/* 颜色取自 LoboOS 应用自己的主题（loboo-mono 的 desktop-go/view.go），浅色和深色各一套。 */
:root {
  color-scheme: light dark;
  --page: #faf8f3;
  --band: #fff;
  --card: #fff;
  --soft: #f3f1ea;
  --ink: #282c24;
  --muted: #696b60;
  --faint: #797b70;
  --line: #e2e3d9;
  --line-strong: #cfd0c5;
  --accent: #b75a21;
  --accent-hover: #a5511e;
  --accent-ink: #a5511e;
  --accent-soft: #f8ece1;
  --accent-line: #ecd3bf;
  --lilac: #e6e5f6;
  --selected: rgb(40 44 36 / 9%);
  --pressed: #e2e0d7;
  --bubble: #eceae2;
  --success: #3f8a3c;
  --warning: #b54708;
  --frame: #2b2e27;
  --panel: #272b23;
  --panel-line: #454a3f;
  --panel-ink: #f4f2ea;
  --panel-muted: #c3c5b8;
  --panel-accent: #e6a878;
  --container: 1200px;
  --shadow: 0 18px 50px rgb(40 44 36 / 9%);
  --shadow-soft: 0 6px 24px rgb(40 44 36 / 8%);
}
@media (prefers-color-scheme: dark) {
  :root {
    --page: #1c1d1a;
    --band: #20211e;
    --card: #242521;
    --soft: #171815;
    --ink: #e8e9e2;
    --muted: #adafa3;
    --faint: #a2a498;
    --line: #393a35;
    --line-strong: #4d4e48;
    --accent-hover: #c5652a;
    --accent-ink: #e59a61;
    --accent-soft: #33271d;
    --accent-line: #5a3d27;
    --lilac: #2a2942;
    --selected: rgb(255 255 255 / 10%);
    --pressed: #3a3b35;
    --bubble: #30312c;
    --success: #6dbb68;
    --warning: #fdb022;
    --frame: #50514a;
    --panel: #242521;
    --panel-line: #393a35;
    --panel-ink: #e8e9e2;
    --panel-muted: #a2a498;
    --panel-accent: #e59a61;
    --shadow: 0 18px 50px rgb(0 0 0 / 40%);
    --shadow-soft: 0 6px 24px rgb(0 0 0 / 34%);
  }
}

/* 基础 */
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 104px; }
body { margin: 0; background: var(--page); color: var(--ink); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif; font-size: 16px; line-height: 1.7; -webkit-font-smoothing: antialiased; }
body.menu-open { overflow: hidden; }
button, a { -webkit-tap-highlight-color: transparent; outline-offset: 5px; }
button { font: inherit; cursor: pointer; }
a { color: inherit; text-decoration: none; }
button, [href] { touch-action: manipulation; }
img { display: block; max-width: 100%; height: auto; }
:focus-visible { outline: 2px solid var(--accent-ink); }
::selection { color: var(--ink); background: var(--accent-line); }
[hidden] { display: none !important; }
h1, h2, h3, p { margin-top: 0; }
h1, h2, h3 { font-weight: 600; }
ul, dl, dd { margin: 0; padding: 0; }
ul { list-style: none; }
.container { width: min(var(--container), calc(100% - 96px)); margin-inline: auto; }
.section-space { padding-block: 104px; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; overflow: hidden; clip-path: inset(50%); white-space: nowrap; border: 0; }
.skip-link { position: fixed; z-index: 100; top: 12px; left: 16px; padding: 10px 18px; border-radius: 8px; background: var(--ink); color: var(--page); transform: translateY(-160%); }
.skip-link:focus { transform: translateY(0); }
.icon-library { position: absolute; width: 0; height: 0; overflow: hidden; }
.icon { display: block; width: 24px; height: 24px; flex: none; fill: none; stroke: currentColor; stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; }

/* 页头 */
.site-header { position: sticky; top: 0; z-index: 20; background: var(--page); border-bottom: 1px solid transparent; transition: border-color .2s; }
.site-header.is-scrolled { border-color: var(--line); }
.header-inner { display: flex; align-items: center; justify-content: space-between; min-height: 84px; gap: 32px; }
.brand { display: inline-flex; align-items: center; gap: 11px; flex-shrink: 0; }
.brand img { width: 40px; height: 40px; }
.brand-name { font-size: 22px; font-weight: 700; letter-spacing: -.03em; white-space: nowrap; }
.site-nav { display: flex; align-items: center; gap: 34px; font-size: 14px; font-weight: 500; }
.site-nav > a { transition: color .2s; }
.site-nav > a:hover { color: var(--accent-ink); }
.site-nav .nav-cta { display: flex; align-items: center; justify-content: center; gap: 14px; min-height: 44px; padding: 9px 20px; border: 1px solid var(--line-strong); border-radius: 99px; }
.site-nav .nav-cta:hover { border-color: var(--accent-ink); background: var(--accent-soft); }
.nav-cta .icon { width: 18px; height: 18px; }
.menu-toggle { display: none; align-items: center; justify-content: center; flex-direction: column; gap: 6px; width: 44px; height: 44px; padding: 10px; border: 1px solid var(--line); border-radius: 50%; background: var(--card); }
.menu-line { width: 18px; height: 1.5px; background: var(--ink); transition: transform .2s; }
.menu-toggle[aria-expanded="true"] .menu-line:nth-child(2) { transform: translateY(3.75px) rotate(45deg); }
.menu-toggle[aria-expanded="true"] .menu-line:nth-child(3) { transform: translateY(-3.75px) rotate(-45deg); }

/* 首屏 */
.hero { overflow: hidden; overflow: clip; }
.hero-grid { display: grid; grid-template-columns: 1fr 1.1fr; align-items: center; gap: 48px; min-height: 620px; padding-block: 52px 64px; }
.hero-copy { min-width: 0; }
.eyebrow { display: flex; align-items: center; gap: 12px; margin-bottom: 24px; color: var(--muted); font-size: 13px; font-weight: 500; letter-spacing: .08em; }
.small-line { width: 23px; height: 2px; flex: none; background: var(--accent); }
.hero h1 { margin: 0 0 26px; font-size: clamp(34px, 3.6vw, 50px); font-weight: 650; line-height: 1.36; letter-spacing: -.045em; }
.hero h1 > span { color: var(--accent-ink); }
.hero-lede { max-width: 500px; margin-bottom: 32px; color: var(--muted); font-size: 16px; line-height: 1.95; }
.hero-actions { display: flex; align-items: center; gap: 26px; flex-wrap: wrap; }
.button { display: inline-flex; align-items: center; justify-content: center; gap: 18px; min-height: 52px; padding: 13px 24px; border-radius: 99px; font-size: 15px; font-weight: 550; transition: background .2s, transform .2s; }
.button-primary { background: var(--accent); color: #fff; }
.button-primary:hover { background: var(--accent-hover); transform: translateY(-2px); }
.button .icon { width: 21px; height: 21px; }
.text-link { display: inline-flex; align-items: center; gap: 12px; min-height: 44px; font-size: 14px; }
.text-link:hover { color: var(--accent-ink); }
.text-link > span { color: var(--accent-ink); font-size: 20px; }
.availability-note { display: flex; align-items: center; gap: 8px; margin: 22px 0 0; color: var(--muted); font-size: 12px; }
.status-dot { width: 5px; height: 5px; flex: none; background: var(--accent); border-radius: 50%; }
.note-divider { width: 1px; height: 11px; margin-inline: 4px; background: var(--line-strong); }
.hero-art { position: relative; min-width: 0; padding: 40px 0 48px 40px; }
.hero-stage { position: absolute; top: 0; right: -24px; bottom: 0; left: 124px; border-radius: 28px; background: var(--lilac); }
.hero-footer { display: flex; justify-content: space-between; align-items: center; gap: 20px; padding-block: 22px; border-top: 1px solid var(--line); color: var(--muted); font-size: 13px; }
.hero-footer > a { display: inline-flex; align-items: center; gap: 18px; min-height: 32px; white-space: nowrap; }
.hero-footer > a:hover { color: var(--accent-ink); }

/* 应用窗口示意：尺寸和圆角照 desktop-go/look.go 的几档缩小一点 */
.app-window { position: relative; display: grid; grid-template-columns: 172px minmax(0, 1fr); height: 404px; overflow: hidden; border: 1px solid var(--line); border-radius: 14px; background: var(--page); box-shadow: var(--shadow); font-size: 13px; line-height: 1.5; }
.app-sidebar { display: flex; flex-direction: column; min-width: 0; border-right: 1px solid var(--line); background: var(--soft); }
.app-titlebar { display: flex; align-items: center; gap: 7px; height: 40px; flex: none; padding: 0 12px; }
.traffic { width: 10px; height: 10px; flex: none; border-radius: 50%; background: var(--line-strong); }
.app-titlebar-icon { width: 15px; height: 15px; margin-left: auto; color: var(--faint); }
.app-nav { display: grid; gap: 1px; padding: 0 8px 6px; }
.app-list { display: grid; align-content: start; gap: 1px; min-height: 0; padding: 0 8px; }
.app-row { display: flex; align-items: center; gap: 8px; min-width: 0; height: 28px; padding: 0 8px; border-radius: 6px; white-space: nowrap; }
.app-row .icon { width: 14px; height: 14px; }
.app-row.is-selected { background: var(--selected); }
.app-row.is-unread .app-row-name { font-weight: 650; }
.app-row-name { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; }
.app-row-meta { flex: none; color: var(--faint); font-size: 11px; }
.app-group { padding: 12px 8px 4px; color: var(--faint); font-size: 11px; }
.app-dot { width: 7px; height: 7px; flex: none; border-radius: 50%; background: var(--accent); }
.app-dot.is-done { background: var(--success); }
.app-spinner { width: 11px; height: 11px; flex: none; border: 1.6px solid var(--line-strong); border-top-color: var(--faint); border-radius: 50%; }
.app-account { display: flex; align-items: center; gap: 9px; margin-top: auto; padding: 10px 16px; border-top: 1px solid var(--line); }
.app-account .icon { width: 14px; height: 14px; color: var(--faint); }
.app-avatar { display: grid; place-items: center; width: 22px; height: 22px; flex: none; border-radius: 50%; background: var(--accent); color: #fff; font-size: 11px; font-weight: 600; }
.app-main { display: flex; flex-direction: column; justify-content: center; gap: 20px; min-width: 0; padding: 20px 26px 64px; container-type: inline-size; }
.app-hero-title { margin: 0; text-align: center; font-size: 21px; font-weight: 700; letter-spacing: -.02em; }
.composer { padding: 14px 12px 10px 16px; border: 1px solid var(--line); border-radius: 16px; background: var(--card); box-shadow: var(--shadow-soft); }
.composer-input { min-height: 46px; margin: 0; color: var(--faint); }
.composer-bar { display: flex; align-items: center; gap: 4px; margin-left: -8px; }
.composer-plus { display: grid; place-items: center; width: 26px; height: 26px; flex: none; color: var(--faint); }
.composer-plus .icon { width: 15px; height: 15px; }
.chip { display: inline-flex; align-items: center; gap: 5px; height: 26px; flex: none; padding: 0 8px; border-radius: 6px; color: var(--faint); font-size: 12px; white-space: nowrap; }
.chip .icon { width: 13px; height: 13px; }
.chip.is-warn { color: var(--warning); }
.chip-bar { width: 46px; height: 8px; border-radius: 4px; background: var(--pressed); }
.composer-send { display: grid; place-items: center; width: 30px; height: 30px; flex: none; margin-left: auto; border-radius: 50%; background: var(--pressed); color: var(--faint); }
.composer-send .icon { width: 15px; height: 15px; }
@container (max-width: 300px) { .chip-model { display: none; } }
@container (max-width: 236px) { .composer-bar .chip.is-warn { display: none; } }
.toast { position: absolute; z-index: 2; left: 0; bottom: 16px; display: flex; align-items: center; gap: 12px; width: min(272px, 78%); padding: 13px 15px; border: 1px solid var(--line); border-radius: 14px; background: var(--card); box-shadow: var(--shadow); }
.toast img { width: 36px; height: 36px; flex: none; }
.toast div { flex: 1; min-width: 0; }
.toast p { margin: 0; font-size: 14px; font-weight: 600; line-height: 1.5; }
.toast div > span { display: block; overflow: hidden; color: var(--muted); font-size: 12px; text-overflow: ellipsis; white-space: nowrap; }
.toast-label { flex: none; align-self: flex-start; color: var(--faint); font-size: 11px; }

/* 章节标题 */
.section-heading { display: flex; align-items: flex-end; justify-content: space-between; gap: 40px; margin-bottom: 48px; }
.section-index { color: var(--accent-ink); font-size: 12px; font-weight: 500; }
.section-heading .eyebrow { margin-bottom: 20px; }
h2 { margin-bottom: 0; font-size: clamp(29px, 3vw, 38px); line-height: 1.45; letter-spacing: -.04em; }
h2 > span { color: var(--accent-ink); }
.section-description { margin-bottom: 8px; color: var(--muted); font-size: 15px; line-height: 1.9; }

/* 01 怎么做事 */
.work { background: var(--band); }
.scenario-layout { display: grid; grid-template-columns: .8fr 1.2fr; gap: 64px; align-items: start; }
.scenario-tabs { display: grid; gap: 12px; padding-top: 12px; }
.scenario-tab { position: relative; display: flex; align-items: flex-start; width: 100%; gap: 18px; padding: 26px 22px; text-align: left; color: var(--ink); background: transparent; border: 1px solid transparent; border-radius: 14px; transition: background .2s, border-color .2s; }
.scenario-tab:hover { background: var(--page); }
.scenario-tab[aria-selected="true"] { border-color: var(--accent-line); background: var(--accent-soft); }
.scenario-icon { display: grid; place-items: center; width: 39px; height: 39px; flex: none; margin-top: 1px; color: var(--faint); }
.scenario-icon .icon { width: 28px; height: 28px; }
.scenario-tab[aria-selected="true"] .scenario-icon { color: var(--accent-ink); }
.scenario-tab-copy { flex: 1; min-width: 0; }
.scenario-tab-copy > strong { display: block; margin: 0 0 8px; font-size: 20px; font-weight: 600; }
.scenario-tab-copy > span { display: block; color: var(--muted); font-size: 14px; line-height: 1.8; }
.tab-arrow { width: 19px; height: 19px; margin-top: 9px; color: var(--line-strong); }
.scenario-tab[aria-selected="true"] .tab-arrow { color: var(--accent-ink); }
.example-shell { min-width: 0; overflow: hidden; border: 1px solid var(--line); border-radius: 18px; background: var(--page); box-shadow: var(--shadow-soft); }
.example-topbar { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 17px 28px; border-bottom: 1px solid var(--line); font-size: 13px; font-weight: 600; }
.example-topbar > span:first-child { min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.crumb { color: var(--muted); font-weight: 400; }
.crumb-divider { margin-inline: 8px; color: var(--line-strong); font-weight: 400; }
.example-label { flex: none; padding: 2px 8px; border: 1px solid var(--line); border-radius: 5px; color: var(--muted); font-size: 12px; font-weight: 400; }
.scenario-panel { display: flex; flex-direction: column; min-height: 492px; }
.thread { display: grid; flex: 1; align-content: start; gap: 18px; padding: 26px 28px 24px; font-size: 14px; }
.said { justify-self: end; max-width: 84%; margin: 0; padding: 10px 15px; border-radius: 16px; background: var(--bubble); line-height: 1.75; }
.process { display: grid; gap: 8px; }
.fold { display: inline-flex; align-items: center; gap: 6px; margin: 0; color: var(--muted); font-size: 13px; }
.fold .icon { width: 14px; height: 14px; }
.steps { display: grid; gap: 7px; padding-left: 20px; }
.steps li { display: flex; align-items: center; gap: 9px; color: var(--muted); font-size: 13px; }
.steps .icon { width: 15px; height: 15px; }
.reply { margin: 0; line-height: 1.85; }
.results { padding: 13px 16px 14px; border: 1px solid var(--line); border-radius: 12px; background: var(--card); }
.results-title { margin: 0 0 9px; color: var(--muted); font-size: 12px; }
.results-file { display: flex; align-items: center; gap: 9px; }
.results-file .icon { width: 17px; height: 17px; color: var(--muted); }
.results-file > span:not(.results-action) { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.results-action { flex: none; padding: 2px 8px; border-radius: 6px; color: var(--muted); font-size: 12px; }
.task-card { padding: 16px 18px; border: 1px solid var(--line); border-radius: 12px; background: var(--card); }
.task-head { display: flex; align-items: center; gap: 7px; color: var(--muted); font-size: 12px; }
.task-head .icon { width: 14px; height: 14px; }
.task-switch { position: relative; width: 30px; height: 18px; flex: none; margin-left: auto; border-radius: 9px; background: var(--accent); }
.task-switch::after { content: ""; position: absolute; top: 2px; right: 2px; width: 14px; height: 14px; border-radius: 50%; background: #fff; }
.task-name { margin: 9px 0 13px; font-size: 15px; font-weight: 600; }
.task-facts { display: grid; grid-template-columns: repeat(3, auto); justify-content: start; gap: 8px 32px; }
.task-facts dt { color: var(--muted); font-size: 12px; }
.task-facts dd { font-size: 14px; }
.task-actions { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 16px; }
.task-actions span, .approval-actions span { padding: 5px 14px; border: 1px solid var(--line); border-radius: 8px; font-size: 13px; white-space: nowrap; }
.mode-menu { justify-self: start; width: min(330px, 100%); padding: 7px; border: 1px solid var(--line); border-radius: 12px; background: var(--card); box-shadow: var(--shadow-soft); }
.mode-menu-title { margin: 0; padding: 5px 9px 7px; color: var(--muted); font-size: 12px; }
.mode-option { display: flex; align-items: flex-start; gap: 9px; padding: 8px 9px; border-radius: 6px; }
.mode-option.is-checked { background: var(--selected); }
.mode-option .icon, .mode-blank { width: 15px; height: 15px; flex: none; margin-top: 3px; }
.mode-option strong { display: block; font-size: 14px; font-weight: 600; line-height: 1.5; }
.mode-option div > span { display: block; color: var(--muted); font-size: 12px; line-height: 1.6; }
.approval { display: grid; gap: 10px; padding: 16px 18px; border: 1px solid var(--line); border-radius: 12px; background: var(--card); }
.approval-title { margin: 0; font-weight: 650; }
.approval-prompt { margin: 0; line-height: 1.75; }
.approval-actions { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 4px; }
.approval-actions .is-primary { border-color: var(--accent); background: var(--accent); color: #fff; }
.answer-takeaway { display: flex; align-items: flex-start; gap: 9px; margin: 0 28px; padding: 16px 0 4px; border-top: 1px solid var(--line); color: var(--muted); font-size: 13px; line-height: 1.8; }
.answer-takeaway .icon { width: 16px; height: 16px; margin-top: 4px; color: var(--accent-ink); }
.example-footnote { margin: 0; padding: 14px 28px 22px; color: var(--muted); font-size: 12px; }

/* 02 功能 */
.features { border-bottom: 1px solid var(--line); }
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.feature-card { display: flex; flex-direction: column; align-items: flex-start; padding: 30px 28px 26px; border: 1px solid var(--line); border-radius: 16px; background: var(--card); transition: border-color .2s; }
.feature-card:hover { border-color: var(--line-strong); }
.feature-icon { display: grid; place-items: center; width: 46px; height: 46px; margin-bottom: 22px; border-radius: 12px; color: var(--accent-ink); background: var(--accent-soft); }
.feature-card h3 { margin-bottom: 10px; font-size: 20px; letter-spacing: -.03em; }
.feature-card p { flex: 1; margin-bottom: 20px; color: var(--muted); font-size: 15px; line-height: 1.85; }
.feature-tag { display: inline-flex; align-items: center; gap: 8px; color: var(--muted); font-size: 12px; }
.feature-tag::before, .principle-keyword::before { content: ""; width: 4px; height: 4px; border: 1px solid currentColor; transform: rotate(45deg); }

/* 03 我的电脑 */
.remote { border-bottom: 1px solid var(--line); background: var(--band); }
.remote-grid { display: grid; grid-template-columns: 1fr 1fr; align-items: center; gap: 72px; }
.remote-copy { min-width: 0; }
.remote-copy .eyebrow { margin-bottom: 20px; }
.remote-lede { margin: 22px 0 34px; color: var(--muted); font-size: 15px; line-height: 1.9; }
.remote-points { display: grid; gap: 24px; }
.remote-points li { display: flex; align-items: flex-start; gap: 16px; }
.remote-icon { display: grid; place-items: center; width: 40px; height: 40px; flex: none; border-radius: 10px; color: var(--accent-ink); background: var(--accent-soft); }
.remote-icon .icon { width: 21px; height: 21px; }
.remote-points h3 { margin-bottom: 5px; font-size: 17px; letter-spacing: -.02em; }
.remote-points p { margin: 0; color: var(--muted); font-size: 14px; line-height: 1.85; }
.remote-art { position: relative; height: 476px; min-width: 0; font-size: 13px; line-height: 1.5; }
.remote-art::before { content: ""; position: absolute; top: 70px; right: -24px; bottom: 26px; left: 22%; border-radius: 28px; background: var(--lilac); }
.app-window.remote-desktop { position: absolute; top: 0; left: 0; width: 80%; height: 316px; grid-template-columns: 164px minmax(0, 1fr); box-shadow: var(--shadow-soft); }
.remote-desktop-main { justify-content: flex-start; gap: 13px; padding: 54px 22px 0; }
.bone { width: 68%; height: 10px; flex: none; border-radius: 5px; background: var(--selected); }
.bone:nth-child(1) { align-self: flex-end; width: 48%; height: 28px; margin-bottom: 8px; border-radius: 14px; background: var(--bubble); }
.bone:nth-child(3) { width: 56%; }
.bone:nth-child(4) { width: 62%; }
.remote-badge { position: absolute; z-index: 2; left: 4%; bottom: 68px; display: inline-flex; align-items: center; gap: 8px; padding: 8px 15px; border: 1px solid var(--line); border-radius: 99px; background: var(--card); box-shadow: var(--shadow-soft); font-size: 13px; font-weight: 500; white-space: nowrap; }
.remote-badge .icon { width: 16px; height: 16px; color: var(--accent-ink); }
.phone { position: absolute; z-index: 1; right: 3%; bottom: 0; display: flex; flex-direction: column; width: 236px; height: 424px; overflow: hidden; border: 7px solid var(--frame); border-radius: 36px; background: var(--page); box-shadow: var(--shadow); }
.phone-notch { width: 64px; height: 6px; flex: none; margin: 10px auto 8px; border-radius: 3px; background: var(--line-strong); }
.phone-head { display: flex; align-items: center; gap: 7px; flex: none; padding: 8px 14px 12px; border-bottom: 1px solid var(--line); font-weight: 650; }
.phone-head .icon { width: 16px; height: 16px; }
.phone-computer { min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.phone-head .phone-chevron { width: 13px; height: 13px; margin-right: auto; color: var(--faint); }
.phone-head .phone-tool { color: var(--faint); }
.phone-new { flex: none; margin: 8px 8px 0; background: var(--selected); }
.phone-foot { flex: none; margin-top: auto; padding: 12px 16px 16px; border-top: 1px solid var(--line); color: var(--faint); font-size: 12px; }

/* 04 放在哪里 */
.local { border-bottom: 1px solid var(--line); }
.principles-grid { display: grid; grid-template-columns: repeat(3, 1fr); margin-top: 56px; }
.principle { padding-right: 40px; }
.principle + .principle { padding-left: 40px; border-left: 1px solid var(--line); }
.principle:last-child { padding-right: 0; }
.principle-number { color: var(--accent-ink); font-size: 13px; }
.principle h3 { margin: 22px 0 14px; font-size: 22px; letter-spacing: -.04em; }
.principle p { max-width: 310px; margin-bottom: 26px; color: var(--muted); font-size: 15px; line-height: 1.95; }
.principle-keyword { display: inline-flex; align-items: center; gap: 9px; color: var(--muted); font-size: 12px; }

/* 获取 LoboOS */
.get-loboos { background: var(--band); }
.access-panel { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; padding: 58px 60px; border: 1px solid var(--panel-line); border-radius: 22px; background: var(--panel); color: var(--panel-ink); }
.access-intro .eyebrow { color: var(--panel-accent); font-size: 12px; }
.access-intro .small-line { background: var(--panel-accent); }
.access-intro h2 { margin-bottom: 20px; font-size: 31px; line-height: 1.55; }
.access-intro > p:not(.eyebrow) { margin-bottom: 12px; color: var(--panel-muted); font-size: 14px; line-height: 1.9; }
.access-intro > p:last-of-type { margin-bottom: 30px; }
.access-signature { display: flex; align-items: center; gap: 13px; }
.access-signature img { width: 46px; height: 46px; }
.access-signature > span { color: var(--panel-muted); font-size: 13px; }
.signature-dot { margin-inline: 6px; }
.access-options { display: grid; align-content: center; }
.access-option { display: grid; grid-template-columns: 24px 1fr auto; align-items: center; gap: 20px; padding-block: 26px; border-bottom: 1px solid var(--panel-line); }
.access-option:first-child { padding-top: 0; }
.access-option:last-child { padding-bottom: 0; border-bottom: 0; }
.access-option > .icon { color: var(--panel-accent); }
.access-option h3 { margin-bottom: 5px; font-size: 16px; }
.access-option p { margin-bottom: 0; color: var(--panel-muted); font-size: 12px; }
.coming-soon { padding: 5px 11px; border: 1px solid var(--panel-line); border-radius: 99px; color: var(--panel-muted); font-size: 12px; white-space: nowrap; }

/* 页脚 */
.site-footer { padding-block: 32px; border-top: 1px solid var(--line); }
.footer-inner { display: flex; align-items: center; gap: 30px; }
.footer-brand img { width: 32px; height: 32px; }
.footer-brand .brand-name { font-size: 18px; }
.footer-inner > p { margin-bottom: 0; color: var(--muted); font-size: 13px; }
.copyright { margin-left: auto; color: var(--muted); font-size: 12px; }
.back-to-top { display: grid; place-items: center; width: 38px; height: 38px; border: 1px solid var(--line-strong); border-radius: 50%; }
.back-to-top:hover { color: var(--accent-ink); border-color: var(--accent-ink); }

@media (min-width: 1600px) {
  .hero-grid { min-height: 680px; gap: 64px; padding-block: 64px 76px; }
  .hero-art .app-window { height: 424px; }
}
@media (max-width: 1100px) {
  .container { width: calc(100% - 64px); }
  .site-nav { gap: 24px; }
  .hero-grid { gap: 32px; min-height: 580px; }
  .hero-art { padding: 34px 0 44px 26px; }
  .hero-stage { left: 96px; right: -16px; }
  .hero-art .app-window { grid-template-columns: 150px minmax(0, 1fr); height: 384px; }
  .hero-art .app-main { padding-inline: 18px; }
  .scenario-layout { gap: 36px; grid-template-columns: .85fr 1.15fr; }
  .scenario-tab { padding: 24px 15px; gap: 10px; }
  .tab-arrow { display: none; }
  .feature-card { padding: 26px 22px 22px; }
  .remote-grid { gap: 44px; }
  .principle { padding-right: 26px; }
  .principle + .principle { padding-left: 26px; }
  .access-panel { padding: 45px 36px; gap: 38px; }
  .access-intro h2 { font-size: 27px; }
  .access-option { gap: 14px; }
}
@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; gap: 44px; min-height: 0; padding-block: 44px 48px; }
  .hero h1 { font-size: clamp(32px, 6.4vw, 46px); }
  .hero-lede { max-width: 560px; }
  .hero-art { max-width: 660px; padding: 34px 0 44px 30px; }
  .hero-stage { left: 110px; right: 0; }
  .hero-art .app-window { grid-template-columns: 172px minmax(0, 1fr); height: 396px; }
  .remote-grid { grid-template-columns: 1fr; gap: 52px; }
  .remote-art { width: min(520px, 100%); margin-inline: auto; }
  .remote-art::before { right: 0; }
  .feature-grid { grid-template-columns: repeat(2, 1fr); gap: 14px; }
}
@media (max-width: 800px) {
  .section-space { padding-block: 80px; }
  .section-heading { gap: 22px; }
  h2 { font-size: 29px; }
  .section-description { font-size: 14px; }
  .scenario-layout { grid-template-columns: 1fr; gap: 26px; }
  .scenario-tabs { grid-template-columns: repeat(3, 1fr); gap: 8px; padding-top: 0; }
  .scenario-tab { padding: 17px 10px; justify-content: center; align-items: center; gap: 8px; }
  .scenario-icon { width: 26px; height: 26px; margin: 0; }
  .scenario-icon .icon { width: 22px; height: 22px; }
  .scenario-tab-copy { flex: initial; }
  .scenario-tab-copy > strong { margin: 0; font-size: 16px; }
  .scenario-tab-copy > span { display: none; }
  .feature-card h3 { font-size: 18px; }
  .feature-card p { font-size: 14px; }
  .principle h3 { font-size: 20px; }
  .principle p { font-size: 14px; }
  .principle { padding-right: 20px; }
  .principle + .principle { padding-left: 20px; }
  .access-panel { grid-template-columns: 1fr; gap: 42px; }
  .access-intro h2 { font-size: 29px; }
  .access-signature { display: none; }
  .access-intro > p:last-of-type { margin-bottom: 0; }
  .access-option { padding-block: 22px; }
  .access-option p { font-size: 13px; }
  .footer-inner { gap: 22px; flex-wrap: wrap; }
}
/* 导航在 760px 以下折叠，script.js 里是同一个数 */
@media (max-width: 760px) {
  .header-inner { min-height: 72px; gap: 16px; }
  .menu-toggle { display: flex; }
  .site-nav { position: absolute; top: 100%; left: 0; right: 0; display: none; padding: 12px 32px 24px; border-bottom: 1px solid var(--line); background: var(--page); box-shadow: 0 16px 24px rgb(40 44 36 / 8%); }
  .site-nav.is-open { display: grid; gap: 0; }
  .site-nav > a { display: block; padding: 17px 0; border-bottom: 1px solid var(--line); }
  .site-nav .nav-cta { display: flex; margin-top: 18px; padding-block: 11px; border: 1px solid var(--line-strong); }
}
@media (max-width: 620px) {
  html { scroll-padding-top: 90px; }
  .container { width: calc(100% - 40px); }
  .site-nav { padding-inline: 20px; }
  .brand img { width: 36px; height: 36px; }
  .brand-name { font-size: 20px; }
  .hero-grid { gap: 34px; padding-block: 36px 34px; }
  .hero .eyebrow { margin-bottom: 20px; font-size: 12px; letter-spacing: .04em; gap: 10px; }
  .hero h1 { margin-bottom: 20px; font-size: clamp(26px, 7.8vw, 40px); line-height: 1.45; }
  .hero-lede { margin-bottom: 24px; font-size: 15px; }
  .hero-actions { gap: 19px; }
  .button { min-height: 50px; padding: 12px 19px; gap: 13px; font-size: 14px; }
  .hero-actions .text-link { font-size: 13px; gap: 6px; }
  .availability-note { flex-wrap: wrap; row-gap: 2px; margin-top: 18px; }
  .note-divider { display: none; }
  .note-platforms { flex-basis: 100%; padding-left: 13px; }
  .hero-art { padding: 26px 0 50px 16px; }
  .hero-stage { left: 56px; right: -20px; border-radius: 22px 0 0 22px; }
  .hero-art .app-window { grid-template-columns: minmax(0, 1fr); height: 268px; border-radius: 12px; }
  .hero-art .app-sidebar { display: none; }
  .hero-art .app-main { gap: 16px; padding: 18px 16px 34px; }
  .hero-art .app-hero-title { font-size: 19px; }
  .toast { bottom: 12px; padding: 11px 13px; border-radius: 12px; }
  .hero-footer { padding-block: 18px; gap: 12px; font-size: 12px; }
  .hero-footer > a { gap: 8px; }
  .section-space { padding-block: 64px; }
  .section-heading { display: block; margin-bottom: 29px; }
  .section-heading .eyebrow { margin-bottom: 16px; font-size: 12px; }
  h2 { font-size: clamp(24px, 6.8vw, 32px); line-height: 1.5; }
  .section-description { margin: 18px 0 0; font-size: 14px; }
  .section-description br { display: none; }
  .scenario-layout { gap: 19px; }
  .scenario-tabs { gap: 4px; }
  .scenario-tab { flex-direction: column; padding: 13px 4px 12px; gap: 6px; border-radius: 10px; }
  .scenario-tab-copy > strong { font-size: 13px; white-space: nowrap; }
  .scenario-icon { width: 22px; height: 22px; }
  .scenario-icon .icon { width: 20px; height: 20px; }
  .example-shell { border-radius: 13px; }
  .example-topbar { gap: 8px; padding: 14px 17px; font-size: 12px; }
  .example-label { padding: 1px 6px; }
  .scenario-panel { min-height: 520px; }
  .thread { gap: 16px; padding: 20px 17px 20px; }
  .said { max-width: 92%; }
  .task-facts { grid-template-columns: repeat(2, auto); gap: 10px 28px; }
  .answer-takeaway { margin-inline: 17px; font-size: 12px; }
  .example-footnote { padding: 12px 17px 20px; line-height: 1.8; }
  .feature-grid { grid-template-columns: 1fr; gap: 12px; }
  .feature-card { display: grid; grid-template-columns: 40px 1fr; column-gap: 14px; padding: 20px 18px; border-radius: 13px; }
  .feature-icon { grid-row: span 3; width: 40px; height: 40px; margin: 0; border-radius: 10px; }
  .feature-icon .icon { width: 21px; height: 21px; }
  .feature-card h3 { margin-bottom: 6px; font-size: 17px; }
  .feature-card p { margin-bottom: 10px; }
  .remote-grid { gap: 44px; }
  .remote-lede { margin: 18px 0 28px; font-size: 14px; }
  .remote-points { gap: 22px; }
  .remote-points li { gap: 14px; }
  .remote-points h3 { font-size: 16px; }
  .remote-art { height: 430px; font-size: 12px; }
  .remote-art::before { top: 52px; right: -20px; left: 18%; border-radius: 22px 0 0 22px; }
  .app-window.remote-desktop { width: 86%; height: 264px; grid-template-columns: 132px minmax(0, 1fr); }
  .remote-desktop-main { padding: 48px 14px 0; }
  .remote-badge { left: 0; bottom: 56px; padding: 7px 12px; font-size: 12px; }
  .phone { right: 0; width: 204px; height: 384px; border-width: 6px; border-radius: 32px; }
  .principles-grid { grid-template-columns: 1fr; margin-top: 32px; }
  .principle, .principle + .principle { display: grid; grid-template-columns: 38px 1fr; column-gap: 13px; padding: 25px 0; border: 0; border-top: 1px solid var(--line); }
  .principle-number { padding-top: 3px; font-size: 12px; }
  .principle h3 { margin: 0 0 12px; font-size: 19px; }
  .principle p { grid-column: 2; max-width: none; margin-bottom: 14px; font-size: 14px; }
  .principle-keyword { grid-column: 2; }
  .access-panel { width: calc(100% - 32px); padding: 35px 23px; gap: 34px; border-radius: 16px; }
  .access-intro h2 { font-size: clamp(23px, 6.4vw, 30px); }
  .access-intro .eyebrow { margin-bottom: 20px; letter-spacing: .04em; }
  .access-option { grid-template-columns: 21px 1fr auto; gap: 12px; }
  .access-option > .icon { width: 21px; height: 21px; }
  .access-option h3 { font-size: 15px; }
  .access-option p { font-size: 12px; }
  .coming-soon { padding: 4px 8px; }
  .site-footer { padding-block: 25px; }
  .footer-inner { display: grid; grid-template-columns: 1fr auto; gap: 14px; }
  .footer-brand { grid-row: 1; }
  .footer-inner > p { grid-column: 1; grid-row: 2; font-size: 12px; }
  .copyright { grid-column: 1; margin: 0; }
  .back-to-top { grid-row: 1; grid-column: 2; }
}
@media (max-width: 360px) {
  .container { width: calc(100% - 32px); }
  .site-nav { padding-inline: 16px; }
  .hero h1 { font-size: 24px; }
  .hero-actions { gap: 10px; }
  .button { padding-inline: 15px; gap: 8px; }
  .hero-actions .text-link { font-size: 12px; }
  .hero-stage { right: -16px; }
  .remote-art::before { right: -16px; }
  .app-window.remote-desktop { grid-template-columns: 112px minmax(0, 1fr); }
  .phone { width: 180px; }
  .phone-head { gap: 5px; padding-inline: 10px; }
  .phone-head .phone-chevron { display: none; }
  .phone-head .phone-computer { margin-right: auto; }
  .remote-badge { bottom: 40px; }
  .access-panel { padding-inline: 18px; }
  .access-option { gap: 9px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; animation: none !important; }
}