex; gap: 22px; margin: 0 auto; }
.primary-nav a { position: relative; padding: 24px 2px 20px; color: var(--muted); font-size: 14px; }
.primary-nav a::after { content: ""; position: absolute; left: 0; right: 0; bottom: -1px; height: 2px; background: transparent; }
.primary-nav a:hover, .primary-nav a.is-current { color: var(--teal-dark); }
.primary-nav a.is-current::after { background: var(--teal); }
.topbar-downloads, .masthead-actions, .closing-inner > div:last-child, .manual-call > div { display: flex; gap: 10px; }
.action { min-height: 42px; display: inline-flex; align-items: center; justify-content: center; padding: 9px 18px; border: 1px solid transparent; border-radius: 6px; font-size: 14px; font-weight: 800; line-height: 1.2; transition: transform .2s ease, box-shadow .2s ease; }
.action:hover { transform: translateY(-1px); }
.action-main { color: #fff; background: var(--teal); box-shadow: 0 8px 18px rgba(18,100,95,.18); }
.action-ios { color: var(--teal-dark); border-color: #9fc3bd; background: var(--white); }
.action-wide { min-height: 50px; padding: 13px 25px; font-size: 16px; }
.nav-trigger { display: none; width: 42px; height: 42px; padding: 10px; border: 1px solid var(--line); border-radius: 6px; background: #fff; }
.nav-trigger span { display: block; height: 2px; margin: 5px 0; background: var(--teal-dark); transition: transform .2s ease; }

.masthead { background: var(--mint-soft); border-bottom: 1px solid var(--line); }
.masthead-grid { min-height: 610px; display: grid; grid-template-columns: 1.05fr .95fr; gap: 68px; align-items: center; padding: 44px 0 30px; }
.product-tag { display: inline-flex; color: var(--signal); font-size: 13px; font-weight: 800; margin-bottom: 14px; }
h1, h2, h3, p { margin-top: 0; }
h1 { margin-bottom: 20px; color: var(--teal-dark); font-size: clamp(38px, 4vw, 58px); line-height: 1.16; letter-spacing: 0; }
.masthead-copy > p { max-width: 650px; margin-bottom: 26px; color: #455e5c; font-size: 17px; }
.support-line { display: flex; gap: 34px; margin: 30px 0 0; padding: 17px 0 0; border-top: 1px solid #bed8d3; list-style: none; }
.support-line li { display: grid; }
.support-line strong { color: var(--muted); font-size: 12px; font-weight: 600; }
.support-line span { color: var(--teal-dark); font-weight: 800; }
.workspace { position: relative; min-height: 470px; display: flex; align-items: center; justify-content: flex-start; padding-left: 18px; }
.workspace-screen { width: 236px; padding: 12px; background: #fff; border: 1px solid var(--line); border-radius: 8px; box-shadow: var(--shadow); }
.workspace-screen img { width: 212px; max-width: 400px; max-height: 378px; object-fit: contain; border-radius: 5px; }
.proof-panel { position: absolute; right: 0; bottom: 58px; width: 255px; padding: 22px; background: var(--teal-dark); color: #fff; border-radius: 8px; box-shadow: var(--shadow); }
.proof-label { display: block; color: #9dd5ca; font-size: 12px; font-weight: 800; }
.proof-panel > strong { display: block; margin: 6px 0 8px; font-size: 23px; }
.proof-panel p { margin-bottom: 18px; color: #d5ebe7; font-size: 13px; }
.proof-panel dl { display: grid; grid-template-columns: 1fr 1fr; margin: 0; padding-top: 13px; border-top: 1px solid rgba(255,255,255,.18); }
.proof-panel dt { color: #9dd5ca; font-size: 11px; }
.proof-panel dd { margin: 0; font-size: 13px; font-weight: 800; }
.context-strip { width: min(1180px, calc(100% - 48px)); margin: 0 auto; display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--line); }
.context-strip span { padding: 16px; color: var(--muted); font-size: 13px; text-align: center; border-right: 1px solid var(--line); }
.context-strip span:last-child { border-right: 0; }

.block { padding: 82px 0; }
.block-title { display: flex; align-items: baseline; gap: 16px; margin-bottom: 34px; }
.block-title span { color: var(--signal); font-size: 13px; font-weight: 800; }
.block-title h2 { margin: 0; color: var(--teal-dark); font-size: clamp(28px, 3vw, 40px); line-height: 1.2; }
.advantages { background: #fff; }
.advantage-list { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.advantage-list article { padding: 30px; border-right: 1px solid var(--line); }
.advantage-list article:last-child { border-right: 0; }
.advantage-list h3 { color: var(--teal-dark); font-size: 20px; }
.advantage-list p { margin: 0; color: var(--muted); font-size: 15px; }
.permission-path { background: var(--mint); }
.path-grid, .map-grid { display: grid; grid-template-columns: 160px 1fr; gap: 52px; }
.vertical-title { align-self: start; display: grid; gap: 8px; margin: 0; }
.permission-steps { margin: 0; padding: 0; list-style: none; display: grid; gap: 12px; }
.permission-steps li { display: grid; grid-template-columns: 90px 1fr; gap: 22px; align-items: center; padding: 20px 24px; background: #fff; border: 1px solid var(--line); border-radius: 8px; }
.permission-steps li > span { color: var(--teal); font-size: 13px; font-weight: 800; }
.permission-steps h3 { margin-bottom: 5px; font-size: 18px; }
.permission-steps p { margin: 0; color: var(--muted); font-size: 14px; }
.path-note { grid-column: 2; display: flex; justify-content: space-between; padding: 18px 24px; color: var(--teal-dark); border-left: 3px solid var(--signal); background: rgba(255,255,255,.55); }
.path-note a, .inline-link, .answer-next a, .manual a { color: var(--teal); font-weight: 800; text-decoration: underline; text-decoration-color: #8abbb2; text-underline-offset: 4px; }
.preview-block { background: #fff; }
.screen-board { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.screen-board figure { margin: 0; overflow: hidden; border: 1px solid var(--line); border-radius: 8px; background: var(--mint-soft); }
.screen-mat { min-height: 380px; display: flex; align-items: center; justify-content: center; padding: 28px 20px; border-bottom: 1px solid var(--line); }
.screen-mat img { width: 194px; max-width: 400px; max-height: 346px; object-fit: contain; border-radius: 6px; box-shadow: 0 10px 24px rgba(18, 71, 67, .1); }
.screen-board figcaption { display: grid; gap: 5px; padding: 20px 22px; }
.screen-board figcaption strong { color: var(--teal-dark); font-size: 18px; }
.screen-board figcaption span { color: var(--muted); font-size: 14px; }
.tool-map { background: #f7faf9; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.tool-table { border-top: 1px solid var(--line); }
.tool-table > div { display: grid; grid-template-columns: 170px 1fr 110px; gap: 24px; align-items: center; padding: 20px 0; border-bottom: 1px solid var(--line); }
.tool-table strong { color: var(--teal-dark); }
.tool-table span { color: var(--muted); }
.tool-table b { color: var(--steel); font-size: 12px; text-align: right; }
.question-columns { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; margin-bottom: 26px; }
.question-columns article { padding: 24px 0; border-top: 3px solid var(--teal); }
.question-columns h3 { min-height: 54px; color: var(--teal-dark); font-size: 18px; }
.question-columns p { margin: 0; color: var(--muted); font-size: 14px; }
.closing-call { padding: 46px 0; color: #fff; background: var(--teal-dark); }
.closing-inner { display: flex; justify-content: space-between; align-items: center; gap: 30px; }
.closing-inner span { color: #9dd5ca; font-size: 13px; }
.closing-inner h2 { margin: 5px 0 0; font-size: 30px; }
.action-light { color: var(--teal-dark); background: #fff; }
.action-outline { color: #fff; border-color: #9fc3bd; }
.footer { padding: 28px 0; background: #f5f8f7; color: var(--muted); text-align: center; }
.footer p { margin: 4px 0; font-size: 13px; }

.guide-head, .faq-head { background: var(--mint-soft); border-bottom: 1px solid var(--line); }
.guide-head-inner { min-height: 420px; display: grid; grid-template-columns: 1fr 330px; gap: 80px; align-items: center; padding: 54px 0; }
.guide-head h1, .faq-head h1 { font-size: clamp(36px, 4vw, 52px); }
.guide-head p, .faq-head p { color: var(--muted); font-size: 17px; }
.guide-status { padding: 26px; color: #fff; background: var(--teal-dark); border-radius: 8px; }
.guide-status > span { color: #9dd5ca; font-size: 12px; font-weight: 800; }
.guide-status > strong { display: block; margin: 8px 0 14px; font-size: 24px; }
.guide-status ul { margin: 0; padding: 14px 0 0 18px; border-top: 1px solid rgba(255,255,255,.18); }
.manual-shell { display: grid; grid-template-columns: 220px 1fr; gap: 60px; padding-top: 72px; padding-bottom: 88px; }
.manual-index { position: sticky; top: 100px; align-self: start; display: grid; gap: 11px; padding: 22px; background: var(--mint); border-radius: 8px; }
.manual-index a { color: var(--muted); font-size: 14px; }
.manual > section { padding-bottom: 42px; margin-bottom: 42px; border-bottom: 1px solid var(--line); }
.manual > section > span { color: var(--signal); font-size: 12px; font-weight: 800; }
.manual h2 { margin: 6px 0 16px; color: var(--teal-dark); font-size: 28px; }
.manual p { color: #465d5b; }
.manual-call { display: flex; justify-content: space-between; align-items: center; gap: 24px; padding: 26px; background: var(--mint-soft); border: 1px solid var(--line); border-radius: 8px; }

.faq-head { padding: 72px 0 56px; }
.faq-head h1 { margin-bottom: 18px; }
.faq-head-row { display: flex; justify-content: space-between; gap: 60px; align-items: end; }
.faq-head-row p { max-width: 730px; margin: 0; }
.faq-legend { display: grid; grid-template-columns: 1fr 1fr; border: 1px solid var(--line); background: #fff; }
.faq-legend span { min-width: 70px; padding: 8px 12px; color: var(--teal); font-size: 12px; font-weight: 800; text-align: center; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.faq-main { padding: 76px 0 88px; }
.faq-main-inner { display: grid; grid-template-columns: 300px 1fr; gap: 62px; align-items: start; }
.triage { position: sticky; top: 100px; padding: 24px; background: var(--mint); border-radius: 8px; }
.triage h2 { color: var(--teal-dark); font-size: 24px; }
.triage > div { display: flex; align-items: center; gap: 12px; padding: 10px 0; border-bottom: 1px solid #c9dfda; }
.triage b { color: var(--signal); }
.triage span { color: var(--muted); font-size: 14px; }
.triage img { width: 150px; max-height: 268px; object-fit: contain; margin: 24px auto 0; border-radius: 6px; box-shadow: var(--shadow); }
.answer-list article { border-bottom: 1px solid var(--line); }
.answer-list button { width: 100%; display: flex; align-items: center; gap: 16px; padding: 19px 0; color: var(--teal-dark); background: transparent; border: 0; text-align: left; font-weight: 800; cursor: pointer; }
.answer-list button span { color: var(--signal); font-size: 12px; }
.answer { display: none; padding: 0 24px 18px 37px; color: var(--muted); }
.answer.open { display: block; }
.answer p { margin: 0; }
.answer-next { margin-top: 34px; padding: 25px; display: flex; justify-content: space-between; gap: 20px; background: var(--mint-soft); border-left: 3px solid var(--signal); }

@media (max-width: 960px) {
  .topbar-downloads { display: none; }
  .workspace { padding-left: 0; }
  .advantage-list { grid-template-columns: 1fr; }
  .advantage-list article { border-right: 0; border-bottom: 1px solid var(--line); }
  .screen-board { grid-template-columns: 1fr 1fr; }
  .screen-board figure:last-child { grid-column: 1 / -1; }
}

@media (max-width: 760px) {
  .topbar-row, .masthead-grid, .block-inner, .closing-inner, .footer > div, .guide-head-inner, .manual-shell, .faq-head-inner, .faq-main-inner, .context-strip { width: calc(100% - 32px); }
  .topbar, .topbar-row { min-height: 64px; }
  .mark img { width: 38px; height: 38px; }
  .nav-trigger { display: block; margin-left: auto; }
  .primary-nav { display: none; position: absolute; left: 16px; right: 16px; top: 70px; margin: 0; padding: 9px; background: #fff; border: 1px solid var(--line); border-radius: 8px; box-shadow: var(--shadow); }
  .primary-nav.open { display: grid; }
  .primary-nav a { padding: 12px; }
  .primary-nav a::after { display: none; }
  .masthead-grid { min-height: 0; grid-template-columns: 1fr; gap: 12px; padding: 30px 0 18px; }
  h1 { font-size: 34px; }
  .masthead-copy > p { font-size: 15px; }
  .masthead-actions .action { flex: 1; padding-left: 12px; padding-right: 12px; }
  .support-line { justify-content: space-between; gap: 8px; margin-top: 20px; }
  .support-line span { font-size: 13px; }
  .workspace { min-height: 240px; justify-content: flex-start; padding-left: 16px; border-top: 1px solid var(--line); }
  .workspace-screen { width: 140px; padding: 6px; }
  .workspace-screen img { width: 126px; max-height: 225px; }
  .proof-panel { width: 190px; right: 0; bottom: 18px; padding: 15px; }
  .proof-panel > strong { font-size: 18px; }
  .proof-panel p { margin-bottom: 10px; font-size: 11px; }
  .context-strip { grid-template-columns: 1fr 1fr; }
  .context-strip span:nth-child(2) { border-right: 0; }
  .context-strip span { padding: 6px 10px; }
  .block { padding: 58px 0; }
  .path-grid, .map-grid { grid-template-columns: 1fr; gap: 28px; }
  .vertical-title { display: flex; }
  .path-note { grid-column: 1; display: grid; gap: 5px; }
  .permission-steps li { grid-template-columns: 68px 1fr; padding: 18px; }
  .screen-board { grid-template-columns: 1fr; }
  .screen-board figure:last-child { grid-column: auto; }
  .screen-mat { min-height: 300px; }
  .screen-mat img { width: 165px; max-height: 294px; }
  .tool-table > div { grid-template-columns: 1fr; gap: 5px; }
  .tool-table b { text-align: left; }
  .question-columns { grid-template-columns: 1fr; gap: 6px; }
  .question-columns h3 { min-height: 0; }
  .closing-inner, .manual-call { align-items: flex-start; flex-direction: column; }
  .closing-inner > div:last-child, .manual-call > div { width: 100%; }
  .closing-inner .action, .manual-call .action { flex: 1; }
  .guide-head-inner { min-height: 0; grid-template-columns: 1fr; gap: 20px; padding: 40px 0; }
  .guide-head h1 { font-size: 30px; }
  .guide-status { padding: 20px; }
  .manual-shell, .faq-main-inner { grid-template-columns: 1fr; gap: 34px; padding-top: 52px; }
  .manual-index, .triage { position: static; }
  .manual-index { grid-template-columns: 1fr 1fr; }
  .manual-index strong { grid-column: 1 / -1; }
  .faq-head { padding: 48px 0 38px; }
  .faq-head h1 { font-size: 32px; }
  .faq-head-row { display: grid; gap: 22px; }
  .faq-legend { width: fit-content; }
  .triage img { width: 125px; max-height: 223px; }
  .answer-next { display: grid; }
}

@media (max-width: 410px) {
  .mark span { font-size: 15px; }
  h1 { font-size: 31px; }
  .proof-panel { width: 176px; }
  .proof-panel dl { display: none; }
  .context-strip span { font-size: 12px; }
}