/* =========================================================
   /assets/site.css — 大发168安装指南 全站共享样式
   夜间控制台 + 编辑部版式：深海蓝基底 / 炽热橙主强调 / 电光青副强调
   ========================================================= */

/* ---------- 1. Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body, h1, h2, h3, h4, h5, p, ul, ol, li, figure, blockquote, dl, dd, table { margin: 0; }
ul, ol { padding: 0; list-style: none; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; padding: 0; cursor: pointer; }
img, svg, video, picture { display: block; max-width: 100%; }
table { border-collapse: collapse; }
:focus-visible { outline: 3px solid var(--cyan); outline-offset: 3px; }

/* ---------- 2. Tokens ---------- */
:root {
  --ink: #0B1B33;
  --ink-2: #12263F;
  --ink-3: #0E2038;
  --orange: #FF6A2B;
  --cyan: #22D3EE;
  --gold: #E8B04B;
  --mist: #8C99AD;
  --rock: #2B3446;
  --moss: #7FA88A;
  --clay: #C96B4A;
  --paper: #F2EFE6;
  --body-soft: #D7DEE9;

  --rail-w: 240px;
  --rail-w-md: 208px;
  --topbar-h: 64px;
  --maxw: 1280px;

  --shadow: 6px 6px 0 rgba(0, 0, 0, 0.45);
  --shadow-hard: 6px 6px 0 rgba(0, 0, 0, 0.6);

  --mono: ui-monospace, "JetBrains Mono", "IBM Plex Mono", SFMono-Regular, Menlo, Consolas, monospace;
  --sans: "PingFang SC", "HarmonyOS Sans SC", "Source Han Sans SC", "Noto Sans SC", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", sans-serif;

  --ease: cubic-bezier(0.2, 0.7, 0.3, 1);
  --dur: 220ms;
}

/* ---------- 3. 基础排版 ---------- */
body {
  min-height: 100vh;
  overflow-x: hidden;
  background-color: var(--ink);
  background-image:
    linear-gradient(rgba(140, 153, 173, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(140, 153, 173, 0.06) 1px, transparent 1px),
    radial-gradient(1100px 520px at 88% -12%, rgba(34, 211, 238, 0.10), transparent 62%),
    radial-gradient(880px 460px at 4% 108%, rgba(255, 106, 43, 0.10), transparent 62%);
  background-size: 24px 24px, 24px 24px, 100% 100%, 100% 100%;
  background-attachment: fixed;
  color: var(--paper);
  font-family: var(--sans);
  font-size: 16.5px;
  font-weight: 400;
  line-height: 1.75;
  letter-spacing: 0.005em;
}

h1, h2, h3, h4 {
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.22;
  color: #FFFFFF;
}
h1 { font-size: clamp(1.9rem, 4.6vw, 2.9rem); }
h2 { font-size: clamp(1.45rem, 2.8vw, 2.125rem); }
h3 { font-size: 1.25rem; }
h4 { font-size: 1.0625rem; }
p { max-width: 34em; }
strong { font-weight: 800; }

.mono { font-family: var(--mono); letter-spacing: 0.04em; font-variant-numeric: tabular-nums; }
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

.eyebrow {
  display: flex; align-items: center; gap: 8px;
  font-family: var(--mono); font-size: 11px; letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--cyan);
}
.eyebrow::before { content: ""; width: 16px; height: 2px; background: var(--orange); flex: 0 0 auto; }

.display {
  font-family: var(--sans);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 0.9;
  font-size: clamp(4rem, 12vw, 11rem);
  color: var(--paper);
}
.lede { font-size: 17px; line-height: 1.75; color: var(--body-soft); max-width: 34em; }
.prose { max-width: 34em; font-size: 17px; line-height: 1.75; color: #E3E7EE; }
.prose p + p { margin-top: 1em; }
.prose h2, .prose h3 { margin: 1.6em 0 0.5em; }
.prose ul { margin: 0.8em 0; display: flex; flex-direction: column; gap: 6px; }
.prose li { padding-left: 18px; position: relative; }
.prose li::before { content: ""; position: absolute; left: 0; top: 0.85em; width: 8px; height: 2px; background: var(--orange); }
.prose a { color: var(--cyan); border-bottom: 1px solid rgba(34, 211, 238, 0.4); }
.prose a:hover { border-bottom-color: var(--cyan); }

/* ---------- 4. 布局骨架 ---------- */
.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 18px; }
.section { padding: clamp(36px, 6vw, 64px) 0; border-top: 2px solid var(--rock); }
.section--first { border-top: 0; }

.grid { display: grid; gap: 20px; }
.grid--7-5 { grid-template-columns: 1fr; }
.grid--8-4 { grid-template-columns: 1fr; }
.grid--auto { grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
@media (min-width: 900px) {
  .grid--7-5 { grid-template-columns: 7fr 5fr; gap: 28px; }
  .grid--8-4 { grid-template-columns: 8fr 4fr; gap: 28px; }
}

/* ---------- 5. 组件 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 11px 16px;
  border: 2px solid var(--orange);
  background: var(--orange);
  color: #1B0B02;
  font-weight: 800; font-size: 14px; letter-spacing: 0.04em;
  box-shadow: 6px 6px 0 rgba(0, 0, 0, 0.5);
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease),
              background-color var(--dur) var(--ease), border-color var(--dur) var(--ease),
              color var(--dur) var(--ease);
}
.btn:hover { transform: translate(-2px, -2px); box-shadow: 8px 8px 0 rgba(0, 0, 0, 0.5); }
.btn:active { transform: translate(0, 0); box-shadow: 2px 2px 0 rgba(0, 0, 0, 0.5); }
.btn--primary { background: var(--orange); border-color: var(--orange); color: #1B0B02; }
.btn--cyan { background: var(--cyan); border-color: var(--cyan); color: #04202A; }
.btn--ghost { background: transparent; border-color: var(--rock); color: var(--paper); box-shadow: 6px 6px 0 rgba(0, 0, 0, 0.35); }
.btn--ghost:hover { border-color: var(--cyan); color: var(--cyan); }

.card {
  position: relative;
  padding: 20px;
  background: var(--ink-2);
  border: 2px solid var(--rock);
  box-shadow: var(--shadow);
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.card:hover { transform: translate(-2px, -2px); border-color: var(--cyan); }
.card--offset { margin-top: 0; }
@media (min-width: 768px) { .card--offset { margin-top: 34px; } }

.panel { padding: 22px; background: rgba(18, 38, 63, 0.72); border: 2px solid var(--rock); }
.panel--accent { border-left: 6px solid var(--orange); }

.badge {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 3px 8px;
  font-family: var(--mono); font-size: 11px; letter-spacing: 0.08em;
  border: 2px solid var(--mist); color: var(--mist);
}
.badge--gold { border-color: var(--gold); color: var(--gold); }
.badge--cyan { border-color: var(--cyan); color: var(--cyan); }
.badge--moss { border-color: var(--moss); color: var(--moss); }
.badge--clay { border-color: var(--clay); color: var(--clay); }

.status {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--mono); font-size: 12px; letter-spacing: 0.04em; color: var(--mist);
}
.status__dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--moss);
  box-shadow: 0 0 0 3px rgba(127, 168, 138, 0.18);
  animation: signal 2.6s ease-in-out infinite;
}
.status--info .status__dot { background: var(--cyan); box-shadow: 0 0 0 3px rgba(34, 211, 238, 0.18); }
.status--warn .status__dot { background: var(--clay); box-shadow: 0 0 0 3px rgba(201, 107, 74, 0.18); }
@keyframes signal {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.35; }
}

.spec { width: 100%; font-family: var(--mono); font-size: 13px; letter-spacing: 0.04em; }
.spec th, .spec td { padding: 10px 12px; border-bottom: 1px solid var(--rock); text-align: left; }
.spec thead th { color: var(--gold); font-weight: 500; letter-spacing: 0.08em; border-bottom: 2px solid var(--rock); }
.spec td:last-child, .spec th:last-child { text-align: right; color: var(--gold); }

.breadcrumb {
  display: flex; flex-wrap: wrap; align-items: center; gap: 8px;
  padding: 14px 0;
  font-family: var(--mono); font-size: 12px; letter-spacing: 0.04em; color: var(--mist);
}
.breadcrumb a { color: var(--cyan); }
.breadcrumb a:hover { color: var(--orange); }
.breadcrumb__sep { color: var(--rock); }

/* 图片容器：页面阶段直接放 <img> / <picture> 或 .media-frame--ph 占位 */
.media-frame {
  position: relative;
  overflow: hidden;
  border: 2px solid var(--rock);
  background: var(--ink-2);
  box-shadow: var(--shadow);
}
.media-frame img { width: 100%; height: 100%; object-fit: cover; }
.media-frame--16-9 { aspect-ratio: 16 / 9; }
.media-frame--4-3 { aspect-ratio: 4 / 3; }
.media-frame--1-1 { aspect-ratio: 1 / 1; }
.media-frame--wide { aspect-ratio: 21 / 9; }
.media-frame--ph {
  background-color: var(--ink-3);
  background-image:
    linear-gradient(rgba(34, 211, 238, 0.10) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 106, 43, 0.10) 1px, transparent 1px);
  background-size: 8px 8px, 24px 24px;
}
.media-frame__tag {
  position: absolute; top: 10px; left: 10px; z-index: 2;
  padding: 2px 8px;
  font-family: var(--mono); font-size: 11px; letter-spacing: 0.08em;
  color: var(--gold); background: rgba(11, 27, 51, 0.86); border: 2px solid var(--rock);
}
.media-frame__cap {
  padding: 8px 10px;
  border-top: 1px solid var(--rock);
  font-family: var(--mono); font-size: 11px; letter-spacing: 0.04em; color: var(--mist);
}

/* 分段控件（可访问标签页） */
.seg { width: 100%; }
.seg__list {
  display: flex; flex-wrap: wrap; gap: 8px;
  padding-bottom: 12px; border-bottom: 2px solid var(--rock);
}
.seg__btn {
  padding: 8px 14px;
  border: 2px solid var(--rock);
  background: var(--ink-2);
  color: var(--mist);
  font-family: var(--mono); font-size: 12px; letter-spacing: 0.06em;
  transition: transform var(--dur) var(--ease), color var(--dur) var(--ease),
              border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}
.seg__btn:hover { color: var(--cyan); border-color: var(--cyan); transform: translateY(-2px); }
.seg__btn[aria-selected="true"] {
  color: #04202A; background: var(--cyan); border-color: var(--cyan);
  box-shadow: 4px 4px 0 rgba(0, 0, 0, 0.45);
}
.seg__panel { padding-top: 18px; }
.seg__panel[hidden] { display: none; }

/* ---------- 6. 头部 / 侧边轨道导航 ---------- */
.skip-link {
  position: fixed; top: 10px; left: 10px; z-index: 200;
  padding: 10px 14px;
  background: var(--orange); color: #160A02;
  font-weight: 800; font-size: 14px;
  border: 2px solid #000;
  transform: translateY(-180%);
  transition: transform 180ms ease-out;
}
.skip-link:focus { transform: translateY(0); }

.site-header { position: relative; z-index: 80; }

.scroll-progress {
  position: fixed; top: 0; left: 0; right: 0; height: 3px;
  z-index: 95; pointer-events: none;
  background: rgba(43, 52, 70, 0.55);
}
.scroll-progress__bar {
  display: block; height: 100%; width: 0;
  background: linear-gradient(90deg, var(--orange), var(--gold), var(--cyan));
  transition: width 120ms linear;
}

/* 品牌 */
.brand { display: inline-flex; align-items: center; gap: 10px; }
.brand__mark {
  flex: 0 0 auto;
  display: inline-flex; align-items: center; justify-content: center;
  width: 40px; height: 40px;
  border: 2px solid var(--orange);
  color: var(--orange);
  font-family: var(--mono); font-size: 14px; letter-spacing: -0.02em;
  box-shadow: 4px 4px 0 rgba(0, 0, 0, 0.45);
  transition: transform var(--dur) var(--ease), color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.brand:hover .brand__mark { transform: translate(-2px, -2px); color: var(--cyan); border-color: var(--cyan); }
.brand__text { display: flex; flex-direction: column; gap: 2px; min-width: 0; }
.brand__name { font-size: 15px; font-weight: 800; letter-spacing: -0.02em; color: var(--paper); }
.brand__sub { font-family: var(--mono); font-size: 11px; letter-spacing: 0.06em; color: var(--mist); }

/* 顶栏（移动端） */
.topbar { display: none; }
.nav-toggle {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 9px 12px;
  border: 2px solid var(--rock);
  background: var(--ink-2);
  color: var(--paper);
  font-family: var(--mono); font-size: 12px; letter-spacing: 0.08em;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.nav-toggle:hover { border-color: var(--cyan); color: var(--cyan); transform: translateY(-2px); }
.nav-toggle[aria-expanded="true"] { border-color: var(--orange); color: var(--orange); }
.nav-toggle__bars {
  display: block; width: 20px; height: 14px;
  background-image:
    linear-gradient(currentColor, currentColor),
    linear-gradient(currentColor, currentColor),
    linear-gradient(currentColor, currentColor);
  background-repeat: no-repeat;
  background-size: 100% 2px, 100% 2px, 100% 2px;
  background-position: 0 0, 0 50%, 0 100%;
}
.nav-toggle__label { white-space: nowrap; }

/* 侧轨导航 */
.rail-nav__eyebrow { color: var(--mist); font-size: 11px; }
.rail-nav__list { display: flex; flex-direction: column; gap: 4px; }
.rail-nav__item { display: block; }
.rail-nav__link {
  display: flex; align-items: center; gap: 10px;
  padding: 9px 10px;
  border: 2px solid transparent;
  color: var(--paper);
  font-size: 15px; font-weight: 500; letter-spacing: 0.01em;
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease),
              background-color var(--dur) var(--ease), color var(--dur) var(--ease);
}
.rail-nav__link:hover {
  transform: translateX(2px);
  border-color: var(--rock);
  background: var(--ink-2);
  color: #FFFFFF;
}
.rail-nav__link[aria-current="page"] {
  background: var(--ink-2);
  border-color: var(--orange);
  color: #FFFFFF;
  box-shadow: inset 4px 0 0 var(--orange);
}
.rail-nav__link[aria-current="page"] .rail-nav__num { color: var(--orange); }
.rail-nav__num { flex: 0 0 auto; min-width: 22px; font-size: 11px; color: var(--mist); }
.rail-nav__label { min-width: 0; }

.rail-nav__tail { display: flex; flex-direction: column; gap: 8px; }
.rail-nav__util {
  display: block;
  padding: 8px 10px;
  border: 2px solid rgba(34, 211, 238, 0.42);
  color: var(--cyan);
  font-family: var(--mono); font-size: 12px; letter-spacing: 0.05em;
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}
.rail-nav__util:hover { transform: translateX(2px); border-color: var(--cyan); background: rgba(34, 211, 238, 0.08); }
.rail-nav__cta { width: 100%; }
.rail-nav__note { font-size: 12px; line-height: 1.6; color: var(--mist); max-width: none; }

/* 遮罩 */
.nav-scrim {
  position: fixed; inset: 0;
  z-index: 75;
  background: rgba(6, 13, 25, 0.74);
  opacity: 0; visibility: hidden;
  transition: opacity 200ms ease-out, visibility 200ms ease-out;
}

/* ---------- 7. 页脚 ---------- */
.site-footer {
  margin-top: clamp(48px, 8vw, 88px);
  border-top: 2px solid var(--orange);
  background-image: linear-gradient(180deg, var(--ink-2), var(--ink) 78%);
  box-shadow: 0 -6px 0 rgba(0, 0, 0, 0.35);
}
.footer__grid {
  display: grid; gap: 26px;
  grid-template-columns: 1fr;
  padding: clamp(32px, 5vw, 48px) 0 26px;
}
@media (min-width: 620px) { .footer__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (min-width: 1024px) {
  .footer__grid { grid-template-columns: 1.5fr 0.85fr 0.85fr 0.8fr 0.9fr; gap: 24px; }
}
.footer__brand { display: flex; flex-direction: column; gap: 14px; }
.footer__intro { font-size: 14px; line-height: 1.7; color: var(--body-soft); max-width: 30em; }
.footer__meta { font-size: 11px; letter-spacing: 0.08em; color: var(--mist); max-width: none; }
.footer__col { min-width: 0; }
.footer__col-title {
  font-family: var(--mono); font-size: 12px; font-weight: 500;
  letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--gold);
  padding-bottom: 8px; margin-bottom: 12px;
  border-bottom: 2px solid var(--rock);
}
.footer__links { display: flex; flex-direction: column; gap: 9px; }
.footer__links a {
  display: inline-block;
  font-size: 14px; color: var(--paper);
  transition: transform var(--dur) var(--ease), color var(--dur) var(--ease);
}
.footer__links a:hover { color: var(--cyan); transform: translateX(2px); }

.footer__contact {
  display: flex; flex-direction: column; gap: 8px;
  padding: 20px 0;
  border-top: 2px solid var(--rock);
  border-bottom: 2px solid var(--rock);
}
.footer__contact-line { font-size: 13px; line-height: 1.8; color: var(--paper); max-width: 62em; }
.footer__note { font-size: 12px; line-height: 1.7; color: var(--mist); max-width: 62em; }

.footer__legal {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 14px;
  padding: 18px 0 26px;
}
.footer__copy { font-size: 12px; color: var(--mist); max-width: none; }

.to-top {
  padding: 8px 12px;
  border: 2px solid var(--rock);
  background: var(--ink-2);
  color: var(--paper);
  font-family: var(--mono); font-size: 12px; letter-spacing: 0.06em;
  box-shadow: 4px 4px 0 rgba(0, 0, 0, 0.5);
  transition: transform var(--dur) var(--ease), color var(--dur) var(--ease),
              border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.to-top:hover { border-color: var(--cyan); color: var(--cyan); transform: translate(-2px, -2px); box-shadow: 6px 6px 0 rgba(0, 0, 0, 0.5); }

/* ---------- 8. 渐显 ---------- */
[data-reveal] {
  transition: opacity 260ms ease-out, transform 260ms ease-out;
}
[data-reveal].is-hidden { opacity: 0; transform: translateY(12px); }
[data-reveal].is-in { opacity: 1; transform: none; }

/* ---------- 9. 移动端 / 平板 ---------- */
@media (max-width: 1023.98px) {
  body { padding-top: var(--topbar-h); background-attachment: scroll; }
  body.nav-open { overflow: hidden; }

  .topbar {
    position: fixed; top: 0; left: 0; right: 0;
    height: var(--topbar-h);
    z-index: 80;
    display: flex; align-items: center; justify-content: space-between; gap: 12px;
    padding: 0 16px;
    background: rgba(11, 27, 51, 0.96);
    border-bottom: 2px solid var(--rock);
    box-shadow: 0 6px 0 rgba(0, 0, 0, 0.35);
  }

  .rail-nav {
    position: fixed; top: 0; bottom: 0; left: 0;
    width: min(84vw, 320px);
    z-index: 82;
    display: flex; flex-direction: column; gap: 18px;
    padding: calc(var(--topbar-h) + 18px) 18px 28px;
    overflow-y: auto;
    background-image: linear-gradient(180deg, var(--ink-2), var(--ink) 70%);
    border-right: 2px solid var(--orange);
    box-shadow: 10px 0 0 rgba(0, 0, 0, 0.4);
    transform: translateX(-104%);
    visibility: hidden;
    transition: transform 240ms var(--ease), visibility 240ms var(--ease);
  }
  .rail-nav[data-open] { transform: translateX(0); visibility: visible; }
  .site-header[data-open] .nav-scrim { opacity: 1; visibility: visible; }

  .rail-nav__list { border-top: 2px solid var(--rock); padding-top: 8px; }
  .rail-nav__link { padding: 11px 10px; }
}

/* ---------- 10. 桌面端 ---------- */
@media (min-width: 1024px) {
  body { padding-left: var(--rail-w-md); }
  .site-header { position: fixed; top: 0; left: 0; bottom: 0; width: var(--rail-w-md); }
  .rail-nav {
    display: flex; flex-direction: column; gap: 18px;
    height: 100%;
    padding: 22px 16px 20px;
    overflow-y: auto;
    background-image: linear-gradient(180deg, var(--ink-2), var(--ink) 62%);
    border-right: 2px solid var(--rock);
    box-shadow: 6px 0 0 rgba(0, 0, 0, 0.35);
  }
  .nav-scrim { display: none; }
  .rail-nav__list { border-top: 2px solid var(--rock); padding-top: 8px; }
  .rail-nav__tail { margin-top: auto; }
}
@media (min-width: 1240px) {
  body { padding-left: var(--rail-w); }
  .site-header { width: var(--rail-w); }
  .rail-nav { padding: 26px 18px 22px; gap: 22px; }
}

/* ---------- 11. 减少动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
  .scroll-progress__bar { transition: none; }
  [data-reveal].is-hidden { opacity: 1; transform: none; }
  .btn:hover, .card:hover, .rail-nav__link:hover, .to-top:hover, .brand:hover .brand__mark { transform: none; }
}