/* ==========================================================================
   伟德官网BV · 共享站点样式 /assets/site.css
   坐标轴式游牧刊物：深绿底 + 坐标网格 + 堆叠画板
   ========================================================================== */

:root {
  /* 色板 */
  --night: #0B1F17;
  --tundra: #12362A;
  --signal: #1F7A55;
  --silver: #CBD5D0;
  --index: #8A9A94;
  --cyber: #3FE0D4;
  --amber: #FF8A3D;
  --cream: #F3E8D5;
  --ink: #241A15;
  --cinnabar: #D8432A;

  /* 字体 */
  --font-display: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-text: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: "JetBrains Mono", "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  /* 度量 */
  --shell: 1200px;
  --gutter: clamp(18px, 4vw, 48px);
  --rail-w: 40px;
  --radius: 14px;
  --line: rgba(203, 213, 208, 0.14);
  --line-strong: rgba(203, 213, 208, 0.32);
  --shadow-1: 0 22px 44px -30px rgba(0, 0, 0, 0.92);
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 96px;
}

body {
  margin: 0;
  min-height: 100vh;
  background-color: var(--night);
  background-image:
    linear-gradient(to right, rgba(63, 224, 212, 0.045) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(63, 224, 212, 0.045) 1px, transparent 1px);
  background-size: 88px 88px;
  background-attachment: fixed;
  color: var(--silver);
  font-family: var(--font-text);
  font-size: 16px;
  line-height: 1.75;
  font-weight: 400;
  overflow-x: hidden;
}

img, svg, video { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { margin: 0; padding: 0; list-style: none; }
h1, h2, h3, h4, p, figure { margin: 0; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
table { border-collapse: collapse; width: 100%; }

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

/* ---------- 跳转链接 ---------- */
.skip-link {
  position: absolute;
  left: 50%;
  top: -120px;
  transform: translateX(-50%);
  z-index: 120;
  padding: 11px 20px;
  background: var(--cream);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  border-radius: 0 0 12px 12px;
  transition: top 0.18s var(--ease);
}
.skip-link:focus { top: 0; }

/* ---------- 阅读进度条 ---------- */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--cyber), var(--amber));
  z-index: 60;
  pointer-events: none;
}

/* ==========================================================================
   头部
   ========================================================================== */
.site-header {
  position: relative;
  z-index: 20;
  background: linear-gradient(180deg, rgba(11, 31, 23, 0.98), rgba(11, 31, 23, 0.92));
  border-bottom: 1px solid var(--line);
}

.header-inner {
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

/* ---------- 左侧坐标轴导航 ---------- */
.axis-rail {
  position: fixed;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  z-index: 30;
  width: var(--rail-w);
  padding: 12px 0 12px 8px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  opacity: 0.55;
  transition: opacity 0.25s var(--ease);
}
.axis-rail:hover,
.axis-rail:focus-within { opacity: 1; }

.axis-rail__list { display: flex; flex-direction: column; gap: 2px; }

.axis-rail__link {
  position: relative;
  display: flex;
  align-items: center;
  height: 28px;
  padding-left: 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--index);
  transition: color 0.2s var(--ease);
}
.axis-rail__link::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 8px;
  height: 1.5px;
  background: currentColor;
  transform: translateY(-50%);
  transition: width 0.2s var(--ease), background 0.2s var(--ease), box-shadow 0.2s var(--ease);
}
.axis-rail__link:hover { color: var(--cyber); }
.axis-rail__link:hover::before { width: 14px; background: var(--cyber); }
.axis-rail__link[aria-current="page"] { color: var(--cyber); }
.axis-rail__link[aria-current="page"]::before {
  width: 14px;
  background: var(--cyber);
  box-shadow: 0 0 12px var(--cyber);
}
.axis-rail__num { display: block; }

/* ---------- 居中刊头 ---------- */
.masthead {
  position: relative;
  padding: 30px 0 0;
  text-align: center;
}

.masthead__toolbar {
  position: absolute;
  top: 30px;
  right: 0;
  display: flex;
  align-items: center;
  gap: 8px;
}

.masthead__brand-line {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(28px, 4.4vw, 46px);
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--cream);
}

.masthead__sub {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.26em;
  color: var(--index);
}

.masthead__scale {
  height: 10px;
  margin: 20px 0 0;
  border-bottom: 1px solid var(--line);
  background-image: repeating-linear-gradient(to right, var(--line-strong) 0 1px, transparent 1px 26px);
  background-size: 26px 6px;
  background-position: bottom left;
  background-repeat: repeat-x;
}

/* 栏目索引带 */
.masthead__nav { display: block; margin-top: 4px; }

.masthead__nav-list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
}

.masthead__nav-list > li {
  position: relative;
  display: flex;
  align-items: center;
}
.masthead__nav-list > li + li::before {
  content: "/";
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--line-strong);
}

.masthead__nav-link {
  position: relative;
  display: inline-block;
  padding: 10px 18px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 15px;
  letter-spacing: 0.06em;
  color: var(--silver);
  transition: color 0.2s var(--ease);
}
.masthead__nav-link::after {
  content: "";
  position: absolute;
  left: 18px;
  right: 18px;
  bottom: 4px;
  height: 2px;
  background: var(--signal);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.22s var(--ease), background 0.22s var(--ease);
}
.masthead__nav-link:hover { color: var(--cream); }
.masthead__nav-link:hover::after { transform: scaleX(1); }
.masthead__nav-link[aria-current="page"] { color: var(--cyber); }
.masthead__nav-link[aria-current="page"]::after {
  transform: scaleX(1);
  background: var(--cyber);
}

/* ---------- 刊头快捷槽位 ---------- */
.slot {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 13px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--silver);
  white-space: nowrap;
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease), background 0.2s var(--ease);
}
.slot__key { font-weight: 700; color: var(--cyber); }
.slot__label { color: inherit; }
.slot:hover {
  border-color: var(--cyber);
  color: var(--cream);
  background: rgba(63, 224, 212, 0.08);
}
.slot--amber .slot__key { color: var(--amber); }
.slot--amber:hover {
  border-color: var(--amber);
  background: rgba(255, 138, 61, 0.1);
}

/* ---------- 移动导航按钮 ---------- */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  padding: 8px 14px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--silver);
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease);
}
.nav-toggle:hover { border-color: var(--cyber); color: var(--cream); }
.nav-toggle__bars {
  position: relative;
  width: 18px;
  height: 10px;
}
.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  height: 1.5px;
  background: currentColor;
  transition: transform 0.2s var(--ease);
}
.nav-toggle__bars::before { top: 0; }
.nav-toggle__bars::after { bottom: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before { transform: translateY(4.25px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after { transform: translateY(-4.25px) rotate(-45deg); }

/* ---------- 节奏条 ---------- */
.refresh-badge {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin-top: 22px;
  padding: 10px var(--gutter);
  border-top: 1px solid var(--line);
  background: repeating-linear-gradient(90deg, rgba(31, 122, 85, 0.16) 0 12px, transparent 12px 24px);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.07em;
  color: var(--index);
  text-align: center;
}
.refresh-badge__pulse {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--amber);
  animation: wd-pulse 2.6s var(--ease) infinite;
}
.refresh-badge__link {
  color: var(--cyber);
  border-bottom: 1px solid rgba(63, 224, 212, 0.4);
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease);
}
.refresh-badge__link:hover { color: var(--cream); border-color: var(--cream); }

@keyframes wd-pulse {
  0%, 100% { opacity: 1; transform: scale(1); box-shadow: 0 0 0 0 rgba(255, 138, 61, 0.5); }
  50% { opacity: 0.68; transform: scale(0.82); box-shadow: 0 0 0 7px rgba(255, 138, 61, 0); }
}

/* ==========================================================================
   页脚
   ========================================================================== */
.site-footer {
  position: relative;
  z-index: 10;
  margin-top: clamp(56px, 9vw, 96px);
  padding: clamp(40px, 6vw, 64px) 0 28px;
  border-top: 1px solid var(--line-strong);
  background: linear-gradient(180deg, rgba(18, 54, 42, 0.72), rgba(11, 31, 23, 1));
}

.footer-shell {
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.footer-grid {
  display: grid;
  grid-template-columns: minmax(250px, 1.7fr) repeat(3, minmax(140px, 1fr));
  gap: 40px 32px;
  padding-bottom: 34px;
  border-bottom: 1px solid var(--line);
}

.footer-brand {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 19px;
  line-height: 1.4;
  letter-spacing: -0.01em;
  color: var(--cream);
}

.footer-intro {
  margin-top: 14px;
  max-width: 38ch;
  font-size: 14px;
  line-height: 1.8;
  color: var(--index);
}

.footer-contact {
  display: grid;
  gap: 10px;
  margin-top: 22px;
}
.footer-contact__item {
  display: flex;
  gap: 12px;
  align-items: baseline;
  font-size: 14px;
  line-height: 1.65;
  color: var(--silver);
}
.footer-contact__key {
  flex: 0 0 42px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--index);
}
.footer-contact__val { word-break: break-word; }

.footer-col__title {
  margin-bottom: 16px;
  padding-bottom: 9px;
  border-bottom: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 0.2em;
  color: var(--index);
}

.footer-list { display: grid; gap: 10px; }

.footer-link {
  display: inline-block;
  font-size: 14px;
  color: var(--silver);
  transition: color 0.2s var(--ease), padding-left 0.2s var(--ease);
}
.footer-link:hover { color: var(--cyber); padding-left: 6px; }

.footer-rhythm {
  margin-top: 20px;
  padding: 13px 14px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(31, 122, 85, 0.14);
}
.footer-rhythm__head {
  display: flex;
  align-items: center;
  gap: 9px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--cream);
}
.footer-rhythm__dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--amber);
  animation: wd-pulse 2.6s var(--ease) infinite;
}
.footer-rhythm__meta {
  margin-top: 7px;
  font-size: 12px;
  color: var(--index);
}

.footer-base {
  display: grid;
  gap: 14px;
  padding-top: 22px;
}
.footer-base__note {
  max-width: 66ch;
  font-size: 12.5px;
  line-height: 1.75;
  color: var(--index);
}
.footer-base__row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 22px;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--index);
}
.footer-base__icp { color: var(--silver); }

/* ==========================================================================
   通用排版
   ========================================================================== */
.display {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(40px, 7.2vw, 76px);
  line-height: 1.02;
  letter-spacing: -0.02em;
  color: var(--cream);
}

.h-page {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(32px, 5vw, 54px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--cream);
}

.h-section {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(21px, 2.6vw, 26px);
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--cream);
}

.index-line {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--index);
}

.lede {
  max-width: 60ch;
  font-size: clamp(16px, 1.6vw, 18px);
  line-height: 1.8;
  color: var(--silver);
}

.prose {
  max-width: 68ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--silver);
}
.prose > p + p { margin-top: 1.05em; }
.prose h2 {
  margin: 1.9em 0 0.7em;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 22px;
  line-height: 1.4;
  letter-spacing: -0.01em;
  color: var(--cream);
}
.prose h3 {
  margin: 1.5em 0 0.5em;
  font-size: 17px;
  font-weight: 700;
  color: var(--cream);
}
.prose ul, .prose ol { margin: 0.8em 0 0 1.1em; }
.prose ul li { list-style: none; position: relative; padding-left: 18px; }
.prose ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.78em;
  width: 9px;
  height: 1.5px;
  background: var(--signal);
}
.prose ol { list-style: decimal; }
.prose ol li { padding-left: 4px; }
.prose li + li { margin-top: 0.45em; }
.prose a {
  color: var(--cyber);
  border-bottom: 1px solid rgba(63, 224, 212, 0.4);
}
.prose strong { color: var(--cream); font-weight: 700; }
.prose code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  padding: 2px 6px;
  border-radius: 6px;
  background: rgba(31, 122, 85, 0.22);
  color: var(--cream);
}

/* ==========================================================================
   布局容器与网格
   ========================================================================== */
.page-shell {
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding: clamp(26px, 4.5vw, 60px) var(--gutter) 0;
}

.grid { display: grid; gap: clamp(16px, 2.4vw, 28px); }
.grid--7-5 { grid-template-columns: 7fr 5fr; }
.grid--8-4 { grid-template-columns: 8fr 4fr; }
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }

/* ---------- 面包屑 ---------- */
.breadcrumb {
  margin-bottom: 18px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--index);
}
.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}
.breadcrumb li { display: flex; align-items: center; gap: 8px; }
.breadcrumb li + li::before {
  content: "/";
  color: var(--line-strong);
}
.breadcrumb a { color: var(--index); transition: color 0.2s var(--ease); }
.breadcrumb a:hover { color: var(--cyber); }
.breadcrumb [aria-current="page"] { color: var(--silver); }

/* ==========================================================================
   堆叠画板
   ========================================================================== */
.panel {
  position: relative;
  padding: clamp(22px, 3vw, 36px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(160deg, rgba(18, 54, 42, 0.92), rgba(11, 31, 23, 0.88));
  box-shadow: var(--shadow-1);
}
.panel__layer {
  position: absolute;
  top: 12px;
  left: 16px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--index);
}
.panel--raised {
  padding-top: clamp(38px, 4.4vw, 52px);
  border-color: var(--line-strong);
}
.panel--cream {
  border-color: rgba(36, 26, 21, 0.22);
  background: linear-gradient(150deg, var(--cream), #E9DCc4);
  color: var(--ink);
  box-shadow: 0 22px 44px -32px rgba(0, 0, 0, 0.8);
}
.panel--cream .h-section,
.panel--cream .h-page,
.panel--cream .display { color: var(--ink); }
.panel--cream .index-line,
.panel--cream .panel__layer { color: rgba(36, 26, 21, 0.55); }
.panel--cream .lede,
.panel--cream .prose { color: rgba(36, 26, 21, 0.82); }
.panel--cream a:not(.btn) { color: var(--cinnabar); }

/* ==========================================================================
   标签与按钮
   ========================================================================== */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px;
  border-radius: 999px;
  border: 1px solid rgba(216, 67, 42, 0.5);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--cinnabar);
  background: rgba(216, 67, 42, 0.08);
}
.tag--green {
  border-color: rgba(31, 122, 85, 0.6);
  color: #6FCFA2;
  background: rgba(31, 122, 85, 0.16);
}
.tag--cyan {
  border-color: rgba(63, 224, 212, 0.5);
  color: var(--cyber);
  background: rgba(63, 224, 212, 0.08);
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 22px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--silver);
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease), background 0.2s var(--ease);
}
.btn:hover {
  border-color: var(--cyber);
  color: var(--cream);
  background: rgba(63, 224, 212, 0.08);
}
.btn--primary {
  border-color: var(--amber);
  background: var(--amber);
  color: var(--ink);
  font-weight: 700;
}
.btn--primary:hover {
  background: #FFA05F;
  border-color: #FFA05F;
  color: var(--ink);
}
.btn--ghost {
  border-color: transparent;
  border-bottom: 1px solid var(--line-strong);
  border-radius: 0;
  padding: 6px 2px;
}
.btn--ghost:hover { border-color: var(--cyber); background: none; }

/* ==========================================================================
   图片容器基础规则
   ========================================================================== */
.media-frame {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 10;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(140deg, rgba(31, 122, 85, 0.4), rgba(11, 31, 23, 0.94) 62%);
}
.media-frame > img,
.media-frame > video,
.media-frame > picture > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(to right, rgba(63, 224, 212, 0.14) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(63, 224, 212, 0.14) 1px, transparent 1px);
  background-size: 56px 56px;
  mix-blend-mode: screen;
  opacity: 0.7;
}
.media-frame--wide { aspect-ratio: 21 / 9; }
.media-frame--tall { aspect-ratio: 4 / 5; }
.media-frame--square { aspect-ratio: 1 / 1; }
.media-frame--cream {
  background: linear-gradient(140deg, var(--cream), #E3D4B8);
  border-color: rgba(36, 26, 21, 0.2);
}
.media-frame--cream::after { mix-blend-mode: multiply; opacity: 0.35; }

/* ==========================================================================
   显现动效
   ========================================================================== */
[data-js="on"] [data-reveal] {
  opacity: 0;
  transform: translate3d(-14px, 16px, 0);
  transition: opacity 0.32s var(--ease), transform 0.32s var(--ease);
}
[data-js="on"] [data-reveal][data-revealed] {
  opacity: 1;
  transform: none;
}

/* ==========================================================================
   标签页基础（页面阶段使用 data-tabs / data-tab / data-panel）
   ========================================================================== */
[data-tabs] [role="tablist"] {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}
[data-tabs] [role="tab"] {
  padding: 8px 16px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--index);
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), background 0.2s var(--ease);
}
[data-tabs] [role="tab"]:hover { color: var(--cream); border-color: var(--line-strong); }
[data-tabs] [role="tab"][aria-selected="true"] {
  color: var(--cyber);
  border-color: rgba(63, 224, 212, 0.5);
  background: rgba(63, 224, 212, 0.08);
}
[data-tabs] [role="tabpanel"] { padding-top: 20px; }

/* ==========================================================================
   响应式
   ========================================================================== */
@media (max-width: 1080px) {
  .axis-rail { display: none; }
}

@media (max-width: 1024px) {
  .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 900px) {
  .nav-toggle { display: inline-flex; }

  .masthead { padding-top: 22px; }

  .masthead__toolbar {
    position: static;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 18px;
  }

  .masthead__nav {
    display: none;
    margin-top: 16px;
    padding-top: 4px;
    border-top: 1px solid var(--line);
  }
  .masthead__nav[data-open] { display: block; }

  .masthead__nav-list {
    flex-direction: column;
    align-items: stretch;
  }
  .masthead__nav-list > li { display: block; }
  .masthead__nav-list > li + li::before { display: none; }

  .masthead__nav-link {
    display: block;
    padding: 14px 6px;
    border-bottom: 1px solid var(--line);
    font-size: 16px;
    text-align: left;
  }
  .masthead__nav-link::after { display: none; }
  .masthead__nav-link[aria-current="page"] {
    color: var(--cyber);
    padding-left: 22px;
  }
  .masthead__nav-link[aria-current="page"]::before {
    content: "";
    position: absolute;
    left: 4px;
    top: 50%;
    width: 11px;
    height: 2px;
    background: var(--cyber);
    transform: translateY(-50%);
    box-shadow: 0 0 10px var(--cyber);
  }

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

@media (max-width: 640px) {
  body {
    background-size: 64px 64px;
    background-attachment: scroll;
  }

  .footer-grid { grid-template-columns: minmax(0, 1fr); gap: 32px; }

  .footer-contact__item { flex-direction: column; gap: 2px; }
  .footer-contact__key { flex: none; }

  .refresh-badge { font-size: 11px; letter-spacing: 0.04em; gap: 8px; }

  .masthead__sub { letter-spacing: 0.18em; font-size: 11px; }
}

/* ==========================================================================
   减少动态
   ========================================================================== */
@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-js="on"] [data-reveal] {
    opacity: 1;
    transform: none;
  }

  .scroll-progress { transition: none; }
}