/* =========================================================
   626登 · 中国区在线服务中枢 — 共享外壳样式 /assets/site.css
   深空岩蓝基底 · 霓虹青状态高亮 · 暖橙价格与库存强调
   ========================================================= */

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 150px;
}

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

ul, ol { padding: 0; list-style: none; }

img, svg, video, canvas { 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. 设计变量 ---------- */
:root {
  --c-void: #0B1220;
  --c-panel: #161F2E;
  --c-moss: #22322B;
  --c-clay: #B4623C;
  --c-mineral: #F2EDE4;
  --c-neon: #34E0D0;
  --c-hot: #FF7A1A;
  --c-book: #E0A83C;
  --c-cool: #8B9CB3;
  --c-halo: #A7F3EA;

  --line: rgba(167, 243, 234, 0.14);
  --line-strong: rgba(167, 243, 234, 0.30);
  --line-hot: rgba(255, 122, 26, 0.34);
  --line-neon: rgba(52, 224, 208, 0.45);

  --shell: 1280px;
  --shell-wide: 1480px;
  --gutter: clamp(18px, 4vw, 44px);
  --radius: 2px;

  --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei",
    "Source Han Sans SC", "Noto Sans CJK SC", "Helvetica Neue", Arial, sans-serif;
  --font-mono: "JetBrains Mono", "Roboto Mono", "SFMono-Regular", ui-monospace,
    Menlo, Consolas, "Courier New", monospace;

  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  --dur: 320ms;
}

/* ---------- 3. 基底与中文排版 ---------- */
body {
  min-height: 100%;
  background-color: var(--c-void);
  background-image:
    radial-gradient(1200px 620px at 80% -10%, rgba(52, 224, 208, 0.07), transparent 62%),
    radial-gradient(900px 520px at 4% 14%, rgba(255, 122, 26, 0.05), transparent 60%);
  background-repeat: no-repeat;
  color: var(--c-mineral);
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.75;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
}

p {
  font-size: clamp(15px, 1.05vw, 16px);
  line-height: 1.75;
}

p + p { margin-top: 1.15em; }

h1, h2, h3, h4 {
  font-weight: 800;
  line-height: 1.22;
  letter-spacing: -0.02em;
  color: var(--c-mineral);
}

h1 { font-size: clamp(30px, 4.4vw, 44px); }
h2 { font-size: clamp(23px, 2.6vw, 32px); }
h3 { font-size: clamp(18px, 1.5vw, 20px); font-weight: 700; letter-spacing: -0.01em; }
h4 { font-size: 16px; font-weight: 700; letter-spacing: 0; }

.num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
}

.num--hot {
  color: var(--c-hot);
  text-shadow: 0 0 12px rgba(255, 122, 26, 0.35);
}

::selection {
  background: rgba(52, 224, 208, 0.28);
  color: var(--c-mineral);
}

/* ---------- 4. 焦点与通用工具 ---------- */
:focus-visible {
  outline: 2px solid var(--c-neon);
  outline-offset: 3px;
  border-radius: var(--radius);
}

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

.shell {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.skip-link {
  position: absolute;
  left: 16px;
  top: -80px;
  z-index: 200;
  display: inline-block;
  padding: 10px 18px;
  background: var(--c-neon);
  color: var(--c-void);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-decoration: none;
  border-radius: var(--radius);
  box-shadow: 0 0 26px rgba(52, 224, 208, 0.45);
  transition: top 0.18s var(--ease);
}

.skip-link:focus { top: 12px; }

#main-content { display: block; }

/* ---------- 5. 页头 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: var(--c-void);
  box-shadow: 0 1px 0 rgba(167, 243, 234, 0.10), 0 14px 30px -26px rgba(0, 0, 0, 0.9);
}

.site-header::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(52, 224, 208, 0.42), transparent);
  pointer-events: none;
}

.header-shell { padding-block: 0; }

.header-bar {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  grid-template-areas: "note brand tools";
  align-items: center;
  gap: 12px;
  padding: 18px 0 12px;
}

.header-bar__note {
  grid-area: note;
  justify-self: start;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: 0.08em;
  color: var(--c-cool);
  font-family: var(--font-mono);
}

.header-bar__dot {
  display: inline-block;
  width: 4px;
  height: 4px;
  margin-inline: 9px;
  border-radius: 50%;
  background: var(--c-clay);
  vertical-align: middle;
}

.header-brand {
  grid-area: brand;
  justify-self: center;
  display: inline-flex;
  align-items: baseline;
  gap: 10px;
  text-decoration: none;
  transition: opacity 0.16s var(--ease);
}

.header-brand:hover { opacity: 0.86; }

.header-brand__mark {
  font-size: clamp(20px, 2.2vw, 26px);
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--c-mineral);
}

.header-brand__sub {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--c-cool);
}

.header-tools {
  grid-area: tools;
  justify-self: end;
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}

.header-cta {
  display: inline-flex;
  align-items: center;
  padding: 8px 14px;
  border: 1px solid var(--line-hot);
  border-radius: var(--radius);
  color: var(--c-hot);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-decoration: none;
  white-space: nowrap;
  transition: background-color 0.16s var(--ease), border-color 0.16s var(--ease),
    box-shadow 0.16s var(--ease);
}

.header-cta:hover,
.header-cta:focus-visible {
  border-color: var(--c-hot);
  background: rgba(255, 122, 26, 0.12);
  box-shadow: 0 0 18px rgba(255, 122, 26, 0.22);
}

.header-search {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px 11px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(22, 31, 46, 0.72);
  transition: border-color 0.16s var(--ease);
}

.header-search:hover,
.header-search:focus-within { border-color: var(--c-neon); }

.header-search__prompt {
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1;
  color: var(--c-neon);
}

.header-search__input {
  width: clamp(130px, 16vw, 220px);
  min-width: 0;
  border: 0;
  outline: none;
  background: transparent;
  color: var(--c-mineral);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.02em;
}

.header-search__input::placeholder {
  color: var(--c-cool);
  opacity: 0.9;
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 8px;
  padding: 9px 12px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: transparent;
  color: var(--c-mineral);
  font-size: 13px;
  letter-spacing: 0.08em;
  cursor: pointer;
  transition: border-color 0.16s var(--ease), color 0.16s var(--ease);
}

.nav-toggle:hover,
.nav-toggle:focus-visible {
  border-color: var(--c-neon);
  color: var(--c-neon);
}

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

.nav-toggle__bars {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
  width: 16px;
}

.nav-toggle__bars i {
  display: block;
  height: 1.5px;
  width: 100%;
  background: currentColor;
  transition: transform 0.2s var(--ease);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:first-child {
  transform: translateY(2.75px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:last-child {
  transform: translateY(-2.75px) rotate(-45deg);
}

.site-nav { border-top: 1px solid var(--line); }

.site-nav__list {
  display: flex;
  justify-content: center;
  align-items: stretch;
  flex-wrap: wrap;
  gap: clamp(8px, 2.4vw, 34px);
}

.site-nav__list li { display: flex; }

.site-nav__list a {
  display: inline-flex;
  align-items: center;
  padding: 11px 2px;
  border-bottom: 2px solid transparent;
  color: var(--c-cool);
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.05em;
  text-decoration: none;
  transition: color 0.16s var(--ease), border-color 0.16s var(--ease);
  white-space: nowrap;
}

.site-nav__list a:hover,
.site-nav__list a:focus-visible {
  color: var(--c-mineral);
  border-bottom-color: var(--c-neon);
}

.site-nav__list a[aria-current="page"] {
  color: var(--c-neon);
  border-bottom-color: var(--c-neon);
}

.status-strip {
  border-top: 1px solid var(--line);
  background: var(--c-panel);
}

.status-strip__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 6px 24px;
  padding-block: 7px;
}

.status-strip__item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: 0.08em;
  color: var(--c-cool);
}

.status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--c-neon);
  box-shadow: 0 0 8px rgba(52, 224, 208, 0.85);
  animation: status-pulse 2.4s ease-in-out infinite;
}

@keyframes status-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.32; }
}

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 90;
  height: 2px;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--c-neon), var(--c-hot));
  pointer-events: none;
}

/* ---------- 6. 页脚 ---------- */
.site-footer {
  margin-top: clamp(56px, 8vw, 110px);
  border-top: 1px solid var(--line);
  background: var(--c-panel);
  color: var(--c-mineral);
}

.footer-top {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.5fr);
  gap: 20px 56px;
  align-items: end;
  padding: clamp(32px, 5vw, 56px) 0 28px;
  border-bottom: 1px solid var(--line);
}

.footer-brand__mark {
  display: inline-block;
  font-size: clamp(22px, 2.4vw, 28px);
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--c-mineral);
  text-decoration: none;
}

.footer-brand__mark:hover { color: var(--c-neon); }

.footer-brand__line {
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--c-cool);
}

.footer-update {
  font-size: 13px;
  line-height: 1.85;
  color: var(--c-cool);
  max-width: 62ch;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 28px 32px;
  padding: 34px 0 32px;
  border-bottom: 1px solid var(--line);
}

.footer-col__title {
  margin-bottom: 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--c-neon);
}

.footer-col__list {
  display: flex;
  flex-direction: column;
  gap: 9px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--c-cool);
}

.footer-col__list a {
  color: var(--c-cool);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.16s var(--ease), border-color 0.16s var(--ease);
}

.footer-col__list a:hover,
.footer-col__list a:focus-visible {
  color: var(--c-mineral);
  border-bottom-color: var(--c-neon);
}

.footer-col__list--contact { gap: 14px; }

.footer-key {
  display: block;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--c-book);
}

.footer-value {
  display: block;
  margin-top: 2px;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--c-mineral);
  word-break: break-word;
}

.footer-note {
  display: block;
  font-size: 12.5px;
  line-height: 1.85;
  color: var(--c-cool);
}

.footer-base {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 28px;
  padding: 20px 0 34px;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--c-cool);
}

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

/* ---------- 7. 分区与基础组件 ---------- */
.section-band {
  position: relative;
  padding-block: clamp(44px, 6vw, 84px);
  border-top: 1px solid var(--line);
}

.section-band::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(167, 243, 234, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(167, 243, 234, 0.045) 1px, transparent 1px);
  background-size: 24px 24px;
  -webkit-mask-image: linear-gradient(180deg, #000, transparent 72%);
  mask-image: linear-gradient(180deg, #000, transparent 72%);
}

.section-band > * { position: relative; z-index: 1; }

.section-band--panel { background: var(--c-panel); }
.section-band--moss { background: var(--c-moss); }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--c-neon);
}

.sec-num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(22px, 2.4vw, 30px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--c-neon);
}

.sec-num--clay { color: var(--c-clay); }

.panel {
  position: relative;
  overflow: hidden;
  padding: clamp(20px, 2.6vw, 30px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--c-panel);
  transition: border-color 0.16s var(--ease);
}

.panel::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(120% 90% at 100% 0%, rgba(52, 224, 208, 0.055), transparent 62%);
}

.panel:hover { border-color: var(--line-neon); }

.panel--moss { background: var(--c-moss); }

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 9px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 11.5px;
  line-height: 1.7;
  letter-spacing: 0.08em;
  color: var(--c-cool);
  white-space: nowrap;
}

.tag--live { color: var(--c-neon); border-color: var(--line-neon); }
.tag--stock { color: var(--c-hot); border-color: var(--line-hot); }
.tag--book { color: var(--c-book); border-color: rgba(224, 168, 60, 0.45); }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: transparent;
  color: var(--c-mineral);
  font-size: 14.5px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-decoration: none;
  cursor: pointer;
  transition: border-color 0.16s var(--ease), color 0.16s var(--ease),
    background-color 0.16s var(--ease), box-shadow 0.16s var(--ease);
}

.btn:hover,
.btn:focus-visible {
  border-color: var(--c-neon);
  color: var(--c-neon);
}

.btn--solid {
  border-color: var(--c-neon);
  background: var(--c-neon);
  color: var(--c-void);
}

.btn--solid:hover,
.btn--solid:focus-visible {
  border-color: var(--c-halo);
  background: var(--c-halo);
  color: var(--c-void);
  box-shadow: 0 0 24px rgba(52, 224, 208, 0.35);
}

.btn--hot {
  border-color: var(--c-hot);
  color: var(--c-hot);
}

.btn--hot:hover,
.btn--hot:focus-visible {
  background: var(--c-hot);
  border-color: var(--c-hot);
  color: var(--c-void);
  box-shadow: 0 0 24px rgba(255, 122, 26, 0.35);
}

.breadcrumb {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: var(--c-cool);
}

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

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

.breadcrumb li + li::before {
  content: "/";
  margin-right: 10px;
  color: var(--line-strong);
}

.breadcrumb a {
  color: var(--c-cool);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.16s var(--ease), border-color 0.16s var(--ease);
}

.breadcrumb a:hover,
.breadcrumb a:focus-visible {
  color: var(--c-neon);
  border-bottom-color: var(--c-neon);
}

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

.prose {
  max-width: 70ch;
  font-size: 15.5px;
  line-height: 1.85;
  color: rgba(242, 237, 228, 0.88);
}

.prose h2 { margin-top: 2.2em; margin-bottom: 0.7em; color: var(--c-mineral); }
.prose h3 { margin-top: 1.6em; margin-bottom: 0.5em; color: var(--c-mineral); }
.prose p + p { margin-top: 1.05em; }

.prose ul,
.prose ol {
  display: flex;
  flex-direction: column;
  gap: 0.5em;
  margin-top: 0.9em;
}

.prose ul li { position: relative; padding-left: 1.2em; }

.prose ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.78em;
  width: 6px;
  height: 1px;
  background: var(--c-neon);
}

.prose ol { counter-reset: prose-ol; }
.prose ol li { position: relative; padding-left: 1.9em; counter-increment: prose-ol; }

.prose ol li::before {
  content: counter(prose-ol, decimal-leading-zero);
  position: absolute;
  left: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--c-clay);
}

.prose a {
  color: var(--c-neon);
  text-decoration: none;
  border-bottom: 1px solid rgba(52, 224, 208, 0.4);
}

.prose a:hover { border-bottom-color: var(--c-neon); }

.grid {
  display: grid;
  gap: clamp(20px, 2.6vw, 32px);
}

.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.grid--5-7 { grid-template-columns: 5fr 7fr; }
.grid--4-8 { grid-template-columns: 4fr 8fr; }
.grid--7-5 { grid-template-columns: 7fr 5fr; }

.rail {
  position: sticky;
  top: 150px;
  display: flex;
  flex-direction: column;
  gap: 18px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.7;
  letter-spacing: 0.06em;
  color: var(--c-cool);
}

.rail__figure {
  font-size: clamp(22px, 2.2vw, 28px);
  font-weight: 700;
  line-height: 1;
  color: var(--c-neon);
}

.metric {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.metric__value {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(26px, 3.4vw, 40px);
  font-weight: 700;
  line-height: 1;
  color: var(--c-hot);
  text-shadow: 0 0 12px rgba(255, 122, 26, 0.3);
}

.metric__unit {
  margin-left: 0.15em;
  font-size: 0.5em;
  letter-spacing: 0.15em;
  color: var(--c-cool);
  text-shadow: none;
}

.metric__label {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.08em;
  color: var(--c-cool);
}

.media-frame {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(150deg, var(--c-panel), var(--c-moss));
  aspect-ratio: 16 / 9;
}

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

.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(180deg, rgba(11, 18, 32, 0) 55%, rgba(11, 18, 32, 0.55));
}

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

.media-frame__cap {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 2;
  padding: 10px 14px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--c-cool);
}

/* ---------- 8. 动效：显现与错峰 ---------- */
.reveal {
  opacity: 1;
  transform: none;
}

html.js .reveal {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease);
}

html.js .reveal.is-in {
  opacity: 1;
  transform: none;
}

html.js [data-stagger] > * {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease);
}

html.js [data-stagger].is-in > * {
  opacity: 1;
  transform: none;
}

html.js [data-stagger].is-in > *:nth-child(1) { transition-delay: 0ms; }
html.js [data-stagger].is-in > *:nth-child(2) { transition-delay: 60ms; }
html.js [data-stagger].is-in > *:nth-child(3) { transition-delay: 120ms; }
html.js [data-stagger].is-in > *:nth-child(4) { transition-delay: 180ms; }
html.js [data-stagger].is-in > *:nth-child(5) { transition-delay: 240ms; }
html.js [data-stagger].is-in > *:nth-child(n + 6) { transition-delay: 300ms; }

/* ---------- 9. 响应式 ---------- */
@media (max-width: 1080px) {
  .header-cta { display: none; }
  .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 960px) {
  html { scroll-padding-top: 120px; }

  .shell { padding-inline: clamp(16px, 5vw, 28px); }

  .header-bar {
    grid-template-columns: minmax(0, 1fr) auto;
    grid-template-areas:
      "brand tools"
      "search search";
    row-gap: 10px;
    padding: 14px 0 12px;
  }

  .header-bar__note { display: none; }
  .header-brand { justify-self: start; }
  .header-search { grid-area: search; width: 100%; }
  .header-search__input { width: 100%; }
  .nav-toggle { display: inline-flex; }

  .site-nav { margin-top: 2px; }

  .site-nav__list {
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 6px 0 12px;
  }

  .site-nav[data-open] .site-nav__list { display: flex; }
  .site-nav__list li { display: block; }

  .site-nav__list a {
    justify-content: space-between;
    width: 100%;
    padding: 13px 2px;
    border-bottom: 1px solid var(--line);
    font-size: 16px;
  }

  .status-strip__inner { justify-content: flex-start; }

  .footer-top { align-items: start; }
  .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }

  .grid--5-7,
  .grid--4-8,
  .grid--7-5 { grid-template-columns: 1fr; }

  .grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }

  .rail {
    position: static;
    flex-direction: row;
    flex-wrap: wrap;
    gap: 14px;
  }
}

@media (max-width: 720px) {
  .footer-top { grid-template-columns: 1fr; gap: 18px; }
  .footer-grid { grid-template-columns: 1fr; gap: 26px; padding: 28px 0; }
  .footer-base { flex-direction: column; align-items: flex-start; }

  .grid--2,
  .grid--3,
  .grid--4 { grid-template-columns: 1fr; }

  .panel { padding: 20px 18px; }
}

@media (max-width: 400px) {
  .header-brand__sub { display: none; }
  .nav-toggle__text { display: none; }
}

/* ---------- 10. 降低动效偏好 ---------- */
@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;
  }

  .status-dot { animation: none; opacity: 1; }

  html.js .reveal,
  html.js [data-stagger] > * {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }

  .scroll-progress { display: none; }
}