/* ============================================================
   胜博中心 · 全站共享样式 /assets/site.css
   框架式导航 + 左右分屏骨架 + 玻璃/纸面双层内容
   ============================================================ */

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

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

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

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

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

button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  cursor: pointer;
}

a { color: inherit; text-decoration: none; }

/* ---------- 2. 设计变量 ---------- */
:root {
  /* 品牌色 */
  --ink-900: #071433;
  --ink-800: #0B1F3F;
  --ink-700: #12306B;
  --line-500: #2C4B8C;
  --paper: #F5F1E8;

  --text-bright: #E9F0FB;
  --text-muted: #9FB4D6;

  --cyan: #33F2D0;
  --orange: #FF8A3C;
  --green: #46D39A;
  --amber: #FFC857;

  /* 派生 */
  --cyan-08: rgba(51, 242, 208, .08);
  --cyan-14: rgba(51, 242, 208, .14);
  --cyan-30: rgba(51, 242, 208, .30);
  --glass: rgba(18, 48, 107, .34);
  --glass-deep: rgba(7, 20, 51, .90);

  /* 字体 */
  --font-sans: "Noto Sans SC", "Inter", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, "Courier New", monospace;

  /* 尺寸与节奏 */
  --gutter: clamp(16px, 3vw, 40px);
  --maxw: 1440px;
  --radius: 12px;
  --radius-sm: 8px;
  --nick: 8px 2px 8px 2px;
  --slant: -6deg;
  --ease: cubic-bezier(.22, .61, .36, 1);
  --header-h: 74px;
}

/* ---------- 3. 基础排版 ---------- */
body {
  min-height: 100vh;
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.85;
  color: var(--text-bright);
  background-color: var(--ink-900);
  background-image:
    linear-gradient(rgba(44, 75, 140, .10) 1px, transparent 1px),
    linear-gradient(90deg, rgba(44, 75, 140, .10) 1px, transparent 1px),
    radial-gradient(120% 80% at 84% -12%, rgba(51, 242, 208, .10), transparent 62%),
    radial-gradient(90% 70% at 6% 6%, rgba(18, 48, 107, .55), transparent 64%);
  background-size: 48px 48px, 48px 48px, auto, auto;
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4 {
  font-weight: 900;
  letter-spacing: .02em;
  line-height: 1.18;
  text-wrap: balance;
}

h1 { font-size: clamp(34px, 5.2vw, 66px); line-height: 1.1; }
h2 { font-size: clamp(26px, 3.4vw, 44px); }
h3 { font-size: clamp(20px, 2.2vw, 28px); }
h4 { font-size: 18px; font-weight: 800; }

p { max-width: 68ch; }

strong, b { font-weight: 800; }

::selection {
  background: var(--cyan);
  color: var(--ink-900);
}

/* 焦点环：霓虹青 2px */
:where(a, button, [tabindex]):focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
  border-radius: 4px;
}

#main-content { display: block; }

/* ---------- 4. 布局工具 ---------- */
.container {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding-inline: var(--gutter);
}

.grid-12 {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: clamp(16px, 2vw, 32px);
}

.col-12 { grid-column: span 12; }
.col-7  { grid-column: span 7; }
.col-6  { grid-column: span 6; }
.col-5  { grid-column: span 5; }
.col-4  { grid-column: span 4; }
.col-3  { grid-column: span 3; }
.col-2  { grid-column: span 2; }

/* ---------- 5. 跳过链接 ---------- */
.skip-link {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 300;
  padding: 10px 16px;
  font-size: 14px;
  font-weight: 800;
  color: var(--ink-900);
  background: var(--cyan);
  border-radius: var(--radius-sm);
  transform: translateY(-180%);
  transition: transform .2s var(--ease);
}
.skip-link:focus {
  transform: translateY(0);
}

/* ---------- 6. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 20px;
  font-size: 15px;
  font-weight: 800;
  letter-spacing: .01em;
  white-space: nowrap;
  border: 1px solid transparent;
  border-radius: var(--nick);
  transition:
    background-color .18s var(--ease),
    border-color .18s var(--ease),
    color .18s var(--ease),
    box-shadow .18s var(--ease);
}

.btn-solid {
  color: var(--ink-900);
  background: var(--orange);
  border-color: var(--orange);
}
.btn-solid:hover,
.btn-solid:focus-visible {
  background: #FFA45F;
  border-color: #FFA45F;
  box-shadow: 0 0 0 3px rgba(255, 138, 60, .22);
}

.btn-ghost {
  color: var(--text-bright);
  background: rgba(44, 75, 140, .22);
  border-color: var(--line-500);
}
.btn-ghost:hover,
.btn-ghost:focus-visible {
  color: var(--cyan);
  border-color: var(--cyan);
  background: var(--cyan-08);
}

/* ---------- 7. 站点头部（框架横梁） ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 120;
  background: var(--glass-deep);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line-500);
  box-shadow: 0 22px 44px -34px rgba(0, 0, 0, .95);
}

.site-header__bar {
  position: relative;
  display: flex;
  align-items: center;
  gap: clamp(14px, 2.4vw, 40px);
  max-width: var(--maxw);
  min-height: var(--header-h);
  margin: 0 auto;
  padding-inline: var(--gutter);
}

/* 品牌 */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex: 0 0 auto;
  margin-right: auto;
  padding: 10px 0;
}

.brand-mark {
  display: grid;
  place-items: center;
  flex: 0 0 40px;
  width: 40px;
  height: 40px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--cyan);
  background: linear-gradient(145deg, rgba(51, 242, 208, .20), rgba(18, 48, 107, .78) 70%);
  border: 1px solid var(--line-500);
  border-radius: 11px 3px 11px 3px;
  transition: border-color .18s var(--ease), box-shadow .18s var(--ease);
}
.brand:hover .brand-mark,
.brand:focus-visible .brand-mark {
  border-color: var(--cyan);
  box-shadow: 0 0 0 3px var(--cyan-14);
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.3;
}
.brand-line {
  font-size: 16px;
  font-weight: 800;
  letter-spacing: .02em;
  color: var(--text-bright);
}
.brand-sub {
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--text-muted);
}

/* 主导航 */
.site-nav { flex: 0 1 auto; }

.nav-list {
  display: flex;
  align-items: center;
  gap: clamp(2px, 1.1vw, 16px);
}

.nav-link {
  display: inline-block;
  padding: 8px 10px 10px;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: .01em;
  color: var(--text-muted);
  border-bottom: 2px solid transparent;
  transition:
    color .18s var(--ease),
    border-color .18s var(--ease),
    background-color .18s var(--ease);
}
.nav-link:hover,
.nav-link:focus-visible {
  color: var(--text-bright);
  border-bottom-color: var(--line-500);
}
.nav-link[aria-current="page"] {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

.nav-cta { display: none; }

/* 头部行动区 */
.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
}

/* 汉堡按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  padding: 9px 14px;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .06em;
  color: var(--text-bright);
  border: 1px solid var(--line-500);
  border-radius: var(--nick);
  transition: border-color .18s var(--ease), color .18s var(--ease), background-color .18s var(--ease);
}
.nav-toggle:hover,
.nav-toggle:focus-visible {
  color: var(--cyan);
  border-color: var(--cyan);
  background: var(--cyan-08);
}

.nav-toggle-bars {
  display: grid;
  gap: 4px;
  width: 18px;
}
.nav-toggle-bars span {
  display: block;
  height: 2px;
  background: currentColor;
  transition: transform .2s var(--ease), opacity .2s var(--ease);
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* 滚动进度 */
.scroll-progress {
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--cyan), var(--orange));
  opacity: 0;
  pointer-events: none;
  transition: width .08s linear, opacity .2s var(--ease);
}

/* ---------- 8. 站点页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(56px, 8vw, 120px);
  overflow: hidden;
  background: linear-gradient(180deg, rgba(18, 48, 107, .44), rgba(7, 20, 51, .98) 44%);
  border-top: 1px solid var(--line-500);
}
.site-footer::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 2px;
  background: linear-gradient(90deg, var(--cyan), transparent 58%);
  opacity: .8;
}
.site-footer::after {
  content: "";
  position: absolute;
  top: -22%;
  right: -14%;
  width: 46vw;
  height: 46vw;
  background: radial-gradient(circle, rgba(51, 242, 208, .10), transparent 62%);
  pointer-events: none;
}

.footer-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(280px, 34%) 1fr;
  gap: clamp(32px, 5vw, 84px);
  max-width: var(--maxw);
  margin: 0 auto;
  padding: clamp(44px, 6vw, 76px) var(--gutter) clamp(30px, 4vw, 52px);
}

.footer-brand-line {
  font-size: clamp(20px, 2.2vw, 26px);
  font-weight: 900;
  letter-spacing: .02em;
  color: var(--text-bright);
  max-width: none;
}
.footer-intro {
  margin-top: 12px;
  max-width: 34ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-muted);
}

.footer-contact {
  display: grid;
  gap: 10px;
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid rgba(44, 75, 140, .6);
}

.contact-row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 12px;
  max-width: none;
  font-size: 14px;
}
.contact-label {
  min-width: 2.6em;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--text-muted);
}
.contact-value {
  color: var(--text-bright);
  font-size: 14px;
  word-break: break-word;
}
.contact-value--mono {
  font-family: var(--font-mono);
  font-size: 13.5px;
  letter-spacing: .01em;
  word-break: break-all;
}
.contact-value[data-copy-source] {
  border-bottom: 1px dashed rgba(159, 180, 214, .5);
}

.copy-btn {
  padding: 3px 10px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .06em;
  color: var(--cyan);
  background: transparent;
  border: 1px solid rgba(51, 242, 208, .42);
  border-radius: 6px 1px 6px 1px;
  transition:
    background-color .18s var(--ease),
    border-color .18s var(--ease),
    color .18s var(--ease);
}
.copy-btn:hover,
.copy-btn:focus-visible {
  background: var(--cyan-14);
  border-color: var(--cyan);
}
.copy-btn[data-copied] {
  color: var(--green);
  border-color: rgba(70, 211, 154, .55);
}

.footer-note {
  margin-top: 18px;
  max-width: 46ch;
  font-size: 13px;
  line-height: 1.75;
  color: var(--text-muted);
}

/* 页脚链接列 */
.footer-nav {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(20px, 3vw, 44px);
  align-content: start;
}
.footer-col-title {
  padding-bottom: 12px;
  margin-bottom: 4px;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--cyan);
  border-bottom: 1px solid rgba(44, 75, 140, .6);
}
.footer-links {
  display: grid;
  gap: 2px;
  margin-top: 10px;
}
.footer-links a {
  display: inline-block;
  padding: 6px 0;
  font-size: 15px;
  color: var(--text-muted);
  border-bottom: 1px solid transparent;
  transition: color .18s var(--ease), border-color .18s var(--ease);
}
.footer-links a:hover,
.footer-links a:focus-visible {
  color: var(--cyan);
  border-bottom-color: rgba(51, 242, 208, .5);
}

/* 页脚压条 */
.footer-meta {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 24px;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 18px var(--gutter) 26px;
  border-top: 1px solid rgba(44, 75, 140, .5);
}
.footer-legal,
.footer-copy {
  max-width: none;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .06em;
  color: var(--text-muted);
}

/* ---------- 9. 内容层：玻璃与纸面 ---------- */
.panel-glass {
  padding: clamp(18px, 2.6vw, 32px);
  background: linear-gradient(150deg, rgba(18, 48, 107, .52), rgba(18, 48, 107, .24));
  border: 1px solid rgba(51, 242, 208, .26);
  border-radius: var(--radius);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  box-shadow:
    0 26px 52px -36px rgba(0, 0, 0, .95),
    inset 0 1px 0 rgba(233, 240, 251, .06);
}

.panel-paper {
  padding: clamp(22px, 3.2vw, 46px);
  color: var(--ink-800);
  background: var(--paper);
  border-radius: var(--radius);
  box-shadow: 0 32px 64px -44px rgba(0, 0, 0, .92);
}
.panel-paper h1,
.panel-paper h2,
.panel-paper h3,
.panel-paper h4 { color: var(--ink-900); }
.panel-paper p { color: var(--ink-800); }
.panel-paper a {
  color: var(--ink-700);
  border-bottom: 2px solid rgba(18, 48, 107, .34);
  transition: border-color .18s var(--ease), color .18s var(--ease);
}
.panel-paper a:hover,
.panel-paper a:focus-visible {
  color: var(--ink-900);
  border-bottom-color: var(--ink-900);
}

/* 斜切强调模块 */
.slant-panel {
  position: relative;
  padding: clamp(22px, 3.4vw, 46px);
  background: linear-gradient(150deg, rgba(18, 48, 107, .74), rgba(7, 20, 51, .92));
  border: 1px solid var(--line-500);
  border-radius: 14px 3px 14px 3px;
}
.slant-panel::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: linear-gradient(180deg, var(--cyan), transparent);
  border-radius: 3px 0 0 3px;
}

.slant-divider {
  height: 1px;
  margin: clamp(28px, 4vw, 56px) 0;
  border: 0;
  background: linear-gradient(90deg, transparent, var(--line-500) 18%, var(--cyan) 50%, var(--line-500) 82%, transparent);
  opacity: .55;
  transform: skewY(var(--slant));
  transform-origin: left center;
}

/* ---------- 10. 文字与编号组件 ---------- */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  max-width: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--cyan);
}
.eyebrow::before {
  content: "";
  width: 26px;
  height: 1px;
  background: var(--cyan);
}

.section-num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(38px, 5.4vw, 76px);
  font-weight: 800;
  line-height: .9;
  letter-spacing: .02em;
  color: var(--cyan);
  opacity: .95;
  transition: color .24s var(--ease), opacity .24s var(--ease);
}
.section-num[data-dim] {
  color: var(--text-muted);
  opacity: .45;
}

.annotation {
  max-width: none;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--text-muted);
}
.annotation--vertical {
  writing-mode: vertical-rl;
  text-orientation: mixed;
  letter-spacing: .3em;
  padding: 4px 0;
}

.num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: .02em;
}

.lede {
  max-width: 46ch;
  font-size: clamp(18px, 1.5vw, 21px);
  line-height: 1.75;
  color: var(--text-muted);
}

/* 长文容器 */
.prose {
  max-width: 68ch;
  font-size: 17px;
  line-height: 1.85;
}
.prose > * + * { margin-top: 1.2em; }
.prose h2 { margin-top: 1.8em; }
.prose h3 { margin-top: 1.5em; }
.prose ul { padding-left: 0; }
.prose ul > li {
  position: relative;
  padding-left: 1.6em;
}
.prose ul > li::before {
  content: "";
  position: absolute;
  left: .1em;
  top: .76em;
  width: 7px;
  height: 7px;
  background: var(--cyan);
  border-radius: 1px;
}
.panel-paper .prose ul > li::before { background: var(--ink-700); }
.prose ol {
  padding-left: 1.5em;
  list-style: decimal;
}
.prose a {
  border-bottom: 2px solid rgba(51, 242, 208, .45);
  transition: border-color .18s var(--ease), color .18s var(--ease);
}
.prose a:hover,
.prose a:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}
.panel-paper .prose a {
  color: var(--ink-700);
  border-bottom-color: rgba(18, 48, 107, .34);
}
.panel-paper .prose a:hover,
.panel-paper .prose a:focus-visible {
  color: var(--ink-900);
  border-bottom-color: var(--ink-900);
}

/* ---------- 11. 状态标签 / 面包屑 / 图片容器 ---------- */
.status-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: .04em;
  border: 1px solid currentColor;
  border-radius: 6px 1px 6px 1px;
  background: rgba(255, 255, 255, .03);
}
.status-tag--ok { color: var(--green); }
.status-tag--warn { color: var(--amber); }
.status-tag--accent { color: var(--cyan); }
.status-tag--alert { color: var(--orange); }

.crumbs {
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--text-muted);
}
.crumbs ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}
.crumbs li {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.crumbs li + li::before {
  content: "/";
  color: var(--line-500);
}
.crumbs a {
  color: var(--text-muted);
  border-bottom: 1px solid transparent;
  transition: color .18s var(--ease), border-color .18s var(--ease);
}
.crumbs a:hover,
.crumbs a:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}
.crumbs [aria-current="page"] { color: var(--text-bright); }

/* 响应式图片容器（页面阶段放置图片占位） */
.media-frame {
  position: relative;
  overflow: hidden;
  isolation: isolate;
  border: 1px solid var(--line-500);
  border-radius: 14px 3px 14px 3px;
  background:
    radial-gradient(120% 100% at 18% 0%, rgba(51, 242, 208, .14), transparent 58%),
    linear-gradient(150deg, var(--ink-700), var(--ink-900));
}
.media-frame > img,
.media-frame > svg,
.media-frame > picture,
.media-frame > picture > img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  background-image:
    linear-gradient(rgba(44, 75, 140, 1) 1px, transparent 1px),
    linear-gradient(90deg, rgba(44, 75, 140, 1) 1px, transparent 1px);
  background-size: 40px 40px;
  opacity: .12;
  pointer-events: none;
}
.media-frame--16x9 { aspect-ratio: 16 / 9; }
.media-frame--4x3  { aspect-ratio: 4 / 3; }
.media-frame--1x1  { aspect-ratio: 1 / 1; }
.media-frame--tall { aspect-ratio: 3 / 4; }

.media-frame__caption {
  position: absolute;
  left: 14px;
  bottom: 12px;
  z-index: 2;
  padding: 5px 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .14em;
  color: var(--text-bright);
  background: rgba(7, 20, 51, .74);
  border-left: 2px solid var(--cyan);
}

/* ---------- 12. 进入视口渐显 ---------- */
.js-ready [data-reveal] {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity .24s ease-out, transform .24s ease-out;
}
.js-ready [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

/* ---------- 13. 响应式：桌面 → 平板 → 手机 ---------- */
@media (max-width: 1180px) {
  .header-actions .btn-ghost { display: none; }
}

@media (max-width: 960px) {
  .header-actions { display: none; }

  .nav-toggle {
    display: inline-flex;
  }

  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    display: none;
    max-height: calc(100vh - var(--header-h));
    margin: 0;
    padding: 12px var(--gutter) 22px;
    overflow-y: auto;
    background: rgba(7, 20, 51, .98);
    border-top: 1px solid var(--line-500);
    border-bottom: 1px solid var(--line-500);
    box-shadow: 0 28px 52px -26px rgba(0, 0, 0, .95);
  }
  .site-nav[data-open] { display: block; }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }
  .nav-item + .nav-item {
    border-top: 1px solid rgba(44, 75, 140, .5);
  }

  .nav-link {
    display: block;
    padding: 14px 14px 14px 12px;
    font-size: 17px;
    border-bottom: 0;
    border-left: 2px solid transparent;
    border-radius: 0 6px 6px 0;
  }
  .nav-link:hover,
  .nav-link:focus-visible {
    color: var(--text-bright);
    border-bottom-color: transparent;
    border-left-color: var(--line-500);
    background: rgba(44, 75, 140, .22);
  }
  .nav-link[aria-current="page"] {
    color: var(--cyan);
    border-bottom-color: transparent;
    border-left-color: var(--cyan);
    background: var(--cyan-08);
  }

  .nav-cta {
    display: flex;
    align-items: center;
    justify-content: center;
    margin-top: 18px;
    padding: 13px 18px;
    font-size: 15px;
    font-weight: 800;
    color: var(--ink-900);
    background: var(--orange);
    border-radius: var(--nick);
  }

  .grid-12 > .col-7,
  .grid-12 > .col-6,
  .grid-12 > .col-5,
  .grid-12 > .col-4,
  .grid-12 > .col-3,
  .grid-12 > .col-2 { grid-column: span 12; }
}

@media (max-width: 900px) {
  .footer-inner {
    grid-template-columns: 1fr;
  }
  .footer-intro { max-width: 52ch; }
  .footer-nav { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

@media (max-width: 640px) {
  :root { --header-h: 66px; }

  body { font-size: 16px; }
  .brand-mark { flex-basis: 34px; width: 34px; height: 34px; font-size: 11px; }
  .brand-line { font-size: 15px; }
  .brand-sub { display: none; }

  .footer-nav { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px 18px; }
  .footer-meta { flex-direction: column; align-items: flex-start; }
  .contact-label { min-width: 100%; }
  .annotation--vertical { writing-mode: horizontal-tb; letter-spacing: .14em; }
}

/* ---------- 14. 减弱动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

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

  .js-ready [data-reveal] { opacity: 1; transform: none; }
  .slant-divider { transform: none; }
  .site-nav { scroll-behavior: auto; }
}