/* 基础排版、公共导航和页面容器。 */
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--paper); font-family: "Segoe UI", "Microsoft YaHei", sans-serif; line-height: 1.6; }
a { color: inherit; text-decoration: none; }
/* Custom controls own their surfaces; keep native select arrows and file pickers. */
:where(button, textarea, input:not([type]), input[type="text"], input[type="search"], input[type="number"], input[type="email"], input[type="password"], input[type="tel"], input[type="url"]) { -webkit-appearance: none; appearance: none; }
:where(textarea, input:not([type]), input[type="text"], input[type="search"], input[type="number"], input[type="email"], input[type="password"], input[type="tel"], input[type="url"]) { box-shadow: none; }
/* Quiet native tap feedback without changing scrolling or pinch zoom. */
:where(a[href], button, summary, label, input, select, textarea, [role="button"], [role="tab"]) { -webkit-tap-highlight-color: transparent; }
:where(a[href], button, summary, label, input, select, textarea, [role="button"], [role="tab"]):not(:where(.leaflet-container, .leaflet-container *)) { touch-action: manipulation; }
@media (pointer: coarse) {
/* Page-owned fields use this size to avoid small-text focus zoom on iOS. */
:root, body { --ui-field-font-size: 16px; }
}
.shell { width: min(1160px, calc(100% - 48px)); margin: 0 auto; }
.site-header { background: rgba(248, 251, 254, 0.94); border-bottom: 1px solid var(--line); position: sticky; top: 0; z-index: 10; backdrop-filter: blur(12px); }
.nav-wrap { position: relative; min-height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 30px; }
.brand { display: inline-flex; align-items: center; gap: 11px; }
.brand-mark { display: grid; place-items: center; width: 34px; height: 34px; border-radius: 10px; font-weight: 800; font-size: 20px; }
.brand strong { display: block; font-size: 16px; letter-spacing: .04em; }
.brand small { display: block; color: var(--muted); font-size: 8px; letter-spacing: .16em; }
.nav-links { position: absolute; left: 50%; display: flex; gap: 30px; color: var(--muted); font-size: 14px; transform: translateX(-50%); }
.nav-links a { padding: 26px 0 22px; border-bottom: 2px solid transparent; }
.nav-links a:hover, .nav-links a:focus-visible, .nav-links a.active { color: var(--ink); border-color: var(--orange); }
.nav-links a:hover, .nav-links a:focus-visible { transform: translateY(-1px); text-shadow: 0 2px 7px rgba(53, 65, 84, .14); }
.nav-links a:focus-visible { outline: 2px solid #b8d8e9; outline-offset: 5px; }
.github-link { display: inline-flex; align-items: center; gap: 7px; margin-left: auto; color: var(--muted); font-size: 12px; font-weight: 700; transition: color .2s ease, transform .2s ease; }
.github-link:hover, .github-link:focus-visible { color: var(--ink); transform: translateY(-1px); }
.github-link:focus-visible { outline: 2px solid #b8d8e9; outline-offset: 5px; }
.github-icon { width: 17px; height: 17px; fill: currentColor; }
.nav-status { display: flex; align-items: center; gap: 8px; color: var(--muted); font-size: 12px; transition: color .2s ease, filter .2s ease, transform .2s ease, text-shadow .2s ease; }
.nav-status:hover, .nav-status:focus-visible { color: var(--ink); filter: brightness(1.08); transform: scale(1.04); text-shadow: 0 0 10px rgba(131, 181, 152, .38); }
.nav-status:focus-visible { outline: 2px solid #b8d8e9; outline-offset: 3px; }
.nav-status.status-在线 { color: #668f7b; }
.nav-status.status-在线 .status-dot { background: #83b598; box-shadow: 0 0 0 4px #edf6f0; }
.nav-status.status-在线:hover .status-dot, .nav-status.status-在线:focus-visible .status-dot { box-shadow: 0 0 0 4px #edf6f0, 0 0 12px rgba(131, 181, 152, .78); }
.nav-status.status-可能离线 { color: #aa8a4d; }
.nav-status.status-可能离线 .status-dot { background: #d2aa58; box-shadow: 0 0 0 4px #fbf3df; }
.nav-status.status-可能离线:hover .status-dot, .nav-status.status-可能离线:focus-visible .status-dot { box-shadow: 0 0 0 4px #fbf3df, 0 0 12px rgba(210, 170, 88, .68); }
.nav-status.status-离线, .nav-status.status-未连接 { color: #c8794e; }
.nav-status.status-离线 .status-dot, .nav-status.status-未连接 .status-dot { background: #d77b4c; box-shadow: 0 0 0 4px #fbe9dc; }
.nav-status.status-离线:hover .status-dot, .nav-status.status-离线:focus-visible .status-dot, .nav-status.status-未连接:hover .status-dot, .nav-status.status-未连接:focus-visible .status-dot { box-shadow: 0 0 0 4px #fbe9dc, 0 0 12px rgba(215, 123, 76, .68); }
h1, h2, h3, p { margin-top: 0; }
h1 { max-width: 650px; margin-bottom: 24px; font-size: clamp(44px, 5.2vw, 68px); line-height: 1.05; letter-spacing: -.02em; font-weight: 750; }
h2 { margin-bottom: 0; font-size: clamp(30px, 4vw, 48px); line-height: 1.1; letter-spacing: -.02em; }
code { color: #5d82a0; font-family: Consolas, monospace; font-size: 13px; }
.site-footer { padding: 24px 0; color: #c5d0dc; background: var(--dark); font-size: 11px; }
.footer-wrap { display: flex; justify-content: space-between; gap: 20px; }
@media (max-width: 820px) {
.shell { width: min(100% - 32px, 600px); }
.nav-wrap { min-height: 68px; gap: 14px; }
.nav-links { position: static; gap: 16px; transform: none; }
.github-link { margin-left: 0; }
.nav-status { display: none; }
h1 { font-size: clamp(38px, 10vw, 52px); }
.footer-wrap { flex-direction: column; gap: 7px; }
}
@media (max-width: 460px) {
.nav-links { font-size: 12px; }
.github-link span { display: none; }
.github-icon { width: 18px; height: 18px; }
.brand small { display: none; }
}
@media (max-width: 700px) {
.nav-wrap { display: grid; grid-template-columns: 1fr auto; gap: 0 16px; padding-top: 12px; }
.nav-links { position: static; grid-column: 1 / -1; grid-row: 2; justify-content: center; gap: 22px; transform: none; }
.nav-links a { padding-top: 12px; padding-bottom: 12px; }
.github-link { grid-column: 2; grid-row: 1; margin-left: 0; }
.nav-status { display: none; }
}
.brand-mark { color: #65769e; background: linear-gradient(135deg, #dceafb, #e7def5); border: 1px solid #d6dfef; }
body:not(.page-home) .brand-mark { background: linear-gradient(135deg, #dceafb, #e7def5); color: #65769e; }
body:not(.page-home) .nav-status.status-在线 { color: #668b96; }
body:not(.page-home) .nav-status.status-在线 .status-dot { background: var(--ui-online); box-shadow: 0 0 0 4px #edf5f8; }
body:not(.page-home) .site-footer { padding: 20px 0; color: #8b95ad; background: #f8faff; border-top: 1px solid #e1e6f2; }
body:not(.page-home) .site-header { background: #f8faffef; }
body:not(.page-home) .nav-status.status-在线:hover .status-dot, body:not(.page-home) .nav-status.status-在线:focus-visible .status-dot { box-shadow: 0 0 0 4px #edf5f8, 0 0 12px #7fb8c280; }
html { scrollbar-gutter: stable; }
@supports not (scrollbar-gutter: stable) {
body { overflow-y: scroll; }
}
.nav-links a { position: relative; border-bottom-color: transparent; transition: color .2s ease; }
.nav-links a:is(:hover, :focus-visible, .active, .is-pending) { color: var(--ink); border-bottom-color: transparent; transform: none; text-shadow: none; }
.nav-links a::after { position: absolute; right: 0; bottom: -1px; left: 0; height: 2px; content: ""; pointer-events: none; opacity: 0; transform: scaleX(.5); transition: opacity .2s ease, transform .2s ease; }
.nav-links a::after { background: var(--orange); }
.nav-links a:is(:hover, :focus-visible, .active, .is-pending)::after { opacity: 1; transform: scaleX(1); }
.nav-links.is-navigating a.active:not(.is-pending)::after { opacity: 0; transform: scaleX(.5); }
@media (prefers-reduced-motion: reduce) {
.nav-links a, .nav-links a::after { transition: none; }
}