/* ============================================================
   乐动在线官网 · 共享样式表 /assets/site.css
   夜间驾驶舱 + 模块化 Bento 板
   ============================================================ */

/* ---------- 令牌 ---------- */
:root {
  --ink-950: #030710;
  --ink-900: #070d1a;
  --ink-800: #101a2e;
  --ink-700: #22304a;

  --accent: #ff6a1f;
  --cyan: #29e0d0;
  --clay: #c2603a;
  --moss: #6d7f6a;
  --rice: #f3efe7;
  --white: #e8eef6;
  --mist: #8b97ab;
  --amber: #f2b23c;

  --line: rgba(34, 48, 74, 0.9);
  --line-soft: rgba(34, 48, 74, 0.55);

  --font-display: "HarmonyOS Sans SC", "Source Han Sans SC", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-body: var(--font-display);
  --font-mono: "JetBrains Mono", "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, "Courier New", monospace;

  --rail-w: clamp(238px, 20vw, 292px);
  --bar-h: 58px;
  --shell: 1240px;

  --r-sm: 10px;
  --r-md: 16px;
  --r-lg: 22px;
  --r-xl: 30px;

  --ease: cubic-bezier(0.22, 0.82, 0.28, 1);
  --shadow-1: 0 18px 44px -30px rgba(0, 0, 0, 0.95);
  --shadow-2: 0 26px 56px -28px rgba(0, 0, 0, 0.98);
}

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 84px;
}

body {
  margin: 0;
  min-height: 100%;
  background-color: var(--ink-900);
  background-image:
    radial-gradient(1100px 680px at 84% -10%, rgba(41, 224, 208, 0.075), transparent 62%),
    radial-gradient(900px 640px at -8% 2%, rgba(255, 106, 31, 0.08), transparent 60%);
  background-repeat: no-repeat;
  background-attachment: fixed;
  color: var(--white);
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.75;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

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

img { height: auto; }

a { color: inherit; }

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

h1, h2, h3, h4, h5, h6 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: -0.025em;
  line-height: 1.22;
  text-wrap: balance;
}

p { margin: 0; }

ul, ol { margin: 0; padding: 0; }

:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
  border-radius: 6px;
}

.visually-hidden {
  position: absolute !important;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

.mono { font-family: var(--font-mono); }

/* ---------- 跳过链接 ---------- */
.skip-link {
  position: fixed;
  inset-block-start: 10px;
  inset-inline-start: 10px;
  z-index: 320;
  padding: 10px 18px;
  border-radius: 10px;
  background: var(--cyan);
  color: #04201e;
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
  transform: translateY(-200%);
  transition: transform 0.22s var(--ease);
}

.skip-link:focus-visible { transform: translateY(0); }

/* ---------- 滚动进度 ---------- */
.scroll-progress {
  position: fixed;
  inset-block-start: 0;
  inset-inline-start: 0;
  width: 100%;
  height: 3px;
  z-index: 210;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--cyan), var(--accent));
  pointer-events: none;
}

/* ---------- 外壳容器 ---------- */
.shell {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: clamp(18px, 4vw, 46px);
}

.stack { display: grid; gap: var(--stack-gap, 16px); }

.cluster {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}

.rule {
  height: 1px;
  border: 0;
  margin: 0;
  background: linear-gradient(90deg, rgba(34, 48, 74, 0), rgba(34, 48, 74, 1) 18%, rgba(34, 48, 74, 1) 82%, rgba(34, 48, 74, 0));
}

/* ============================================================
   头部 · 框架式导航
   ============================================================ */
.site-header {
  position: fixed;
  inset-block-start: 0;
  inset-inline: 0;
  z-index: 120;
  background: var(--ink-950);
  border-block-end: 1px solid var(--ink-700);
}

.rail {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding: 10px clamp(16px, 4vw, 28px);
}

.rail__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  min-width: 0;
  flex: 1 1 auto;
}

/* 品牌 */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
  color: var(--white);
  text-decoration: none;
}

.brand__glyph {
  display: inline-flex;
  align-items: flex-end;
  gap: 3px;
  height: 17px;
  flex: none;
}

.brand__glyph i {
  display: block;
  width: 3px;
  border-radius: 2px;
  background: var(--accent);
}

.brand__glyph i:nth-child(1) { height: 9px; opacity: 0.55; }
.brand__glyph i:nth-child(2) { height: 17px; }
.brand__glyph i:nth-child(3) { height: 12px; background: var(--cyan); opacity: 0.85; }

.brand__name {
  font-size: 16.5px;
  font-weight: 800;
  letter-spacing: -0.02em;
  white-space: nowrap;
}

.brand__tag { display: none; }

/* 菜单按钮 */
.nav-toggle {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  flex: none;
  padding: 9px 15px 9px 13px;
  border-radius: 999px;
  border: 1px solid var(--ink-700);
  background: var(--ink-800);
  color: var(--white);
  font-size: 13.5px;
  font-weight: 700;
  cursor: pointer;
  transition: border-color 0.2s, background-color 0.2s;
}

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

.nav-toggle__bars {
  position: relative;
  display: block;
  width: 16px;
  height: 12px;
  flex: none;
}

.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  inset-inline: 0;
  height: 2px;
  border-radius: 2px;
  background: var(--cyan);
  transition: transform 0.3s var(--ease);
}

.nav-toggle__bars::before { top: 0; }
.nav-toggle__bars::after { bottom: 0; }

.site-header[data-open] .nav-toggle__bars::before { transform: translateY(5px) rotate(45deg); }
.site-header[data-open] .nav-toggle__bars::after { transform: translateY(-5px) rotate(-45deg); }

/* 主导航 —— 移动端抽屉 */
.site-nav {
  position: fixed;
  inset-block-start: var(--bar-h);
  inset-block-end: 0;
  inset-inline-start: 0;
  z-index: 140;
  width: min(86vw, 330px);
  padding: 22px 20px 40px;
  background: var(--ink-950);
  border-inline-end: 1px solid var(--ink-700);
  overflow-y: auto;
  overscroll-behavior: contain;
  transform: translateX(-102%);
  visibility: hidden;
  transition: transform 0.38s var(--ease), visibility 0.38s;
}

.site-nav[data-open] {
  transform: none;
  visibility: visible;
}

.site-nav__caption {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--mist);
}

.site-nav__list {
  list-style: none;
  display: grid;
  gap: 6px;
}

.site-nav__link {
  position: relative;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  border: 1px solid transparent;
  border-radius: 14px;
  color: rgba(232, 238, 246, 0.72);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: -0.01em;
  text-decoration: none;
  transition: color 0.2s, background-color 0.2s, border-color 0.2s;
}

.site-nav__link:hover {
  color: var(--white);
  background: rgba(16, 26, 46, 0.85);
  border-color: var(--ink-700);
}

.site-nav__num {
  flex: none;
  min-width: 18px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.06em;
  color: #41527a;
}

.site-nav__link[aria-current="page"] {
  color: #ffffff;
  background: linear-gradient(90deg, rgba(255, 106, 31, 0.18), rgba(255, 106, 31, 0) 86%);
  border-color: rgba(255, 106, 31, 0.34);
}

.site-nav__link[aria-current="page"] .site-nav__num { color: var(--accent); }

.site-nav__link[aria-current="page"]::before {
  content: "";
  position: absolute;
  inset-block: 22%;
  inset-inline-start: -1px;
  width: 3px;
  border-radius: 3px;
  background: var(--accent);
  box-shadow: 0 0 14px rgba(255, 106, 31, 0.75);
}

.site-nav__cta {
  width: 100%;
  margin-block-start: 22px;
}

/* 遮罩 */
.nav-scrim {
  position: fixed;
  inset-block-start: var(--bar-h);
  inset-block-end: 0;
  inset-inline: 0;
  z-index: 130;
  background: rgba(3, 7, 16, 0.74);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s;
}

.site-header[data-open] .nav-scrim {
  opacity: 1;
  visibility: visible;
}

/* 移动端底部悬浮条 */
.dock {
  position: fixed;
  inset-inline: 14px;
  inset-block-end: calc(14px + env(safe-area-inset-bottom, 0px));
  z-index: 110;
  display: flex;
  gap: 9px;
  padding: 9px;
  border-radius: 20px;
  background: var(--ink-950);
  border: 1px solid var(--ink-700);
  box-shadow: var(--shadow-2);
}

.dock__action {
  flex: 1 1 0;
  min-width: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 11px 12px;
  border-radius: 14px;
  border: 1px solid var(--ink-700);
  background: var(--ink-800);
  color: var(--white);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: -0.01em;
  text-decoration: none;
  cursor: pointer;
  transition: border-color 0.2s, background-color 0.2s;
}

.dock__action:hover { border-color: var(--cyan); }

.dock__action--accent {
  background: var(--accent);
  border-color: var(--accent);
  color: #170703;
}

.dock__action--accent:hover { background: #ff7f3d; border-color: #ff7f3d; }

/* ============================================================
   页脚
   ============================================================ */
.site-footer {
  position: relative;
  margin-block-start: clamp(48px, 8vw, 96px);
  padding-block: clamp(34px, 5vw, 58px) calc(104px + env(safe-area-inset-bottom, 0px));
  background: linear-gradient(180deg, #030710, #070d1a);
  border-block-start: 1px solid var(--ink-700);
}

.site-footer::before {
  content: "";
  position: absolute;
  inset-block-start: -1px;
  inset-inline: 0;
  height: 5px;
  background: linear-gradient(90deg, var(--clay), var(--accent) 30%, var(--cyan) 66%, var(--moss));
  opacity: 0.86;
}

.footer-top {
  display: grid;
  gap: clamp(26px, 3.4vw, 40px);
  grid-template-columns: repeat(auto-fit, minmax(196px, 1fr));
}

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

.brand--footer {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.brand--footer .brand__name { font-size: 19px; }

.footer-brand__line {
  margin-block-start: 14px;
  max-width: 26ch;
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
}

.footer-brand__scale {
  display: flex;
  align-items: flex-end;
  gap: 5px;
  height: 26px;
  margin-block-start: 18px;
}

.footer-brand__scale span {
  display: block;
  width: 5px;
  border-radius: 2px;
  background: var(--ink-700);
}

.footer-brand__scale span:nth-child(1) { height: 10px; background: var(--moss); }
.footer-brand__scale span:nth-child(2) { height: 18px; background: var(--clay); }
.footer-brand__scale span:nth-child(3) { height: 26px; background: var(--accent); }
.footer-brand__scale span:nth-child(4) { height: 14px; background: var(--cyan); }

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

.footer-col__title {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-block-end: 14px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--mist);
}

.footer-col__title::before {
  content: "";
  flex: none;
  width: 14px;
  height: 2px;
  border-radius: 2px;
  background: var(--cyan);
}

.footer-col__list {
  list-style: none;
  display: grid;
  gap: 10px;
}

.footer-col__list a {
  font-size: 14.5px;
  color: rgba(232, 238, 246, 0.72);
  text-decoration: none;
  transition: color 0.18s;
}

.footer-col__list a:hover { color: var(--cyan); }

.footer-col__list--plain li {
  font-size: 14px;
  line-height: 1.7;
  color: rgba(232, 238, 246, 0.72);
  overflow-wrap: anywhere;
}

.footer-col__key {
  margin-inline-end: 8px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.12em;
  color: var(--moss);
}

.footer-base {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 22px;
  margin-block-start: clamp(30px, 4vw, 48px);
  padding-block-start: 20px;
  border-block-start: 1px solid var(--ink-700);
  font-size: 13px;
  color: var(--mist);
}

.footer-base__copy { margin: 0; }

.footer-base__icp {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
}

.footer-base__links {
  list-style: none;
  display: flex;
  gap: 18px;
  margin: 0 0 0 auto;
  padding: 0;
}

.footer-base__links a {
  color: var(--mist);
  text-decoration: none;
  transition: color 0.18s;
}

.footer-base__links a:hover { color: var(--cyan); }

/* ============================================================
   通用组件
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 20px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-family: inherit;
  font-size: 14.5px;
  font-weight: 700;
  letter-spacing: -0.01em;
  line-height: 1.2;
  text-decoration: none;
  cursor: pointer;
  transition: background-color 0.2s, border-color 0.2s, color 0.2s, transform 0.2s var(--ease), box-shadow 0.2s;
}

.btn:active { transform: translateY(1px); }

.btn--accent {
  background: var(--accent);
  color: #170703;
  box-shadow: 0 14px 30px -18px rgba(255, 106, 31, 0.95);
}

.btn--accent:hover { background: #ff7f3d; }

.btn--outline {
  background: rgba(16, 26, 46, 0.7);
  border-color: var(--ink-700);
  color: var(--white);
}

.btn--outline:hover { border-color: var(--cyan); color: var(--cyan); }

.btn--cyan {
  background: var(--cyan);
  color: #04201e;
  box-shadow: 0 14px 30px -18px rgba(41, 224, 208, 0.9);
}

.btn--cyan:hover { background: #4ff0e2; }

.btn--sm { padding: 8px 15px; font-size: 13px; }

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

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--cyan);
}

.eyebrow::before {
  content: "";
  width: 22px;
  height: 1px;
  background: var(--cyan);
  opacity: 0.75;
}

.section-head {
  display: grid;
  gap: 12px;
  max-width: 62ch;
  margin-block-end: clamp(22px, 3vw, 34px);
}

.section-head__title {
  margin: 0;
  font-size: clamp(24px, 3.2vw, 38px);
  font-weight: 800;
  letter-spacing: -0.028em;
}

.section-head__lead {
  margin: 0;
  max-width: 58ch;
  font-size: 16px;
  line-height: 1.78;
  color: var(--mist);
}

.panel {
  position: relative;
  padding: clamp(18px, 2.4vw, 28px);
  border: 1px solid var(--ink-700);
  border-radius: var(--r-lg);
  background: linear-gradient(158deg, rgba(16, 26, 46, 0.95), rgba(7, 13, 26, 0.92));
  box-shadow: var(--shadow-1);
  overflow: hidden;
}

.panel--flush { padding: 0; }

.panel--accent {
  border-color: rgba(255, 106, 31, 0.4);
  background: linear-gradient(158deg, rgba(255, 106, 31, 0.14), rgba(7, 13, 26, 0.94));
}

.panel--cyan {
  border-color: rgba(41, 224, 208, 0.38);
  background: linear-gradient(158deg, rgba(41, 224, 208, 0.12), rgba(7, 13, 26, 0.94));
}

.panel--clay {
  border-color: rgba(194, 96, 58, 0.42);
  background: linear-gradient(158deg, rgba(194, 96, 58, 0.2), rgba(7, 13, 26, 0.94));
}

.panel--moss {
  border-color: rgba(109, 127, 106, 0.42);
  background: linear-gradient(158deg, rgba(109, 127, 106, 0.22), rgba(7, 13, 26, 0.94));
}

.bento {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: clamp(12px, 1.4vw, 18px);
}

.bento > * { grid-column: span 12; min-width: 0; }

@media (min-width: 640px) {
  .bento .col-4 { grid-column: span 6; }
  .bento .col-6 { grid-column: span 6; }
  .bento .col-8 { grid-column: span 12; }
  .bento .col-9 { grid-column: span 12; }
  .bento .col-3 { grid-column: span 6; }
}

@media (min-width: 1024px) {
  .bento .col-3 { grid-column: span 3; }
  .bento .col-4 { grid-column: span 4; }
  .bento .col-6 { grid-column: span 6; }
  .bento .col-8 { grid-column: span 8; }
  .bento .col-9 { grid-column: span 9; }
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 11px;
  border: 1px solid var(--ink-700);
  border-radius: 999px;
  background: rgba(16, 26, 46, 0.8);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.05em;
  color: var(--mist);
}

.chip--accent { border-color: rgba(255, 106, 31, 0.45); background: rgba(255, 106, 31, 0.1); color: #ffb98f; }
.chip--cyan { border-color: rgba(41, 224, 208, 0.42); background: rgba(41, 224, 208, 0.09); color: #8bf0e7; }
.chip--clay { border-color: rgba(194, 96, 58, 0.5); background: rgba(194, 96, 58, 0.14); color: #e2a184; }
.chip--moss { border-color: rgba(109, 127, 106, 0.55); background: rgba(109, 127, 106, 0.15); color: #b3c3b0; }
.chip--amber { border-color: rgba(242, 178, 60, 0.5); background: rgba(242, 178, 60, 0.1); color: var(--amber); }

.breadcrumb {
  font-size: 13.5px;
  color: var(--mist);
}

.breadcrumb ol {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.breadcrumb li {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.breadcrumb li + li::before {
  content: "/";
  color: #3a4a68;
  font-family: var(--font-mono);
}

.breadcrumb a {
  color: var(--mist);
  text-decoration: none;
  transition: color 0.18s;
}

.breadcrumb a:hover { color: var(--cyan); }

.breadcrumb [aria-current="page"] { color: var(--white); }

.prose {
  max-width: 46rem;
  font-size: 16.5px;
  line-height: 1.85;
  color: rgba(232, 238, 246, 0.84);
}

.prose > * + * { margin-block-start: 1.15em; }

.prose h2 {
  margin-block-start: 1.9em;
  font-size: clamp(21px, 2.4vw, 27px);
  color: #ffffff;
}

.prose h3 {
  margin-block-start: 1.5em;
  font-size: 18px;
  color: #ffffff;
}

.prose ul,
.prose ol { padding-inline-start: 1.35em; }

.prose li + li { margin-block-start: 0.5em; }

.prose a { color: var(--cyan); text-underline-offset: 3px; }

.prose strong { color: #ffffff; font-weight: 700; }

.prose blockquote {
  margin: 1.5em 0;
  padding: 14px 20px;
  border-inline-start: 3px solid var(--clay);
  border-radius: 0 14px 14px 0;
  background: rgba(194, 96, 58, 0.1);
  color: var(--rice);
}

.prose code {
  padding: 2px 7px;
  border-radius: 6px;
  background: rgba(34, 48, 74, 0.7);
  font-family: var(--font-mono);
  font-size: 0.9em;
  color: var(--cyan);
}

.band {
  position: relative;
  padding-block: clamp(24px, 3.4vw, 42px);
  border-block: 1px solid var(--ink-700);
  background: linear-gradient(90deg, rgba(194, 96, 58, 0.14), rgba(16, 26, 46, 0.35) 46%, rgba(41, 224, 208, 0.12));
}

.band::before {
  content: "";
  position: absolute;
  inset-block-start: -1px;
  inset-inline: 0;
  height: 6px;
  background: linear-gradient(90deg, var(--clay), var(--accent) 32%, var(--cyan) 70%, var(--moss));
}

.metric { display: grid; gap: 5px; }

.metric__value {
  font-family: var(--font-mono);
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1;
  color: #ffffff;
}

.metric__unit {
  margin-inline-start: 4px;
  font-size: 0.5em;
  letter-spacing: 0;
  color: var(--mist);
}

.metric__label {
  font-size: 13px;
  line-height: 1.55;
  color: var(--mist);
}

.meter { display: grid; gap: 8px; }

.meter__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
}

.meter__label { font-size: 13.5px; color: var(--mist); }

.meter__value {
  font-family: var(--font-mono);
  font-size: 14.5px;
  font-weight: 600;
  color: var(--white);
}

.meter__track {
  height: 8px;
  border-radius: 999px;
  background: var(--ink-700);
  overflow: hidden;
}

.meter__fill {
  display: block;
  width: var(--meter-value, 50%);
  height: 100%;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--cyan), var(--accent));
}

.meter--amber .meter__fill { background: linear-gradient(90deg, var(--amber), var(--clay)); }
.meter--moss .meter__fill { background: linear-gradient(90deg, var(--moss), var(--cyan)); }

/* 图片容器基础规则 */
.figure {
  display: grid;
  gap: 10px;
  margin: 0;
}

.figure__frame {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--ink-700);
  border-radius: 18px;
  aspect-ratio: var(--figure-ratio, 16 / 10);
  background:
    radial-gradient(120% 100% at 78% 0%, rgba(41, 224, 208, 0.12), transparent 58%),
    linear-gradient(150deg, #101a2e, #070d1a);
}

.figure__frame > img,
.figure__frame > picture > img,
.figure__frame > svg {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.figure__frame--wide { --figure-ratio: 21 / 9; }
.figure__frame--tall { --figure-ratio: 3 / 4; }
.figure__frame--square { --figure-ratio: 1 / 1; }

.figure__frame--empty {
  background-image:
    repeating-linear-gradient(135deg, rgba(34, 48, 74, 0.55) 0 2px, transparent 2px 12px),
    radial-gradient(120% 100% at 78% 0%, rgba(41, 224, 208, 0.1), transparent 58%),
    linear-gradient(150deg, #101a2e, #070d1a);
}

.figure__caption {
  font-size: 13px;
  line-height: 1.6;
  color: var(--mist);
}

/* ---------- 显现动画 ---------- */
[data-reveal] {
  transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
}

.is-reveal-ready [data-reveal]:not(.is-visible) {
  opacity: 0;
  transform: translateY(18px);
}

/* ============================================================
   响应式
   ============================================================ */
@media (min-width: 1024px) {
  html { scroll-padding-top: 30px; }

  body { padding-inline-start: var(--rail-w); }

  .scroll-progress {
    inset-inline-start: var(--rail-w);
    width: calc(100% - var(--rail-w));
  }

  .site-header {
    inset-block: 0;
    inset-inline-end: auto;
    width: var(--rail-w);
    border-block-end: 0;
    border-inline-end: 1px solid var(--ink-700);
    background: linear-gradient(180deg, #030710 0%, #060b16 62%, #030710 100%);
  }

  .rail {
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    gap: 0;
    height: 100%;
    max-width: none;
    margin: 0;
    padding: clamp(24px, 3.4vh, 40px) clamp(18px, 1.6vw, 26px) 26px;
  }

  .rail__head {
    display: block;
    flex: none;
    padding-block-end: clamp(18px, 2.4vh, 26px);
    border-block-end: 1px solid var(--ink-700);
  }

  .nav-toggle { display: none; }

  .brand {
    display: grid;
    grid-template-columns: auto 1fr;
    align-items: center;
    gap: 6px 12px;
    width: 100%;
  }

  .brand__glyph { grid-row: 1 / span 2; height: 22px; gap: 3px; }
  .brand__glyph i { width: 4px; }
  .brand__glyph i:nth-child(1) { height: 11px; }
  .brand__glyph i:nth-child(2) { height: 22px; }
  .brand__glyph i:nth-child(3) { height: 15px; }

  .brand__name { font-size: 21px; letter-spacing: -0.03em; }

  .brand__tag {
    display: block;
    grid-column: 2;
    font-size: 12.5px;
    line-height: 1.5;
    color: var(--mist);
  }

  .site-nav {
    position: static;
    inset: auto;
    display: flex;
    flex-direction: column;
    flex: 1 1 auto;
    width: auto;
    padding: 24px 0 0;
    background: none;
    border: 0;
    overflow: visible;
    transform: none;
    visibility: visible;
  }

  .site-nav__caption { margin-block-end: 12px; }

  .site-nav__list { gap: 4px; }

  .site-nav__link {
    padding: 12px 14px;
    font-size: 15px;
  }

  .site-nav__cta { margin-block-start: auto; padding-block: 12px; }

  .nav-scrim { display: none; }

  .dock { display: none; }

  .site-footer {
    padding-block-end: clamp(30px, 4vh, 48px);
  }
}

@media (max-width: 1023px) {
  main { padding-block-start: var(--bar-h); }

  .footer-base__links { margin-inline-start: 0; }
}

@media (max-width: 419px) {
  .brand__name { font-size: 15.5px; }
  .nav-toggle__text { display: none; }
}

/* ---------- 减弱动效 ---------- */
@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;
  }

  [data-reveal],
  .is-reveal-ready [data-reveal]:not(.is-visible) {
    opacity: 1 !important;
    transform: none !important;
  }
}