/* ==========================================================================
   imToken钱包 · 共享样式 / assets/site.css
   命令栏 + 框景 + 连续画布：深墨蓝基底，品牌蓝作结构，青绿作状态，暖橙仅警示
   ========================================================================== */

/* --- 1. Reset ---------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }

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

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}

body, h1, h2, h3, h4, h5, h6, p, figure, blockquote, dl, dd, ol, ul { margin: 0; }
ul, ol { padding: 0; list-style: none; }
img, svg, video { display: block; max-width: 100%; }
button, input, select, textarea { font: inherit; color: inherit; }
a { color: inherit; }
table { border-collapse: collapse; width: 100%; }
[hidden] { display: none !important; }

/* --- 2. 设计令牌 ------------------------------------------------------- */
:root {
  /* 色彩 */
  --ink-950: #061020;
  --ink-900: #0A1A2F;
  --ink-800: #12294A;
  --brand-600: #0E5AD6;
  --brand-500: #1673FF;
  --brand-300: #6FA8FF;
  --mint-400: #2FE0C4;
  --amber-400: #FF9A3C;
  --slate-100: #E9F1FB;
  --slate-400: #93A7C0;
  --line-700: #1E3A5C;
  --paper-050: #F4F7FC;
  --ink-on-paper: #0A1A2F;

  /* 字体 */
  --font-head: "Inter", "HarmonyOS Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-body: "HarmonyOS Sans SC", "PingFang SC", "Noto Sans SC", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", "SFMono-Regular", Consolas, "Courier New", monospace;
  --font-serif: "Source Han Serif SC", "Songti SC", "Noto Serif SC", serif;

  /* 字号刻度 */
  --fs-12: 0.75rem;
  --fs-14: 0.875rem;
  --fs-16: 1rem;
  --fs-18: 1.125rem;
  --fs-22: 1.375rem;
  --fs-28: 1.75rem;
  --fs-40: 2.5rem;
  --fs-64: 4rem;
  --fs-96: 6rem;
  --fs-140: 8.75rem;

  /* 结构 */
  --shell: 1200px;
  --header-h: 62px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;

  /* 动效 */
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

/* --- 3. 基础排版 ------------------------------------------------------- */
body {
  min-height: 100vh;
  background-color: var(--ink-900);
  background-image: repeating-linear-gradient(
    to bottom,
    rgba(111, 168, 255, 0.045) 0 1px,
    transparent 1px 32px
  );
  color: var(--slate-100);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

@media (min-width: 700px) {
  body { font-size: 17px; }
}

@media (min-width: 900px) {
  body { background-attachment: fixed; }
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-head);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.18;
  color: var(--slate-100);
  text-wrap: balance;
}

h1 { font-size: clamp(2.1rem, 5.4vw, 4rem); }
h2 { font-size: clamp(1.5rem, 3.2vw, 2.5rem); }
h3 { font-size: var(--fs-22); line-height: 1.35; letter-spacing: -0.01em; }
h4 { font-size: var(--fs-18); line-height: 1.4; letter-spacing: 0; }

p { max-width: 34em; }
strong { font-weight: 700; color: var(--slate-100); }

code, kbd, samp, pre, .mono {
  font-family: var(--font-mono);
  font-size: 0.94em;
  letter-spacing: 0.02em;
}

::selection {
  background: var(--brand-600);
  color: #ffffff;
}

:focus-visible {
  outline: 2px solid var(--mint-400);
  outline-offset: 2px;
  border-radius: 3px;
}

/* --- 4. 布局容器与网格 ------------------------------------------------ */
.shell {
  width: min(100% - 2.25rem, var(--shell));
  margin-inline: auto;
}

@media (min-width: 900px) {
  .shell { width: min(100% - 3rem, var(--shell)); }
}

.section {
  padding-block: clamp(2.5rem, 6vw, 4.5rem);
}

.section__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.5rem 1.25rem;
  margin-bottom: 1.75rem;
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--mint-400);
}

.grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.5rem;
}

@media (min-width: 700px) {
  .grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (min-width: 900px) {
  .grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .grid { gap: 1.75rem; }
}

@media (min-width: 1024px) {
  .grid--rail {
    grid-template-columns: minmax(0, 24%) minmax(0, 1fr);
    gap: 2.5rem;
  }
}

/* --- 5. 通用组件 ------------------------------------------------------- */
.prose {
  max-width: 34em;
}

.prose p + p,
.prose h2 + p,
.prose h3 + p { margin-top: 1.05em; }

.prose h2 { margin-top: 2.2em; }
.prose h3 { margin-top: 1.8em; }
.prose ul, .prose ol { margin: 1em 0 0; padding-left: 1.35em; list-style: disc; }
.prose ol { list-style: decimal; }
.prose li + li { margin-top: 0.4em; }

.glass {
  background: rgba(18, 41, 74, 0.55);
  -webkit-backdrop-filter: blur(12px) saturate(130%);
  backdrop-filter: blur(12px) saturate(130%);
  border: 1px solid rgba(30, 58, 92, 0.95);
  border-radius: var(--radius-md);
  padding: 1.25rem 1.35rem;
  box-shadow: inset 0 1px 0 rgba(233, 241, 251, 0.045);
}

.panel {
  background: var(--ink-800);
  border-radius: var(--radius-md);
  padding: 1.4rem 1.5rem;
}

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.68rem 1.15rem;
  border: 1px solid var(--line-700);
  border-radius: 10px;
  background: rgba(18, 41, 74, 0.72);
  color: var(--slate-100);
  font-family: var(--font-head);
  font-size: var(--fs-14);
  font-weight: 600;
  letter-spacing: 0.01em;
  text-decoration: none;
  cursor: pointer;
  transition: background-color 0.18s var(--ease), border-color 0.18s var(--ease), color 0.18s var(--ease);
}

.btn:hover {
  border-color: var(--brand-300);
  background: rgba(22, 115, 255, 0.18);
  color: #ffffff;
}

.btn--primary {
  background: var(--brand-600);
  border-color: var(--brand-600);
  color: #ffffff;
}

.btn--primary:hover {
  background: var(--brand-500);
  border-color: var(--brand-500);
}

.btn--ghost {
  background: transparent;
}

/* 文本链接 */
.link-quiet {
  color: var(--brand-300);
  text-decoration: none;
  border-bottom: 1px solid rgba(111, 168, 255, 0.42);
  transition: color 0.16s var(--ease), border-color 0.16s var(--ease);
}

.link-quiet:hover {
  color: var(--mint-400);
  border-bottom-color: var(--mint-400);
}

/* 面包屑 */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.02em;
  color: var(--slate-400);
}

.breadcrumb__item {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.breadcrumb__item + .breadcrumb__item::before {
  content: "/";
  color: var(--line-700);
}

.breadcrumb a {
  color: var(--slate-400);
  text-decoration: none;
}

.breadcrumb a:hover { color: var(--brand-300); }
.breadcrumb [aria-current="page"] { color: var(--slate-100); }

/* 元信息与大号序号 */
.meta-line {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.02em;
  color: var(--slate-400);
}

.step-index {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(3rem, 9vw, 6rem);
  line-height: 0.86;
  letter-spacing: -0.05em;
  color: var(--brand-500);
}

/* 提示条 */
.notice {
  border-left: 3px solid var(--brand-300);
  background: rgba(22, 115, 255, 0.1);
  border-radius: 0 10px 10px 0;
  padding: 0.85rem 1rem;
  font-size: 0.95rem;
  color: var(--slate-100);
}

.notice--warn {
  border-left-color: var(--amber-400);
  background: rgba(255, 154, 60, 0.12);
}

.notice--ok {
  border-left-color: var(--mint-400);
  background: rgba(47, 224, 196, 0.1);
}

/* 分段切换 */
.segmented {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 0.25rem;
  padding: 0.25rem;
  border: 1px solid var(--line-700);
  border-radius: var(--radius-md);
  background: rgba(18, 41, 74, 0.6);
}

.segmented__btn {
  appearance: none;
  border: 0;
  background: transparent;
  color: var(--slate-400);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.02em;
  padding: 0.5rem 0.95rem;
  border-radius: 9px;
  cursor: pointer;
  transition: color 0.18s var(--ease), background-color 0.18s var(--ease);
}

.segmented__btn:hover { color: var(--slate-100); }

.segmented__btn[aria-selected="true"] {
  background: var(--brand-600);
  color: #ffffff;
}

.segmented__panel { margin-top: 1.5rem; }

/* 筛选 */
.filter-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.chip {
  appearance: none;
  border: 1px solid var(--line-700);
  background: rgba(6, 16, 32, 0.6);
  color: var(--slate-400);
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.03em;
  padding: 0.38rem 0.78rem;
  border-radius: 999px;
  cursor: pointer;
  transition: color 0.16s var(--ease), border-color 0.16s var(--ease), background-color 0.16s var(--ease);
}

.chip:hover {
  color: var(--slate-100);
  border-color: var(--brand-300);
}

.chip[aria-pressed="true"] {
  background: var(--mint-400);
  border-color: var(--mint-400);
  color: var(--ink-950);
  font-weight: 600;
}

.filter-status {
  margin-top: 0.75rem;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.02em;
  color: var(--slate-400);
}

/* 左侧锚点轨 */
.anchor-rail { position: relative; }

.anchor-rail__list {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
}

.anchor-rail__link {
  display: block;
  padding: 0.5rem 0.6rem 0.5rem 1.05rem;
  border-left: 2px solid var(--line-700);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--slate-400);
  text-decoration: none;
  transition: color 0.16s var(--ease), border-color 0.16s var(--ease);
}

.anchor-rail__link:hover { color: var(--slate-100); }

.anchor-rail__link[aria-current="true"] {
  color: var(--mint-400);
  border-left-color: var(--mint-400);
}

/* 图片容器基础规则 */
.media-figure {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  margin: 0;
}

.media-frame {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line-700);
  border-radius: var(--radius-lg);
  background-color: var(--ink-800);
  background-image:
    linear-gradient(150deg, rgba(22, 115, 255, 0.18), rgba(6, 16, 32, 0) 62%),
    linear-gradient(0deg, rgba(47, 224, 196, 0.08), rgba(0, 0, 0, 0) 55%);
  aspect-ratio: 16 / 9;
}

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

.media-frame--wide { aspect-ratio: 21 / 9; }
.media-frame--square { aspect-ratio: 1 / 1; }
.media-frame--tall { aspect-ratio: 4 / 5; }

.media-figure__cap {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.02em;
  color: var(--slate-400);
}

/* 显现 */
.js [data-reveal] {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.45s var(--ease), transform 0.45s var(--ease);
}

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

/* --- 6. 站点头部 ------------------------------------------------------- */
.skip-link {
  position: absolute;
  left: 1rem;
  top: -4.5rem;
  z-index: 300;
  padding: 0.6rem 1rem;
  border-radius: 0 0 10px 10px;
  background: var(--mint-400);
  color: var(--ink-950);
  font-family: var(--font-head);
  font-size: var(--fs-14);
  font-weight: 700;
  text-decoration: none;
  transition: top 0.18s var(--ease);
}

.skip-link:focus { top: 0; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 120;
  background: rgba(6, 16, 32, 0.9);
  -webkit-backdrop-filter: blur(16px) saturate(140%);
  backdrop-filter: blur(16px) saturate(140%);
  border-bottom: 1px solid var(--line-700);
  color: var(--slate-100);
}

.site-header__bar {
  display: flex;
  align-items: center;
  gap: 1rem;
  min-height: var(--header-h);
}

/* 品牌 */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  flex: 0 0 auto;
  text-decoration: none;
}

.brand__mark {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border: 1px solid var(--brand-500);
  border-radius: 9px;
  background: rgba(22, 115, 255, 0.16);
  color: var(--mint-400);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.brand__text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.brand__name {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: -0.01em;
  color: var(--slate-100);
}

.brand__line {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.04em;
  color: var(--slate-400);
  white-space: nowrap;
}

/* 命令栏导航 */
.cmd-nav {
  margin-left: auto;
}

.cmd-nav__list {
  display: flex;
  align-items: center;
  gap: 0.2rem;
}

.cmd-nav__link {
  display: inline-flex;
  align-items: center;
  gap: 0.42rem;
  padding: 0.6rem 0.62rem;
  border-bottom: 2px solid transparent;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.01em;
  color: var(--slate-400);
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.cmd-nav__link:hover { color: var(--slate-100); }

.cmd-nav__idx {
  font-size: 10.5px;
  color: var(--brand-500);
  opacity: 0.85;
}

.cmd-nav__link[aria-current="page"] {
  color: var(--mint-400);
  border-bottom-color: var(--mint-400);
}

.cmd-nav__link[aria-current="page"] .cmd-nav__idx {
  color: var(--mint-400);
  opacity: 1;
}

/* 移动端菜单按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 0.5rem;
  margin-left: auto;
  padding: 0.5rem 0.72rem;
  border: 1px solid var(--line-700);
  border-radius: 10px;
  background: rgba(18, 41, 74, 0.7);
  color: var(--slate-100);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  cursor: pointer;
  transition: border-color 0.18s var(--ease), background-color 0.18s var(--ease);
}

.nav-toggle:hover { border-color: var(--brand-300); }

.nav-toggle__bars {
  display: grid;
  gap: 4px;
  width: 16px;
}

.nav-toggle__bars i {
  display: block;
  height: 1.5px;
  background: var(--mint-400);
  transition: transform 0.18s var(--ease), opacity 0.18s var(--ease);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(1) {
  transform: translateY(5.5px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(3) {
  transform: translateY(-5.5px) rotate(-45deg);
}

/* 检索提示行 */
.cmd-hint {
  display: none;
  padding: 0.45rem 0 0.55rem;
  border-top: 1px dashed rgba(30, 58, 92, 0.9);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.03em;
  color: var(--slate-400);
}

.cmd-hint__key {
  margin-right: 0.55rem;
  color: var(--mint-400);
}

/* 滚动进度 */
.scroll-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--brand-500), var(--mint-400));
  will-change: transform;
}

/* --- 7. 站点页脚 ------------------------------------------------------- */
.site-footer {
  background: var(--ink-950);
  border-top: 1px solid var(--line-700);
  color: var(--slate-400);
  font-size: var(--fs-14);
}

.site-footer__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 2rem;
  padding-block: 3rem 2.25rem;
}

@media (min-width: 640px) {
  .site-footer__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 2.25rem;
  }
}

@media (min-width: 1000px) {
  .site-footer__grid {
    grid-template-columns: 1.5fr 1fr 1fr 1.35fr;
    gap: 2.5rem;
    padding-block: 3.5rem 2.5rem;
  }
}

.footer-col { min-width: 0; }

.footer-col__title {
  margin-bottom: 0.9rem;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--mint-400);
}

.footer-brand {
  font-family: var(--font-head);
  font-size: var(--fs-18);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--slate-100);
}

.footer-tagline {
  margin-top: 0.35rem;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.02em;
  color: var(--brand-300);
}

.footer-desc {
  margin-top: 0.9rem;
  max-width: 26em;
  line-height: 1.75;
}

.footer-list {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.footer-list a {
  color: var(--slate-400);
  text-decoration: none;
  transition: color 0.16s var(--ease);
}

.footer-list a:hover {
  color: var(--mint-400);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.footer-contact {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
}

.footer-contact li {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  line-height: 1.65;
}

.footer-contact__key {
  flex: 0 0 auto;
  min-width: 2.6em;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.06em;
  color: var(--brand-300);
}

.footer-contact__note {
  margin-top: 0.9rem;
  max-width: 28em;
  font-size: 12.5px;
  line-height: 1.75;
  color: var(--slate-400);
}

.site-footer__bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.6rem 1.5rem;
  padding-block: 1.15rem 1.5rem;
  border-top: 1px solid rgba(30, 58, 92, 0.8);
}

.footer-legal,
.footer-meta {
  max-width: none;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.03em;
  color: var(--slate-400);
}

.footer-meta { color: rgba(147, 167, 192, 0.8); }

/* --- 8. 移动端导航抽屉 ------------------------------------------------ */
@media (max-width: 899px) {
  .nav-toggle { display: inline-flex; }

  .cmd-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    margin-left: 0;
    max-height: 72vh;
    overflow-y: auto;
    padding: 0.6rem 1.25rem 1.1rem;
    background: #08152A;
    border-bottom: 1px solid var(--line-700);
    box-shadow: 0 18px 34px rgba(0, 0, 0, 0.42);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: opacity 0.18s var(--ease), transform 0.18s var(--ease), visibility 0s linear 0.18s;
  }

  .cmd-nav[data-open] {
    opacity: 1;
    visibility: visible;
    transform: none;
    transition-delay: 0s, 0s, 0s;
  }

  .cmd-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }

  .cmd-nav__link {
    width: 100%;
    padding: 0.8rem 0.7rem 0.8rem 0.85rem;
    border-bottom: 1px solid var(--line-700);
    border-left: 3px solid transparent;
    border-radius: 0;
    font-size: 13.5px;
  }

  .cmd-nav__link[aria-current="page"] {
    border-bottom-color: var(--line-700);
    border-left-color: var(--mint-400);
    background: rgba(47, 224, 196, 0.07);
  }
}

@media (min-width: 900px) {
  .cmd-nav { position: static; }
  .cmd-hint { display: block; }
}

@media (min-width: 1080px) {
  .brand__line { font-size: 11px; }
}

@media (max-width: 1079px) {
  .brand__line { display: none; }
}

/* --- 9. 无障碍与降级 --------------------------------------------------- */
@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;
  }

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