/* =========================================================
   huatihui-connect.com.cn — 共享样式 /assets/site.css
   深空黑连续画布 + 侧边品牌轨道 + 双层导航
   ========================================================= */

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

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

body, h1, h2, h3, h4, h5, p, dl, dd, dt, figure, ul, ol { 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; }
button { background: none; border: 0; cursor: pointer; }
a { color: inherit; text-decoration: none; }
[hidden] { display: none !important; }

:root {
  --hu-ink: #0B0E12;
  --hu-rock: #171C22;
  --hu-grey: #7E8698;
  --hu-snow: #F3EFE6;
  --hu-cyan: #35E0D0;
  --hu-red: #B7372E;
  --hu-gold: #E8B44A;
  --hu-blue: #4A8FD8;
  --hu-moss: #5C7A55;
  --hu-clay: #C1704A;
  --hu-line: rgba(126, 134, 152, 0.22);
  --hu-line-soft: rgba(126, 134, 152, 0.14);
  --rail-w: 92px;
  --shell-max: 1280px;
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  --font-display: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "SimSun", Georgia, serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --font-mono: "JetBrains Mono", "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  --font-geo: "Archivo Black", "Arial Black", "Helvetica Neue", Impact, sans-serif;
}

body {
  background: var(--hu-ink);
  color: var(--hu-snow);
  font-family: var(--font-body);
  font-size: 16.5px;
  line-height: 1.75;
  letter-spacing: 0.012em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: 0.01em;
}

.num, [data-count-to], .stat__value, .nav-top__status { font-family: var(--font-mono); font-variant-numeric: tabular-nums; }

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

::selection { background: rgba(53, 224, 208, 0.28); color: var(--hu-snow); }

/* ---------------- 跳转链接 ---------------- */
.skip-link {
  position: fixed;
  left: 14px;
  top: -80px;
  z-index: 200;
  padding: 10px 18px;
  background: var(--hu-cyan);
  color: var(--hu-ink);
  font-weight: 700;
  font-size: 14px;
  clip-path: polygon(8px 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%, 0 8px);
  transition: top 0.24s var(--ease);
}
.skip-link:focus { top: 14px; }

/* ---------------- 头部外壳 ---------------- */
.nav-shell {
  position: sticky;
  top: 0;
  z-index: 60;
  margin-left: var(--rail-w);
  background: rgba(11, 14, 18, 0.93);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--hu-line);
}

/* ---------------- 品牌轨道 ---------------- */
.brand-rail {
  position: fixed;
  left: 0;
  top: 0;
  bottom: 0;
  width: var(--rail-w);
  z-index: 70;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  padding: 22px 0 18px;
  overflow: hidden auto;
  background: linear-gradient(180deg, #0B0E12 0%, #11161C 52%, #0B0E12 100%);
  border-right: 1px solid var(--hu-line);
}
.brand-rail::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: repeating-linear-gradient(90deg, rgba(243, 239, 230, 0.035) 0 1px, rgba(243, 239, 230, 0) 1px 3px);
  opacity: 0.7;
}
.brand-rail__mark {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  position: relative;
  z-index: 1;
}
.brand-rail__glyph {
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 800;
  color: var(--hu-ink);
  background: linear-gradient(140deg, var(--hu-cyan), #7ff0e4);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%);
}
.brand-rail__word {
  writing-mode: vertical-rl;
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 800;
  letter-spacing: 0.3em;
  color: var(--hu-snow);
}
.brand-rail__spine {
  position: relative;
  z-index: 1;
  flex: 1 1 auto;
  width: 1px;
  min-height: 28px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  align-items: center;
  background: linear-gradient(180deg, rgba(126, 134, 152, 0) 0%, var(--hu-line) 22%, var(--hu-line) 78%, rgba(126, 134, 152, 0) 100%);
}
.brand-rail__tick { width: 9px; height: 1px; background: var(--hu-red); }
.brand-rail__tick:nth-child(2) { background: var(--hu-snow); }
.brand-rail__tick:nth-child(3) { background: var(--hu-blue); }
.brand-rail__tick:nth-child(4) { background: var(--hu-moss); }
.brand-rail__tick:nth-child(5) { background: var(--hu-gold); }

.brand-rail__season {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}
.brand-rail__season-label {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.34em;
  color: var(--hu-grey);
}
.rail-season {
  display: flex;
  flex-direction: column;
  gap: 2px;
  max-height: 40vh;
  overflow-y: auto;
  overflow-x: hidden;
  padding-right: 2px;
  scrollbar-width: thin;
}
.rail-season::-webkit-scrollbar { width: 3px; }
.rail-season::-webkit-scrollbar-thumb { background: rgba(126, 134, 152, 0.45); }
.rail-season__btn {
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.4;
  padding: 3px 9px;
  color: var(--hu-grey);
  border-left: 2px solid transparent;
  transition: color 0.2s var(--ease), background-color 0.2s var(--ease), border-color 0.2s var(--ease);
}
.rail-season__btn:hover { color: var(--hu-snow); background: rgba(243, 239, 230, 0.06); }
.rail-season__btn[aria-pressed="true"] {
  color: var(--hu-cyan);
  border-left-color: var(--hu-cyan);
  background: rgba(53, 224, 208, 0.1);
}
.brand-rail__foot {
  position: relative;
  z-index: 1;
  display: flex;
  justify-content: center;
}
.brand-rail__domain {
  writing-mode: vertical-rl;
  font-family: var(--font-mono);
  font-size: 9.5px;
  letter-spacing: 0.22em;
  color: #4d5563;
}

/* ---------------- 上层信息带 ---------------- */
.nav-top {
  border-bottom: 1px dashed var(--hu-line);
  font-size: 12.5px;
  color: var(--hu-grey);
}
.nav-top__inner {
  max-width: var(--shell-max);
  margin: 0 auto;
  padding: 9px 26px;
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}
.nav-top__tagline { margin: 0; letter-spacing: 0.1em; }
.nav-top__meta {
  margin: 0 0 0 auto;
  display: flex;
  align-items: center;
  gap: 9px;
}
.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--hu-cyan);
  box-shadow: 0 0 0 3px rgba(53, 224, 208, 0.16);
  animation: hu-pulse 2.6s var(--ease) infinite;
}
@keyframes hu-pulse {
  0%, 100% { box-shadow: 0 0 0 3px rgba(53, 224, 208, 0.16); }
  50% { box-shadow: 0 0 0 7px rgba(53, 224, 208, 0.02); }
}
.nav-top__status { font-size: 11.5px; letter-spacing: 0.08em; }
.nav-top__cta { padding: 6px 13px; font-size: 12.5px; }

/* ---------------- 下层栏目带 ---------------- */
.nav-main { position: relative; }
.nav-main__inner {
  position: relative;
  max-width: var(--shell-max);
  margin: 0 auto;
  padding: 0 26px;
  min-height: 58px;
  display: flex;
  align-items: center;
  gap: 18px;
}
.nav-main__label {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.24em;
  color: #4d5563;
  white-space: nowrap;
}
.nav-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 2px;
}
.nav-link {
  position: relative;
  display: inline-block;
  padding: 17px 14px;
  font-size: 14.5px;
  letter-spacing: 0.05em;
  color: #c3cad6;
  transition: color 0.2s var(--ease);
}
.nav-link::after {
  content: "";
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 10px;
  height: 2px;
  background: var(--hu-cyan);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.24s var(--ease);
}
.nav-link:hover { color: var(--hu-snow); }
.nav-link:hover::after { transform: scaleX(1); }
.nav-link[aria-current="page"] { color: var(--hu-snow); }
.nav-link[aria-current="page"]::after {
  transform: scaleX(1);
  box-shadow: 0 0 10px rgba(53, 224, 208, 0.55);
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  margin-left: auto;
  padding: 8px 13px;
  font-size: 12.5px;
  letter-spacing: 0.12em;
  color: var(--hu-snow);
  border: 1px solid rgba(126, 134, 152, 0.34);
  background: rgba(23, 28, 34, 0.75);
  clip-path: polygon(7px 0, 100% 0, 100% calc(100% - 7px), calc(100% - 7px) 100%, 0 100%, 0 7px);
}
.nav-toggle__bars {
  position: relative;
  display: block;
  width: 16px;
  height: 10px;
}
.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--hu-cyan);
  transition: transform 0.24s var(--ease);
}
.nav-toggle__bars::before { top: 0; }
.nav-toggle__bars::after { bottom: 0; }
.nav-main[data-open] .nav-toggle__bars::before { transform: translateY(4px) rotate(45deg); }
.nav-main[data-open] .nav-toggle__bars::after { transform: translateY(-4px) rotate(-45deg); }

.nav-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  background: linear-gradient(90deg, var(--hu-cyan), var(--hu-gold));
  transform: scaleX(0);
  transform-origin: 0 50%;
  transition: transform 0.12s linear;
}

/* ---------------- 通用按钮 ---------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 18px;
  font-family: var(--font-body);
  font-size: 13.5px;
  font-weight: 600;
  letter-spacing: 0.06em;
  border: 1px solid transparent;
  clip-path: polygon(9px 0, 100% 0, 100% calc(100% - 9px), calc(100% - 9px) 100%, 0 100%, 0 9px);
  transition: background-color 0.22s var(--ease), color 0.22s var(--ease), border-color 0.22s var(--ease);
}
.btn--ghost {
  color: var(--hu-cyan);
  border-color: rgba(53, 224, 208, 0.45);
  background: rgba(53, 224, 208, 0.06);
}
.btn--ghost:hover { background: rgba(53, 224, 208, 0.16); color: #9df4ec; }
.btn--solid { background: var(--hu-cyan); color: #06201e; }
.btn--solid:hover { background: #6ceade; }
.btn--gold {
  background: linear-gradient(120deg, #E8B44A 0%, #f4d98f 100%);
  color: #241a05;
  font-family: var(--font-mono);
}
.btn--gold:hover { background: linear-gradient(120deg, #f0c463 0%, #ffe9ae 100%); }
.btn[disabled], .btn[aria-disabled="true"] { opacity: 0.45; pointer-events: none; }

/* ---------------- 页面容器 ---------------- */
.site-main { display: block; margin-left: var(--rail-w); min-height: 46vh; }
.shell { width: 100%; max-width: var(--shell-max); margin: 0 auto; padding: 0 26px; }
.shell--narrow { max-width: 860px; }
.shell--wide { max-width: 1520px; }

/* ---------------- 面包屑 ---------------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  padding: 24px 0 0;
  font-size: 12.5px;
  color: var(--hu-grey);
}
.breadcrumb__item { display: flex; align-items: center; gap: 10px; }
.breadcrumb a {
  color: var(--hu-grey);
  border-bottom: 1px solid rgba(126, 134, 152, 0.35);
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}
.breadcrumb a:hover { color: var(--hu-cyan); border-color: var(--hu-cyan); }
.breadcrumb__sep { color: #3c434e; }

/* ---------------- 区块节奏 ---------------- */
.section { position: relative; padding: clamp(56px, 8vw, 118px) 0; }
.section__head {
  display: grid;
  grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  gap: 28px;
  align-items: end;
  margin-bottom: clamp(28px, 4vw, 54px);
}
.section__title {
  font-size: clamp(30px, 4vw, 46px);
  margin: 0;
}
.section__note { margin: 0; color: var(--hu-grey); font-size: 15px; }
.eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--hu-cyan);
}
.eyebrow::before { content: ""; width: 26px; height: 1px; background: currentColor; }

/* ---------------- 网格 ---------------- */
.grid { display: grid; gap: clamp(16px, 2vw, 26px); }
.grid--7-5 { grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); }
.grid--8-4 { grid-template-columns: minmax(0, 8fr) minmax(0, 4fr); }
.grid--halves { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--thirds { grid-template-columns: repeat(3, minmax(0, 1fr)); }

/* ---------------- 切角面板 ---------------- */
.panel {
  position: relative;
  background: var(--hu-rock);
  padding: clamp(20px, 2.4vw, 32px);
  border-top: 2px solid rgba(53, 224, 208, 0.5);
}
.panel::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: repeating-linear-gradient(135deg, rgba(243, 239, 230, 0.022) 0 2px, rgba(243, 239, 230, 0) 2px 7px);
}
.panel--cut { clip-path: polygon(0 0, calc(100% - 24px) 0, 100% 24px, 100% 100%, 0 100%); }
.panel__title {
  font-family: var(--font-display);
  font-size: clamp(19px, 2.2vw, 24px);
  margin: 0 0 12px;
}
.panel__body { color: #c6ccd6; font-size: 15.5px; }

/* ---------------- 数据组件 ---------------- */
.stat { display: flex; flex-direction: column; gap: 6px; }
.stat__value {
  font-size: clamp(28px, 4.2vw, 62px);
  font-weight: 700;
  line-height: 1;
  color: var(--hu-snow);
}
.stat__value--gold { color: var(--hu-gold); }
.stat__value--cyan { color: var(--hu-cyan); }
.stat__label { font-size: 12.5px; letter-spacing: 0.16em; color: var(--hu-grey); }
.stat__unit { font-family: var(--font-mono); font-size: 13px; color: var(--hu-grey); margin-left: 6px; }

.meter {
  position: relative;
  height: 6px;
  background: rgba(126, 134, 152, 0.18);
  overflow: hidden;
}
.meter__fill {
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: var(--p, 50%);
  background: linear-gradient(90deg, var(--hu-gold), var(--hu-cyan));
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.8s var(--ease);
}
[data-reveal].is-visible .meter__fill,
.meter.is-visible .meter__fill { transform: scaleX(1); }

.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  border: 1px solid var(--hu-line);
  color: var(--hu-grey);
}
.chip--cyan { color: var(--hu-cyan); border-color: rgba(53, 224, 208, 0.45); background: rgba(53, 224, 208, 0.08); }
.chip--gold { color: var(--hu-gold); border-color: rgba(232, 180, 74, 0.45); background: rgba(232, 180, 74, 0.08); }
.chip--red { color: #e2847c; border-color: rgba(183, 55, 46, 0.5); background: rgba(183, 55, 46, 0.14); }

/* ---------------- 折叠面板 ---------------- */
.disclosure { border-top: 1px solid var(--hu-line-soft); }
.disclosure__trigger {
  display: flex;
  align-items: center;
  gap: 14px;
  width: 100%;
  padding: 16px 0;
  text-align: left;
  font-family: var(--font-display);
  font-size: 17px;
  color: var(--hu-snow);
}
.disclosure__trigger::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 18px;
  color: var(--hu-cyan);
  transition: transform 0.24s var(--ease);
}
.disclosure__trigger[aria-expanded="true"]::after { transform: rotate(45deg); }
.disclosure__body { padding: 0 0 20px; color: #c6ccd6; font-size: 15.5px; }

/* ---------------- 图片容器基础规则 ---------------- */
.media {
  position: relative;
  display: block;
  overflow: hidden;
  background: var(--hu-rock);
}
.media img { width: 100%; height: 100%; object-fit: cover; }
.media--cut { clip-path: polygon(0 0, calc(100% - 24px) 0, 100% 24px, 100% 100%, 0 100%); }
.media--slant { clip-path: polygon(0 0, 100% 0, 100% 100%, 0 calc(100% - 34px)); }
.media--16x9 { aspect-ratio: 16 / 9; }
.media--4x3 { aspect-ratio: 4 / 3; }
.media--1x1 { aspect-ratio: 1 / 1; }
.media--21x9 { aspect-ratio: 21 / 9; }
.media__scan {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(180deg, rgba(11, 14, 18, 0) 40%, rgba(11, 14, 18, 0.88) 100%);
}
.media__caption {
  position: absolute;
  left: 18px;
  right: 18px;
  bottom: 15px;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--hu-snow);
}

/* ---------------- 页脚 ---------------- */
.site-footer {
  position: relative;
  margin-left: var(--rail-w);
  background: #080A0D;
  border-top: 1px solid var(--hu-line);
  color: var(--hu-snow);
}
.foot-band {
  height: 3px;
  background: linear-gradient(
    90deg,
    var(--hu-blue) 0 20%,
    var(--hu-snow) 20% 40%,
    var(--hu-red) 40% 60%,
    var(--hu-moss) 60% 80%,
    var(--hu-gold) 80% 100%
  );
}
.site-footer__inner {
  max-width: var(--shell-max);
  margin: 0 auto;
  padding: clamp(40px, 6vw, 74px) 26px clamp(28px, 3vw, 44px);
  display: grid;
  grid-template-columns: minmax(0, 3fr) minmax(0, 2fr) minmax(0, 4fr) minmax(0, 3fr);
  gap: clamp(24px, 3vw, 48px);
}
.foot-brand__mark {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 800;
  letter-spacing: 0.06em;
  margin-bottom: 10px;
}
.foot-brand__note { color: var(--hu-grey); font-size: 14px; margin-bottom: 14px; }
.foot-brand__domain {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--hu-cyan);
}
.foot-col__title {
  display: flex;
  align-items: center;
  gap: 9px;
  margin-bottom: 14px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--hu-grey);
}
.foot-col__title::before { content: ""; width: 14px; height: 2px; background: var(--hu-red); }
.foot-col__link { transition: color 0.2s var(--ease); }
.foot-col__link:hover { color: var(--hu-cyan); }
.foot-list { display: grid; gap: 8px; }
.foot-list__link {
  font-size: 14.5px;
  color: #c3cad6;
  transition: color 0.2s var(--ease), transform 0.2s var(--ease);
  display: inline-block;
}
.foot-list__link:hover { color: var(--hu-cyan); transform: translateX(3px); }

.foot-index {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(16px, 2vw, 30px);
}
.foot-index__list { display: grid; gap: 7px; }
.foot-index__list li {
  font-size: 13.5px;
  color: #9aa3b1;
  padding-left: 12px;
  position: relative;
}
.foot-index__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 5px;
  height: 1px;
  background: rgba(126, 134, 152, 0.6);
}

.foot-contact__list { display: grid; gap: 10px; }
.foot-contact__row { display: grid; grid-template-columns: 68px minmax(0, 1fr); gap: 10px; align-items: baseline; }
.foot-contact__row dt {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--hu-grey);
}
.foot-contact__row dd {
  font-size: 13.5px;
  color: #d5dae3;
  word-break: break-word;
}

.site-footer__base {
  max-width: var(--shell-max);
  margin: 0 auto;
  padding: 16px 26px 34px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 28px;
  border-top: 1px solid var(--hu-line-soft);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.05em;
  color: var(--hu-grey);
}
.foot-legal { margin: 0; }

/* ---------------- 滚动显现 ---------------- */
.js [data-reveal] { opacity: 0; transform: translateY(20px); }
.js [data-reveal].is-visible {
  opacity: 1;
  transform: none;
  transition: opacity 0.56s var(--ease), transform 0.56s var(--ease);
}

/* ---------------- 响应式：平板 ---------------- */
@media (max-width: 1100px) {
  :root { --rail-w: 78px; }
  .nav-link { padding: 16px 11px; font-size: 14px; }
  .nav-link::after { left: 11px; right: 11px; }
  .section__head { grid-template-columns: minmax(0, 1fr); gap: 16px; align-items: start; }
  .site-footer__inner { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 980px) {
  .nav-top__tagline { flex: 1 1 100%; }
  .nav-top__meta { margin-left: 0; }
  .nav-top__cta { margin-left: auto; }
  .foot-index { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

/* ---------------- 响应式：手机 / 窄屏 ---------------- */
@media (max-width: 899px) {
  :root { --rail-w: 0px; }

  .nav-top { display: none; }

  .brand-rail {
    position: relative;
    inset: auto;
    width: 100%;
    height: auto;
    flex-direction: row;
    align-items: center;
    gap: 12px;
    padding: 9px 16px;
    overflow: visible;
    border-right: 0;
    border-bottom: 1px solid var(--hu-line);
  }
  .brand-rail::after { display: none; }
  .brand-rail__mark { flex-direction: row; gap: 10px; }
  .brand-rail__glyph { width: 30px; height: 30px; font-size: 15px; }
  .brand-rail__word { writing-mode: horizontal-tb; font-size: 14px; letter-spacing: 0.18em; }
  .brand-rail__spine { display: none; }
  .brand-rail__season { margin-left: auto; flex-direction: row; align-items: center; gap: 10px; }
  .brand-rail__season-label { display: none; }
  .rail-season {
    flex-direction: row;
    max-height: none;
    max-width: 52vw;
    overflow-x: auto;
    overflow-y: hidden;
    gap: 0;
    padding: 0;
  }
  .rail-season::-webkit-scrollbar { height: 0; }
  .rail-season__btn {
    border-left: 0;
    border-bottom: 2px solid transparent;
    padding: 4px 9px;
    white-space: nowrap;
  }
  .rail-season__btn[aria-pressed="true"] {
    border-left-color: transparent;
    border-bottom-color: var(--hu-cyan);
    background: transparent;
  }
  .brand-rail__foot { display: none; }

  .nav-main__inner { min-height: 54px; padding: 0 16px; }
  .nav-main__label { display: none; }
  .nav-toggle { display: inline-flex; }
  .nav-list {
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    z-index: 8;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 6px 16px 16px;
    background: #10151B;
    border-top: 1px solid var(--hu-line);
    border-bottom: 1px solid var(--hu-line);
  }
  .nav-main[data-open] .nav-list { display: flex; }
  .nav-link {
    display: block;
    padding: 13px 2px;
    font-size: 15.5px;
    border-bottom: 1px dashed var(--hu-line-soft);
  }
  .nav-link::after { display: none; }
  .nav-link[aria-current="page"] { color: var(--hu-cyan); }
  .nav-link[aria-current="page"]::before {
    content: "";
    display: inline-block;
    width: 6px;
    height: 6px;
    margin-right: 10px;
    vertical-align: middle;
    background: var(--hu-cyan);
  }

  .shell, .site-footer__inner, .site-footer__base { padding-left: 16px; padding-right: 16px; }
  .grid--7-5, .grid--8-4, .grid--halves, .grid--thirds { grid-template-columns: minmax(0, 1fr); }
  .foot-index { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .media--21x9 { aspect-ratio: 16 / 9; }
}

@media (max-width: 620px) {
  body { font-size: 16px; }
  .site-footer__inner { grid-template-columns: minmax(0, 1fr); gap: 30px; }
  .foot-index { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .foot-contact__row { grid-template-columns: minmax(0, 1fr); gap: 2px; }
  .rail-season { max-width: 60vw; }
}

/* ---------------- 动效降级 ---------------- */
@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;
  }
  .js [data-reveal] { opacity: 1 !important; transform: none !important; }
  .meter__fill { transform: scaleX(1) !important; }
  .nav-progress { transition: none !important; }
  .status-dot { animation: none; }
}