/* ============================================================
   亚虎手机指南 — 共享样式 /assets/site.css
   设计语言：虎纹检测终端 · 深墨底 + 琥珀金 + 仪器状态色
   ============================================================ */

/* ---------- Reset ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; }

body,
h1, h2, h3, h4, h5, h6,
p, figure, blockquote, dl, dd, ul, ol {
  margin: 0;
  padding: 0;
}

ul, ol { list-style: none; }

img, svg, video {
  display: block;
  max-width: 100%;
  height: auto;
}

button, input, select, textarea {
  font: inherit;
  color: inherit;
}

a { color: inherit; text-decoration: none; }

:root {
  /* 色彩 */
  --ink: #0B0D0E;
  --tiger-black: #161A1D;
  --amber: #F2A93B;
  --amber-bright: #FFD48A;
  --signal: #3DD6C4;
  --fault: #FF6B3D;
  --slate: #34424F;
  --mist: #AAB7C4;
  --paper: #F5F0E6;
  --glass: #F5F0E61A;
  --glass-strong: #F5F0E626;
  --hairline: #F5F0E624;
  --hairline-soft: #F5F0E614;

  /* 字体 */
  --font-title: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-mono: "IBM Plex Mono", "JetBrains Mono", "SFMono-Regular", Consolas, monospace;

  /* 尺度 */
  --shell: 1220px;
  --gutter: 24px;
  --radius-pill: 999px;
  --radius-md: 14px;
  --radius-sm: 8px;
  --header-h: 72px;
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  --shadow-lift: 0 10px 30px rgba(0, 0, 0, 0.45);
  --focus-ring: 0 0 0 2px var(--ink), 0 0 0 4px var(--signal);
}

@media (min-width: 768px) {
  :root { --gutter: 32px; --header-h: 80px; }
}

/* ---------- 基础排版 ---------- */
body {
  background-color: var(--ink);
  background-image:
    radial-gradient(1200px 600px at 78% -10%, rgba(242, 169, 59, 0.10), transparent 62%),
    radial-gradient(900px 500px at 5% 8%, rgba(61, 214, 196, 0.06), transparent 60%);
  background-repeat: no-repeat;
  color: var(--paper);
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.55;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
  padding-bottom: 96px; /* 移动端底部浮岛留位 */
}

@media (min-width: 900px) {
  body { padding-bottom: 0; }
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-title);
  font-weight: 900;
  line-height: 1.18;
  letter-spacing: 0.005em;
  transform: scaleX(1.02);
  transform-origin: left center;
}

h1 { font-size: clamp(1.9rem, 4.6vw, 3.2rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2.1rem); }
h3 { font-size: clamp(1.15rem, 2vw, 1.4rem); }

p { max-width: 68ch; }

strong { font-weight: 700; color: var(--amber-bright); }

code, kbd, samp, pre { font-family: var(--font-mono); }

::selection { background: var(--amber); color: var(--ink); }

hr {
  border: 0;
  height: 1px;
  background: var(--hairline);
}

/* ---------- 焦点与跳转 ---------- */
:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
  border-radius: 4px;
}

.skip-link {
  position: absolute;
  top: -200px;
  left: 16px;
  z-index: 200;
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 18px;
  background: var(--amber);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  border-radius: var(--radius-sm);
  transition: top 160ms var(--ease);
}

.skip-link:focus { top: 16px; }

/* ---------- 容器与网格 ---------- */
.site-shell {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.page-main {
  display: block;
  padding-block: 40px 72px;
}

@media (min-width: 900px) {
  .page-main { padding-block: 64px 104px; }
}

.content-wrap {
  width: 100%;
  max-width: 860px;
}

.prose { max-width: 68ch; }
.prose > * + * { margin-top: 1em; }
.prose p { color: var(--mist); }

.grid-12 {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}

.rail-col { min-width: 0; }
.content-col { min-width: 0; }

@media (min-width: 980px) {
  .grid-12 {
    grid-template-columns: repeat(12, minmax(0, 1fr));
    gap: 32px;
  }
  .rail-col { grid-column: span 3; position: sticky; top: calc(var(--header-h) + 72px); align-self: start; }
  .content-col { grid-column: span 9; }
}

.stack > * + * { margin-top: 24px; }
.stack--tight > * + * { margin-top: 12px; }

.cluster {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-serif);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--mist);
}

.section-label::before {
  content: "";
  width: 26px;
  height: 2px;
  background: var(--amber);
  flex: none;
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--amber);
}

/* ---------- 头部：悬浮胶囊浮岛 ---------- */
.site-header-wrap {
  position: sticky;
  top: 0;
  z-index: 120;
  padding-block: 12px 0;
  background: linear-gradient(180deg, rgba(11, 13, 14, 0.92) 0%, rgba(11, 13, 14, 0.55) 70%, rgba(11, 13, 14, 0) 100%);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}

.site-header { position: relative; }

.site-header__inner {
  position: relative;
  display: grid;
  grid-template-columns: auto 1fr auto;
  grid-template-areas: "brand tools toggle";
  align-items: center;
  gap: 14px;
  min-height: var(--header-h);
  padding: 10px 14px;
  background: rgba(22, 26, 29, 0.72);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-pill);
  box-shadow: var(--shadow-lift);
  backdrop-filter: blur(14px) saturate(1.15);
  -webkit-backdrop-filter: blur(14px) saturate(1.15);
}

/* 悬浮胶囊顶部的虎纹刻度 */
.site-header__inner::before {
  content: "";
  position: absolute;
  inset: 6px 22px auto 22px;
  height: 3px;
  border-radius: 3px;
  background: repeating-linear-gradient(
    90deg,
    var(--amber) 0 18px,
    transparent 18px 30px
  );
  opacity: 0.5;
  pointer-events: none;
}

/* 品牌 */
.brand {
  grid-area: brand;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-height: 44px;
  padding-right: 6px;
  border-radius: var(--radius-sm);
}

.brand__mark {
  position: relative;
  display: inline-grid;
  gap: 3px;
  width: 30px;
  height: 30px;
  padding: 5px 4px;
  flex: none;
  background: var(--amber);
  border-radius: 8px;
  overflow: hidden;
}

.brand__stripe {
  display: block;
  height: 4px;
  background: var(--ink);
  border-radius: 2px;
}

.brand__stripe:nth-child(1) { width: 100%; }
.brand__stripe:nth-child(2) { width: 70%; }
.brand__stripe:nth-child(3) { width: 88%; }

.brand__text {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}

.brand__name {
  font-family: var(--font-title);
  font-weight: 900;
  font-size: 0.98rem;
  letter-spacing: 0.02em;
  color: var(--paper);
  white-space: nowrap;
}

.brand__descriptor {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--mist);
  white-space: nowrap;
}

/* 导航 */
.site-nav {
  grid-area: nav;
  min-width: 0;
}

.site-nav__list {
  display: flex;
  align-items: center;
  gap: 2px;
}

.site-nav__link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 12px;
  border-radius: var(--radius-pill);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--mist);
  white-space: nowrap;
  transition: color 160ms var(--ease), background-color 160ms var(--ease);
}

.site-nav__link:hover {
  color: var(--paper);
  background: var(--glass-strong);
}

.site-nav__link[aria-current="page"] {
  background: var(--amber);
  color: var(--ink);
  font-weight: 700;
}

/* 头部工具区 */
.header-tools {
  grid-area: tools;
  display: flex;
  align-items: center;
  gap: 10px;
}

.version-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 34px;
  padding: 0 12px;
  background: var(--glass);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-pill);
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.06em;
  color: var(--paper);
  white-space: nowrap;
}

.version-chip__dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--signal);
  box-shadow: 0 0 0 3px rgba(61, 214, 196, 0.18);
  flex: none;
}

.version-chip__text { line-height: 1; }

/* 移动导航按钮 */
.nav-toggle {
  grid-area: toggle;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 44px;
  min-width: 44px;
  padding: 0 14px;
  background: var(--glass);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-pill);
  color: var(--paper);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  cursor: pointer;
  transition: border-color 160ms var(--ease), background-color 160ms var(--ease);
}

.nav-toggle:hover { border-color: var(--amber); background: var(--glass-strong); }

.nav-toggle__bars {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
  width: 16px;
  height: 16px;
  flex: none;
}

.nav-toggle__bars span {
  display: block;
  height: 2px;
  width: 100%;
  background: var(--amber);
  border-radius: 2px;
  transition: transform 200ms var(--ease), opacity 200ms var(--ease);
}

.nav-toggle__label { line-height: 1; }

/* 桌面：展开为横排，隐藏按钮 */
@media (min-width: 900px) {
  .site-header__inner {
    grid-template-columns: auto 1fr auto;
    grid-template-areas: "brand nav tools";
    padding: 10px 12px 10px 16px;
  }
  .nav-toggle { display: none; }
  .site-nav { justify-self: center; }
  .site-nav__list { gap: 4px; }
}

@media (min-width: 1100px) {
  .site-nav__link { padding: 0 15px; font-size: 0.92rem; }
}

/* 移动：浮岛沉底，导航抽屉 */
@media (max-width: 899px) {
  .site-header-wrap {
    position: fixed;
    inset: auto 0 0 0;
    padding: 0 var(--gutter) calc(10px + env(safe-area-inset-bottom, 0px));
    background: none;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    pointer-events: none;
  }

  .site-header { pointer-events: auto; }

  .site-header__inner {
    grid-template-columns: auto 1fr auto;
    grid-template-areas:
      "brand tools toggle"
      "nav nav nav";
    gap: 10px 12px;
    padding: 10px 12px;
    border-color: var(--hairline);
    background: rgba(22, 26, 29, 0.94);
    box-shadow: 0 -8px 30px rgba(0, 0, 0, 0.6);
  }

  .site-header__inner::before { inset: 4px 18px auto 18px; opacity: 0.35; }

  .brand__descriptor { display: none; }

  .header-tools { justify-self: end; }
  .version-chip { min-height: 30px; padding: 0 10px; font-size: 0.66rem; }
  .header-cta { display: none; }

  .site-nav {
    grid-area: nav;
    display: none;
    width: 100%;
    padding-top: 6px;
    border-top: 1px solid var(--hairline);
  }

  .site-header__inner[data-open="true"] .site-nav { display: block; }

  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
  }

  .site-nav__link {
    width: 100%;
    justify-content: flex-start;
    min-height: 48px;
    padding: 0 16px;
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
  }

  .site-nav__link[aria-current="page"] { border-radius: var(--radius-sm); }

  .skip-link:focus { top: auto; bottom: calc(96px + env(safe-area-inset-bottom, 0px)); }
}

/* 滚动进度条 */
.scroll-progress {
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: -1px;
  height: 2px;
  border-radius: 2px;
  overflow: hidden;
  background: transparent;
  pointer-events: none;
}

.scroll-progress__bar {
  display: block;
  height: 100%;
  width: calc(var(--scroll-progress, 0) * 100%);
  background: linear-gradient(90deg, var(--amber) 0%, var(--amber-bright) 55%, var(--signal) 100%);
  transition: width 90ms linear;
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  padding: 0 22px;
  border: 1px solid transparent;
  border-radius: var(--radius-pill);
  font-family: var(--font-body);
  font-size: 0.92rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  line-height: 1.2;
  text-align: center;
  cursor: pointer;
  transition: transform 160ms var(--ease), background-color 160ms var(--ease),
              border-color 160ms var(--ease), color 160ms var(--ease);
}

.btn--amber {
  background: var(--amber);
  color: var(--ink);
}

.btn--amber:hover {
  background: var(--amber-bright);
  transform: translateY(-2px);
}

.btn--ghost {
  background: var(--glass);
  border-color: var(--hairline);
  color: var(--paper);
}

.btn--ghost:hover {
  border-color: var(--amber);
  color: var(--amber-bright);
  transform: translateY(-2px);
}

.btn--sm {
  min-height: 38px;
  padding: 0 16px;
  font-size: 0.82rem;
}

.btn--block { width: 100%; }

/* ---------- 状态标签 ---------- */
.status-tag {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  min-height: 28px;
  padding: 0 11px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--hairline);
  background: var(--glass);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--mist);
  white-space: nowrap;
}

.status-tag::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
  flex: none;
}

.status-tag--ok { color: var(--signal); border-color: rgba(61, 214, 196, 0.35); background: rgba(61, 214, 196, 0.08); }
.status-tag--warn { color: var(--fault); border-color: rgba(255, 107, 61, 0.38); background: rgba(255, 107, 61, 0.08); }
.status-tag--info { color: var(--amber-bright); border-color: rgba(255, 212, 138, 0.35); background: rgba(242, 169, 59, 0.08); }

/* ---------- 虎纹分隔 ---------- */
.rule-tiger {
  height: 10px;
  width: 100%;
  background:
    repeating-linear-gradient(
      115deg,
      var(--tiger-black) 0 26px,
      var(--amber) 26px 34px,
      var(--tiger-black) 34px 64px,
      rgba(242, 169, 59, 0.35) 64px 70px
    );
  opacity: 0.6;
}

/* ---------- 面包屑 ---------- */
.breadcrumb { margin-bottom: 26px; }

.breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.06em;
  color: var(--mist);
}

.breadcrumb__item { display: inline-flex; align-items: center; gap: 6px; }

.breadcrumb__item + .breadcrumb__item::before {
  content: "/";
  color: var(--slate);
}

.breadcrumb__link {
  min-height: 28px;
  display: inline-flex;
  align-items: center;
  color: var(--mist);
  border-radius: 4px;
  transition: color 140ms var(--ease);
}

.breadcrumb__link:hover { color: var(--amber); }

.breadcrumb__item[aria-current="page"] .breadcrumb__link { color: var(--paper); }

/* ---------- 图片容器基础规则 ---------- */
.media-frame {
  position: relative;
  display: block;
  width: 100%;
  overflow: hidden;
  border-radius: var(--radius-md);
  border: 1px solid var(--hairline);
  background:
    linear-gradient(135deg, rgba(52, 66, 79, 0.55), rgba(22, 26, 29, 0.9)),
    repeating-linear-gradient(135deg, rgba(242, 169, 59, 0.06) 0 12px, transparent 12px 24px);
  aspect-ratio: 4 / 3;
}

.media-frame--wide { aspect-ratio: 16 / 9; }
.media-frame--tall { aspect-ratio: 3 / 4; }

.media-frame__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.media-frame__overlay {
  position: absolute;
  inset: auto 0 0 0;
  padding: 14px 16px;
  background: linear-gradient(180deg, transparent 0%, rgba(11, 13, 14, 0.86) 100%);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--paper);
}

/* ---------- 显现（渐进增强） ---------- */
[data-reveal] {
  opacity: 1;
  transform: none;
}

html.js [data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 460ms var(--ease), transform 460ms var(--ease);
}

html.js [data-reveal].is-revealed {
  opacity: 1;
  transform: none;
}

/* ---------- 页脚 ---------- */
.site-footer {
  margin-top: 80px;
  background: var(--tiger-black);
  border-top: 1px solid var(--hairline);
  color: var(--mist);
}

.footer-inner { padding-block: 0 34px; }

.footer-top {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-block: 30px 26px;
  border-bottom: 1px solid var(--hairline-soft);
}

.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-height: 44px;
  border-radius: var(--radius-sm);
}

.brand__mark--footer { width: 34px; height: 34px; }

.footer-brand__text {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.footer-brand__name {
  font-family: var(--font-title);
  font-weight: 900;
  font-size: 1.05rem;
  color: var(--paper);
  letter-spacing: 0.02em;
}

.footer-brand__line {
  font-size: 0.8rem;
  color: var(--mist);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 30px;
  padding-block: 32px;
}

@media (min-width: 720px) {
  .footer-grid { grid-template-columns: 1fr 1.6fr; gap: 40px; }
}

.footer-col__title {
  font-family: var(--font-serif);
  font-size: 0.76rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--amber);
  margin-bottom: 14px;
}

.footer-nav {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.footer-nav__link {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  font-size: 0.9rem;
  color: var(--mist);
  border-radius: 4px;
  transition: color 140ms var(--ease), padding-left 140ms var(--ease);
}

.footer-nav__link:hover {
  color: var(--amber-bright);
  padding-left: 6px;
}

.footer-contact {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-contact__item {
  display: grid;
  grid-template-columns: 52px 1fr;
  gap: 10px;
  align-items: start;
  padding-block: 6px;
  border-bottom: 1px dashed var(--hairline-soft);
}

.footer-contact__key {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--slate);
  padding-top: 3px;
}

.footer-contact__value {
  font-size: 0.9rem;
  color: var(--paper);
  overflow-wrap: anywhere;
  border-radius: 4px;
  transition: color 140ms var(--ease);
}

a.footer-contact__value:hover { color: var(--amber-bright); }

.footer-contact__value--plain { color: var(--mist); }

.footer-service-note {
  margin-top: 14px;
  font-size: 0.78rem;
  line-height: 1.6;
  color: var(--mist);
  max-width: 56ch;
  padding-left: 12px;
  border-left: 2px solid var(--slate);
}

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding-top: 20px;
  border-top: 1px solid var(--hairline-soft);
}

.footer-legal__links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
}

.footer-legal__link {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  font-size: 0.82rem;
  color: var(--mist);
  border-radius: 4px;
  transition: color 140ms var(--ease);
}

.footer-legal__link:hover { color: var(--amber); }

.footer-legal__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 18px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: var(--slate);
}

.footer-icp { color: var(--mist); }
.footer-legal__copy { color: var(--slate); }

/* ---------- 减少动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }

  .btn--amber:hover,
  .btn--ghost:hover { transform: none; }

  html.js [data-reveal] {
    opacity: 1;
    transform: none;
  }

  .scroll-progress__bar { transition: none; }
}