/* ============================================================
   江南体育 · 全站共享样式 /assets/site.css
   结构：重置 → 变量 → 中文排版 → 布局容器 → 色彩分区
        → 通用组件 → 头部 → 页脚 → 响应式 → 动效降级
   ============================================================ */

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

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

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

ul, ol { padding: 0; }

ul[class], ol[class] { list-style: none; }

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

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

button { background: none; border: 0; }

a { color: inherit; }

table { border-collapse: collapse; width: 100%; }

/* ---------- 2. 变量 ---------- */
:root {
  /* 珠宝色分区 */
  --c-deep: #12343B;
  --c-indigo: #171C3A;
  --c-paper: #F3EBDD;
  --c-gold: #D7A545;
  --c-red: #E34A33;
  --c-neon: #35E6C2;
  --c-wine: #741F3C;
  --c-mist: #7EA8A2;
  --c-gold-lt: #F1D28C;
  --c-black: #0A0F12;

  /* 派生 */
  --c-deep-soft: #0F2A32;
  --c-paper-lift: #FBF6EC;
  --c-ink-line: rgba(18, 52, 59, .16);
  --c-dark-line: rgba(126, 168, 162, .32);

  /* 字体 */
  --font-display: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", system-ui, sans-serif;
  --font-body: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", system-ui, -apple-system, sans-serif;
  --font-serif: "Songti SC", "Noto Serif SC", "Source Han Serif SC", Georgia, "Times New Roman", serif;
  --font-num: "DIN Alternate", "Bahnschrift", "Oswald", "Arial Narrow", ui-sans-serif, system-ui, sans-serif;

  /* 度量 */
  --w-max: 1440px;
  --w-prose: 42rem;
  --gutter: clamp(16px, 3.2vw, 44px);
  --header-h: 76px;

  /* 节奏 */
  --space-section: clamp(48px, 7vw, 104px);
  --ease: cubic-bezier(.22, .61, .36, 1);
  --shadow-panel: 0 26px 60px -34px rgba(10, 15, 18, .65);
}

/* ---------- 3. 中文排版基础 ---------- */
body {
  min-height: 100vh;
  background: var(--c-paper);
  color: var(--c-black);
  font-family: var(--font-body);
  font-size: clamp(15px, .35vw + 14px, 17px);
  line-height: 1.75;
  letter-spacing: .01em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.14;
  letter-spacing: -.012em;
}

h1 { font-size: clamp(2rem, 5vw, 4.2rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2.5rem); }
h3 { font-size: clamp(1.15rem, 1.6vw, 1.5rem); }
h4 { font-size: clamp(1rem, 1.2vw, 1.15rem); }

p { max-width: 42em; }

a {
  text-decoration-thickness: 1px;
  text-underline-offset: .22em;
}

strong { font-weight: 700; }

::selection {
  background: var(--c-gold);
  color: var(--c-black);
}

:focus-visible {
  outline: 2px solid var(--c-neon);
  outline-offset: 3px;
}

.site-header :focus-visible,
.site-footer :focus-visible {
  outline-color: var(--c-gold-lt);
}

/* ---------- 4. 布局容器 ---------- */
.container {
  width: 100%;
  max-width: var(--w-max);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section { padding-block: var(--space-section); }

.prose { max-width: var(--w-prose); }
.prose > * + * { margin-top: 1.1em; }
.prose p { line-height: 1.8; }
.prose h2 { margin-top: 2em; }
.prose h3 { margin-top: 1.6em; }
.prose ul, .prose ol { padding-left: 1.4em; }
.prose li + li { margin-top: .4em; }

/* 跳转链接 */
.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 400;
  padding: .7em 1.15em;
  background: var(--c-gold);
  color: var(--c-black);
  font-size: .9rem;
  font-weight: 700;
  letter-spacing: .04em;
  text-decoration: none;
  border-radius: 2px;
  transform: translateY(-180%);
  transition: transform .22s var(--ease);
}

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

/* ---------- 5. 色彩分区与蓝图底纹 ---------- */
.zone-deep { background: var(--c-deep); color: var(--c-paper); }
.zone-indigo { background: var(--c-indigo); color: var(--c-paper); }
.zone-wine { background: var(--c-wine); color: var(--c-paper); }
.zone-paper { background: var(--c-paper); color: var(--c-black); }

.zone-deep .eyebrow,
.zone-indigo .eyebrow,
.zone-wine .eyebrow { color: var(--c-mist); }

.zone-deep a, .zone-indigo a, .zone-wine a { color: var(--c-gold-lt); }

.blueprint { position: relative; isolation: isolate; }

.blueprint::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background-image:
    repeating-linear-gradient(90deg, rgba(126, 168, 162, .16) 0 1px, transparent 1px 56px),
    repeating-linear-gradient(0deg, rgba(126, 168, 162, .16) 0 1px, transparent 1px 56px);
}

/* ---------- 6. 通用组件 ---------- */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: .7em;
  font-family: var(--font-serif);
  font-size: .78rem;
  letter-spacing: .24em;
  text-transform: uppercase;
  color: #5C6F71;
}

.eyebrow::before {
  content: "";
  display: block;
  width: 26px;
  height: 1px;
  background: currentColor;
}

.data-num {
  font-family: var(--font-num);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  letter-spacing: -.02em;
  line-height: .95;
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: .4em;
  padding: .26em .68em;
  border: 1px solid currentColor;
  font-family: var(--font-num);
  font-size: .74rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: #2C4A4F;
}

.tag--gold { color: #8A6416; }
.tag--red { color: #B2301C; }

/* 按钮 */
.btn {
  --btn-bg: var(--c-gold);
  --btn-fg: #0A0F12;
  --btn-bd: var(--c-gold);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5em;
  padding: .8em 1.45em;
  font-family: var(--font-display);
  font-size: .95rem;
  font-weight: 700;
  letter-spacing: .06em;
  line-height: 1.15;
  text-decoration: none;
  cursor: pointer;
  background: var(--btn-bg);
  color: var(--btn-fg);
  border: 1px solid var(--btn-bd);
  border-radius: 2px;
  transition: transform .2s var(--ease), background .2s var(--ease),
              color .2s var(--ease), border-color .2s var(--ease), box-shadow .2s var(--ease);
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 16px 28px -20px rgba(10, 15, 18, .9);
}

.btn:active { transform: translateY(0); }

.btn--ghost {
  --btn-bg: transparent;
  --btn-fg: var(--c-paper);
  --btn-bd: rgba(215, 165, 69, .62);
}

.btn--ghost:hover {
  --btn-bg: rgba(215, 165, 69, .16);
  --btn-bd: var(--c-gold);
}

.btn--red {
  --btn-bg: var(--c-red);
  --btn-fg: #FFFFFF;
  --btn-bd: var(--c-red);
}

.btn--sm { padding: .58em 1em; font-size: .84rem; }
.btn--block { display: flex; width: 100%; }

/* 面包屑 */
.breadcrumbs {
  padding-block: 14px;
  font-size: .82rem;
  color: #47585B;
}

.breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .5em;
}

.breadcrumbs li {
  display: flex;
  align-items: center;
  gap: .5em;
}

.breadcrumbs li + li::before {
  content: "/";
  color: var(--c-mist);
}

.breadcrumbs a { text-decoration: none; }
.breadcrumbs a:hover { text-decoration: underline; }
.breadcrumbs [aria-current="page"] { color: var(--c-black); font-weight: 700; }

.breadcrumbs--invert { color: var(--c-mist); }
.breadcrumbs--invert [aria-current="page"] { color: var(--c-paper); }

/* 切角括线面板 */
.panel {
  position: relative;
  padding: clamp(18px, 2.4vw, 30px);
  background: var(--c-paper-lift);
  border: 1px solid var(--c-ink-line);
  box-shadow: var(--shadow-panel);
}

.panel::before,
.panel::after {
  content: "";
  position: absolute;
  width: 22px;
  height: 22px;
  pointer-events: none;
}

.panel::before {
  top: -1px; left: -1px;
  border-top: 2px solid var(--c-gold);
  border-left: 2px solid var(--c-gold);
}

.panel::after {
  bottom: -1px; right: -1px;
  border-bottom: 2px solid var(--c-mist);
  border-right: 2px solid var(--c-mist);
}

.panel--deep {
  background: rgba(243, 235, 221, .05);
  border-color: var(--c-dark-line);
  color: var(--c-paper);
}

/* 网格与簇 */
.grid {
  display: grid;
  gap: clamp(16px, 2.4vw, 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)); }

.cluster {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: clamp(10px, 1.6vw, 22px);
}

/* 图片容器基础规则（页面阶段放置占位内容） */
.media-frame {
  position: relative;
  display: block;
  overflow: hidden;
  width: 100%;
  aspect-ratio: 16 / 9;
  background:
    radial-gradient(120% 120% at 12% 8%, rgba(53, 230, 194, .16) 0%, transparent 55%),
    linear-gradient(135deg, #12343B 0%, #171C3A 62%, #0A0F12 100%);
  border: 1px solid var(--c-dark-line);
}

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

.media-frame::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    repeating-linear-gradient(90deg, rgba(241, 210, 140, .1) 0 1px, transparent 1px 64px),
    repeating-linear-gradient(0deg, rgba(241, 210, 140, .07) 0 1px, transparent 1px 64px);
  mix-blend-mode: screen;
}

.media-frame--16x9 { aspect-ratio: 16 / 9; }
.media-frame--21x9 { aspect-ratio: 21 / 9; }
.media-frame--4x3 { aspect-ratio: 4 / 3; }
.media-frame--1x1 { aspect-ratio: 1 / 1; }
.media-frame--3x4 { aspect-ratio: 3 / 4; }

.media-frame-caption {
  position: absolute;
  left: 0;
  bottom: 0;
  z-index: 1;
  padding: .55em .85em;
  font-family: var(--font-serif);
  font-size: .76rem;
  letter-spacing: .14em;
  color: var(--c-paper);
  background: rgba(10, 15, 18, .62);
}

/* ---------- 7. 头部 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 300;
  color: var(--c-paper);
  background: linear-gradient(180deg, #12343B 0%, #0F2A32 100%);
  border-bottom: 1px solid rgba(215, 165, 69, .42);
  box-shadow: 0 20px 42px -36px rgba(10, 15, 18, .95);
}

.site-header::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background-image:
    repeating-linear-gradient(90deg, rgba(241, 210, 140, .075) 0 1px, transparent 1px 72px),
    repeating-linear-gradient(0deg, rgba(53, 230, 194, .05) 0 1px, transparent 1px 40px);
  -webkit-mask-image: linear-gradient(90deg, #000 0%, rgba(0, 0, 0, .25) 70%, transparent 100%);
  mask-image: linear-gradient(90deg, #000 0%, rgba(0, 0, 0, .25) 70%, transparent 100%);
}

.scroll-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  pointer-events: none;
  z-index: 2;
}

.scroll-progress-bar {
  display: block;
  width: 100%;
  height: 100%;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--c-neon) 0%, var(--c-gold) 58%, var(--c-red) 100%);
}

.header-grid {
  width: 100%;
  max-width: var(--w-max);
  margin-inline: auto;
  padding: 10px var(--gutter);
  min-height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: clamp(12px, 2vw, 34px);
}

.brand-cluster {
  display: flex;
  align-items: center;
  gap: clamp(10px, 1.4vw, 20px);
  min-width: 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: inherit;
}

.brand-mark {
  position: relative;
  display: grid;
  place-items: center;
  flex: 0 0 auto;
  width: 34px;
  height: 34px;
  border: 1px solid var(--c-gold);
  transform: rotate(45deg);
  transition: transform .35s var(--ease), border-color .3s var(--ease);
}

.brand-mark::after {
  content: "";
  position: absolute;
  inset: 4px;
  border: 1px solid rgba(53, 230, 194, .5);
}

.brand-mark-line {
  display: block;
  width: 11px;
  height: 11px;
  background: var(--c-gold);
  box-shadow: 0 0 14px rgba(215, 165, 69, .75);
}

.brand:hover .brand-mark {
  transform: rotate(135deg);
  border-color: var(--c-gold-lt);
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.12;
}

.brand-name {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 800;
  letter-spacing: .1em;
  color: var(--c-paper);
}

.brand-latin {
  font-family: var(--font-serif);
  font-size: .6rem;
  letter-spacing: .3em;
  text-transform: uppercase;
  color: var(--c-mist);
}

.version-badge {
  padding: .32em .62em;
  border: 1px solid rgba(215, 165, 69, .48);
  font-family: var(--font-serif);
  font-size: .7rem;
  letter-spacing: .16em;
  color: var(--c-gold-lt);
  white-space: nowrap;
}

.header-trail {
  display: flex;
  align-items: center;
  gap: clamp(8px, 1.5vw, 22px);
}

.site-nav { display: block; }

.nav-list {
  display: flex;
  align-items: center;
  gap: clamp(6px, 1.5vw, 26px);
}

.nav-link {
  position: relative;
  display: inline-block;
  padding: 9px 2px;
  font-size: .95rem;
  letter-spacing: .05em;
  color: #DCE8E5;
  text-decoration: none;
  transition: color .2s var(--ease);
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 3px;
  width: 0;
  height: 1px;
  background: var(--c-gold);
  transition: width .28s var(--ease);
}

.nav-link:hover { color: var(--c-gold-lt); }
.nav-link:hover::after { width: 100%; }

.nav-link[aria-current="page"] { color: var(--c-gold-lt); }
.nav-link[aria-current="page"]::after { width: 100%; }

.feedback-beacon {
  display: inline-flex;
  align-items: center;
  gap: .5em;
  padding: .48em .78em;
  border: 1px solid rgba(53, 230, 194, .45);
  background: rgba(53, 230, 194, .07);
  color: var(--c-paper);
  font-size: .82rem;
  letter-spacing: .08em;
  text-decoration: none;
  white-space: nowrap;
  transition: background .2s var(--ease), border-color .2s var(--ease);
}

.feedback-beacon:hover {
  background: rgba(53, 230, 194, .18);
  border-color: var(--c-neon);
}

.beacon-dot {
  width: 7px;
  height: 7px;
  flex: 0 0 auto;
  border-radius: 50%;
  background: var(--c-neon);
  box-shadow: 0 0 0 0 rgba(53, 230, 194, .55);
  animation: beacon-pulse 2.6s ease-out infinite;
}

@keyframes beacon-pulse {
  0%   { box-shadow: 0 0 0 0 rgba(53, 230, 194, .55); }
  70%  { box-shadow: 0 0 0 9px rgba(53, 230, 194, 0); }
  100% { box-shadow: 0 0 0 0 rgba(53, 230, 194, 0); }
}

.nav-toggle {
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
  width: 44px;
  height: 44px;
  padding: 0;
  flex: 0 0 auto;
  background: rgba(243, 235, 221, .06);
  border: 1px solid rgba(215, 165, 69, .48);
  border-radius: 2px;
  cursor: pointer;
  transition: background .2s var(--ease), border-color .2s var(--ease);
}

.nav-toggle:hover {
  background: rgba(215, 165, 69, .18);
  border-color: var(--c-gold);
}

.nav-toggle-bar {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--c-gold-lt);
  transition: transform .3s var(--ease), opacity .2s var(--ease);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) {
  transform: translateY(4px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2) {
  transform: translateY(-4px) rotate(-45deg);
}

/* ---------- 8. 页脚 ---------- */
.site-footer {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding-top: clamp(38px, 5vw, 76px);
  color: var(--c-paper);
  background: linear-gradient(180deg, #171C3A 0%, #10152E 58%, #0A0F12 100%);
  border-top: 1px solid rgba(215, 165, 69, .42);
}

.site-footer::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background-image:
    repeating-linear-gradient(90deg, rgba(241, 210, 140, .055) 0 1px, transparent 1px 80px),
    repeating-linear-gradient(0deg, rgba(53, 230, 194, .045) 0 1px, transparent 1px 48px);
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, .9) 0%, transparent 88%);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, .9) 0%, transparent 88%);
}

.footer-grid {
  width: 100%;
  max-width: var(--w-max);
  margin-inline: auto;
  padding-inline: var(--gutter);
  display: grid;
  grid-template-columns: 1.5fr .8fr .8fr 1.35fr;
  gap: clamp(24px, 3vw, 56px);
}

.brand--footer .brand-name { font-size: 1.25rem; }
.brand--footer .brand-mark { width: 38px; height: 38px; }

.footer-summary {
  margin-top: 18px;
  max-width: 30ch;
  font-size: .92rem;
  line-height: 1.75;
  color: #C3D2CF;
}

.footer-cta { margin-top: 20px; }

.footer-col-title {
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--c-dark-line);
  font-family: var(--font-display);
  font-size: .78rem;
  font-weight: 700;
  letter-spacing: .22em;
  color: var(--c-gold-lt);
  text-transform: uppercase;
}

.footer-links {
  display: grid;
  gap: 10px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.footer-link {
  position: relative;
  display: inline-block;
  padding-left: 15px;
  font-size: .94rem;
  color: #DBE6E3;
  text-decoration: none;
  transition: color .2s var(--ease), transform .2s var(--ease);
}

.footer-link::before {
  content: "";
  position: absolute;
  left: 0;
  top: .68em;
  width: 6px;
  height: 1px;
  background: var(--c-mist);
  transition: width .2s var(--ease), background .2s var(--ease);
}

.footer-link:hover { color: var(--c-gold-lt); transform: translateX(2px); }
.footer-link:hover::before { width: 11px; background: var(--c-gold); }

.footer-contact {
  display: grid;
  gap: 12px;
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: .9rem;
}

.contact-line {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: .45em .6em;
}

.contact-key {
  font-family: var(--font-serif);
  font-size: .72rem;
  letter-spacing: .18em;
  color: var(--c-mist);
  white-space: nowrap;
}

.contact-value {
  color: var(--c-paper);
  word-break: break-word;
  font-variant-numeric: tabular-nums;
}

.copy-btn {
  padding: .22em .6em;
  border: 1px solid rgba(215, 165, 69, .5);
  border-radius: 2px;
  background: transparent;
  color: var(--c-gold-lt);
  font-family: var(--font-num);
  font-size: .7rem;
  letter-spacing: .14em;
  cursor: pointer;
  transition: background .2s var(--ease), color .2s var(--ease), border-color .2s var(--ease);
}

.copy-btn:hover { background: rgba(215, 165, 69, .18); border-color: var(--c-gold); }

.copy-btn.is-copied {
  color: var(--c-neon);
  border-color: var(--c-neon);
  background: rgba(53, 230, 194, .12);
}

.contact-note {
  margin-top: 16px;
  max-width: 34ch;
  font-size: .78rem;
  line-height: 1.7;
  color: #9FB3B1;
}

.copy-status {
  min-height: 1.4em;
  margin-top: 8px;
  font-size: .78rem;
  letter-spacing: .04em;
  color: var(--c-gold-lt);
}

.footer-bottom {
  width: 100%;
  max-width: var(--w-max);
  margin: clamp(28px, 4vw, 56px) auto 0;
  padding: 18px var(--gutter) 26px;
  border-top: 1px solid var(--c-dark-line);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 28px;
}

.footer-legal,
.footer-meta {
  font-size: .8rem;
  color: #A9BCBB;
}

.footer-legal a {
  color: #C3D2CF;
  text-decoration: none;
  border-bottom: 1px solid rgba(126, 168, 162, .45);
}

.footer-legal a:hover {
  color: var(--c-gold-lt);
  border-bottom-color: var(--c-gold-lt);
}

/* ---------- 9. 滚动显现 ---------- */
html.js-reveal [data-reveal] {
  opacity: 0;
  transform: translateY(16px);
}

html.js-reveal [data-reveal].is-revealed {
  opacity: 1;
  transform: none;
  transition: opacity .6s var(--ease), transform .6s var(--ease);
}

/* ---------- 10. 响应式 ---------- */
@media (max-width: 1200px) {
  .version-badge { display: none; }
}

@media (max-width: 1000px) {
  :root { --header-h: 66px; }

  .header-grid { flex-wrap: nowrap; }

  .site-nav {
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    visibility: hidden;
    background: linear-gradient(180deg, #0F2A32 0%, #12343B 100%);
    border-top: 1px solid var(--c-dark-line);
    border-bottom: 1px solid rgba(215, 165, 69, .42);
    box-shadow: 0 28px 52px -30px rgba(10, 15, 18, .95);
    transition: max-height .38s var(--ease), opacity .24s var(--ease), visibility .38s linear;
  }

  .site-header[data-open] .site-nav {
    max-height: min(72vh, 540px);
    overflow-y: auto;
    opacity: 1;
    visibility: visible;
  }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 6px 0 14px;
  }

  .nav-item { border-bottom: 1px solid rgba(126, 168, 162, .18); }
  .nav-item:last-child { border-bottom: none; }

  .nav-link {
    display: block;
    padding: 15px var(--gutter);
    font-size: 1.02rem;
  }

  .nav-link::after { display: none; }

  .nav-link[aria-current="page"] {
    color: var(--c-gold-lt);
    background: rgba(215, 165, 69, .12);
    box-shadow: inset 3px 0 0 var(--c-gold);
  }

  .nav-toggle { display: flex; }

  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
  .footer-col--contact { grid-column: 1 / -1; }
}

@media (max-width: 780px) {
  .grid--2,
  .grid--3,
  .grid--4 { grid-template-columns: 1fr; }

  .breadcrumbs { font-size: .78rem; }
}

@media (max-width: 560px) {
  .brand-name { font-size: 1rem; letter-spacing: .08em; }
  .brand-latin { font-size: .55rem; letter-spacing: .24em; }
  .brand-mark { width: 30px; height: 30px; }
  .feedback-beacon { padding: .42em .6em; font-size: .76rem; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 380px) {
  .beacon-label { display: none; }
}

/* ---------- 11. 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
    scroll-behavior: auto !important;
  }

  .beacon-dot { animation: none; }
  .btn:hover { transform: none; }
  .footer-link:hover { transform: none; }

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