/* ============================================================
   安博看台 · 共享样式表 /assets/site.css
   夜场看台 × 数据仪表盘：蓝图网格、珠宝色分区、等宽数字
   ============================================================ */

/* ---------- 1. Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body, h1, h2, h3, h4, p, ul, ol, figure, blockquote { margin: 0; }
ul[class], ol[class] { padding: 0; list-style: none; }
img, svg { display: block; max-width: 100%; }
button { font: inherit; color: inherit; }
a { color: inherit; }

/* ---------- 2. 变量 ---------- */
:root {
  --ink: #0A0E27;
  --panel: #12151F;
  --violet: #241B45;
  --wine: #4A1B33;
  --mint: #2BF0C2;
  --amber: #FF8A3D;
  --text: #E9EEF9;
  --muted: #9AA6C6;
  --line: #2C3766;
  --gold: #F2C94C;
  --teal: #0E7C6B;

  --line-soft: rgba(44, 55, 102, 0.55);
  --line-faint: rgba(44, 55, 102, 0.3);

  --r-xl: 28px;
  --r-lg: 22px;
  --r-md: 16px;
  --r-pill: 999px;

  --shell: 1200px;
  --pad: clamp(16px, 4vw, 40px);

  --font-head: "Noto Sans SC", "HarmonyOS Sans", "PingFang SC", system-ui, -apple-system, "Segoe UI", "Microsoft YaHei", sans-serif;
  --font-mono: "JetBrains Mono", "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --ease: cubic-bezier(.22, .61, .36, 1);
}

/* ---------- 3. 基础排版 ---------- */
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  background-color: var(--ink);
  color: var(--text);
  font-family: var(--font-head);
  font-size: 17px;
  line-height: 1.75;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(to right, rgba(44, 55, 102, 0.34) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(44, 55, 102, 0.26) 1px, transparent 1px);
  background-size: 88px 88px;
  -webkit-mask-image: radial-gradient(125% 85% at 50% 0%, #000 0%, rgba(0, 0, 0, 0.35) 55%, transparent 82%);
  mask-image: radial-gradient(125% 85% at 50% 0%, #000 0%, rgba(0, 0, 0, 0.35) 55%, transparent 82%);
  opacity: 0.75;
}

h1, h2, h3, h4 {
  font-weight: 800;
  line-height: 1.18;
  letter-spacing: -0.02em;
  margin: 0 0 0.6em;
}

p { margin: 0 0 1em; }
p:last-child { margin-bottom: 0; }

a { color: var(--mint); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: var(--text); }

strong { color: var(--text); font-weight: 700; }

[id] { scroll-margin-top: 140px; }

/* ---------- 4. 工具类 ---------- */
.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

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

.num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum" 1;
  letter-spacing: -0.01em;
}

.measure { max-width: 68ch; }

.lead {
  font-size: clamp(1.05rem, 1.5vw, 1.22rem);
  line-height: 1.8;
  color: var(--text);
}

.rule {
  height: 1px;
  border: 0;
  margin: clamp(28px, 4vw, 52px) 0;
  background: linear-gradient(90deg, transparent, var(--line-soft) 18%, var(--line-soft) 82%, transparent);
}

/* ---------- 5. 蓝图网格 ---------- */
.grid-12 {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: clamp(16px, 2vw, 24px);
}

.col-3 { grid-column: span 3; }
.col-4 { grid-column: span 4; }
.col-5 { grid-column: span 5; }
.col-6 { grid-column: span 6; }
.col-7 { grid-column: span 7; }
.col-8 { grid-column: span 8; }
.col-12 { grid-column: span 12; }

/* ---------- 6. 头部 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(10, 14, 39, 0.9);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line-soft);
}

.skip-link {
  position: absolute;
  left: 16px;
  top: -70px;
  z-index: 60;
  display: inline-block;
  padding: 10px 20px;
  border-radius: var(--r-pill);
  background: var(--mint);
  color: #04191A;
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
  transition: top 0.2s var(--ease);
}
.skip-link:focus { top: 12px; color: #04191A; }

.progress-rail {
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: rgba(44, 55, 102, 0.45);
}
.progress-bar {
  display: block;
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--mint), var(--amber));
  box-shadow: 0 0 14px rgba(43, 240, 194, 0.55);
  transition: width 0.12s linear;
}

.utility-bar { border-bottom: 1px solid var(--line-faint); }

.utility-inner {
  max-width: var(--shell);
  margin-inline: auto;
  padding: 10px var(--pad) 8px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.progress-readout {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}
.readout-value {
  color: var(--mint);
  font-size: 13px;
  font-weight: 700;
}

/* 复制邮箱胶囊 */
.copy-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  max-width: min(360px, 62vw);
  padding: 8px 15px;
  border: 1px solid rgba(43, 240, 194, 0.34);
  border-radius: var(--r-pill);
  background: rgba(43, 240, 194, 0.07);
  color: var(--mint);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.04em;
  line-height: 1;
  cursor: pointer;
  transition: transform 0.2s var(--ease), background 0.2s, border-color 0.2s, color 0.2s;
}
.copy-chip:hover {
  transform: scale(1.02);
  background: rgba(43, 240, 194, 0.15);
  border-color: var(--mint);
}
.copy-chip[data-copied] {
  border-color: var(--amber);
  background: rgba(255, 138, 61, 0.16);
  color: var(--amber);
}
.copy-chip-dot {
  flex: none;
  width: 7px; height: 7px;
  border-radius: 50%;
  background: currentColor;
  box-shadow: 0 0 10px currentColor;
}
.copy-chip-text {
  font-family: var(--font-mono);
  font-size: 12px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.copy-chip-short { display: none; }
.copy-chip--muted {
  background: transparent;
  border-color: var(--line-soft);
  color: var(--muted);
  padding: 6px 13px;
}
.copy-chip--muted:hover {
  color: var(--mint);
  background: rgba(43, 240, 194, 0.1);
}

/* 刊头 */
.masthead {
  position: relative;
  max-width: var(--shell);
  margin-inline: auto;
  padding: 8px var(--pad) 12px;
  text-align: center;
}
.masthead-brand {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: 5px;
  text-decoration: none;
  color: var(--text);
  transition: color 0.2s;
}
.masthead-brand:hover { color: var(--text); }
.masthead-title {
  font-size: clamp(1.75rem, 4.6vw, 2.7rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1;
}
.masthead-accent { color: var(--mint); }
.masthead-note {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--muted);
}

/* 移动导航按钮 */
.nav-toggle {
  display: none;
  position: absolute;
  right: var(--pad);
  top: 50%;
  transform: translateY(-50%);
  width: 46px; height: 46px;
  padding: 0;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line-soft);
  border-radius: var(--r-md);
  background: rgba(18, 21, 31, 0.92);
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s;
}
.nav-toggle:hover { border-color: var(--mint); }
.nav-toggle-bars {
  position: relative;
  display: block;
  width: 18px; height: 2px;
  background: var(--text);
  transition: background 0.2s var(--ease);
}
.nav-toggle-bars::before,
.nav-toggle-bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 18px; height: 2px;
  background: var(--text);
  transition: transform 0.24s var(--ease), top 0.24s var(--ease), background 0.2s;
}
.nav-toggle-bars::before { top: -6px; }
.nav-toggle-bars::after { top: 6px; }
.nav-toggle[aria-expanded="true"] { border-color: var(--mint); background: rgba(43, 240, 194, 0.12); }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars { background: transparent; }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::before { top: 0; transform: rotate(45deg); background: var(--mint); }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::after { top: 0; transform: rotate(-45deg); background: var(--mint); }

/* ---------- 7. 导航 ---------- */
.site-nav {
  position: relative;
  border-top: 1px solid var(--line-faint);
  transition: background 0.24s var(--ease);
}
.nav-inner {
  position: relative;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--pad);
  min-height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.nav-panel {
  position: relative;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
}
.nav-list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 2px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.nav-link {
  position: relative;
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  padding: 18px 13px;
  color: var(--muted);
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  transition: color 0.2s;
}
.nav-link::after {
  content: "";
  position: absolute;
  left: 13px; right: 13px; bottom: 10px;
  height: 2px;
  border-radius: 2px;
  background: var(--mint);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform 0.24s var(--ease);
}
.nav-link:hover { color: var(--text); }
.nav-link:hover::after { transform: scaleX(1); }
.nav-link[aria-current="page"] { color: var(--text); }
.nav-link[aria-current="page"]::after {
  transform: scaleX(1);
  box-shadow: 0 0 12px rgba(43, 240, 194, 0.8);
}
.nav-idx {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  color: rgba(43, 240, 194, 0.6);
}
.nav-link[aria-current="page"] .nav-idx { color: var(--amber); }

.nav-cta {
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
}
.nav-cta:hover { transform: translateY(-50%) scale(1.02); }

/* ---------- 8. 页脚 ---------- */
.site-footer {
  position: relative;
  z-index: 1;
  margin-top: clamp(48px, 8vw, 96px);
  background: linear-gradient(180deg, #070A1B 0%, var(--panel) 100%);
  border-top: 1px solid var(--line-soft);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr repeat(4, minmax(0, 1fr));
  gap: clamp(20px, 3vw, 40px);
  padding: clamp(40px, 6vw, 72px) 0 clamp(20px, 3vw, 32px);
}

.footer-mark {
  font-size: clamp(1.4rem, 3vw, 1.85rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin: 0 0 8px;
}
.footer-tagline {
  max-width: 26ch;
  margin: 0 0 14px;
  font-size: 14px;
  color: var(--muted);
  line-height: 1.7;
}
.footer-stamp {
  margin: 0;
  font-size: 11px;
  letter-spacing: 0.22em;
  color: rgba(43, 240, 194, 0.75);
}

.footer-col-title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--mint);
}
.footer-list {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.footer-link {
  font-size: 14.5px;
  color: var(--muted);
  text-decoration: none;
  transition: color 0.2s, padding-left 0.2s var(--ease);
}
.footer-link:hover { color: var(--text); padding-left: 4px; }

.footer-contact {
  display: grid;
  gap: 12px;
  margin-top: clamp(20px, 3vw, 34px);
  padding: clamp(18px, 2.6vw, 26px);
  border: 1px solid var(--line-soft);
  border-radius: var(--r-lg);
  background: rgba(18, 21, 31, 0.72);
}
.footer-contact-item {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin: 0;
  font-size: 14px;
}
.footer-contact-key {
  min-width: 74px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--amber);
}
.footer-contact-value { color: var(--text); }

.footer-base {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: clamp(20px, 3vw, 32px);
  padding: 18px 0 clamp(26px, 4vw, 40px);
  border-top: 1px solid var(--line-faint);
  font-size: 13px;
  color: var(--muted);
}
.footer-base p { margin: 0; }
.footer-legal .num { color: var(--muted); }

/* ---------- 9. 通用组件 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 13px 24px;
  border: 1px solid transparent;
  border-radius: var(--r-pill);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.01em;
  line-height: 1;
  text-decoration: none;
  cursor: pointer;
  transition: transform 0.2s var(--ease), box-shadow 0.24s, background 0.2s, color 0.2s, border-color 0.2s;
}
.btn-primary {
  background: var(--amber);
  color: #1B0C02;
  box-shadow: 0 10px 26px rgba(255, 138, 61, 0.26);
}
.btn-primary:hover {
  transform: scale(1.02);
  color: #1B0C02;
  box-shadow: 0 14px 34px rgba(255, 138, 61, 0.4);
}
.btn-ghost {
  background: transparent;
  border-color: rgba(43, 240, 194, 0.45);
  color: var(--mint);
}
.btn-ghost:hover {
  transform: scale(1.02);
  background: rgba(43, 240, 194, 0.12);
  border-color: var(--mint);
  color: var(--mint);
}
.btn-sm { padding: 9px 17px; font-size: 13px; }

.pill-row { display: flex; flex-wrap: wrap; gap: 8px; }
.pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 15px;
  border: 1px solid var(--line-soft);
  border-radius: var(--r-pill);
  background: rgba(18, 21, 31, 0.7);
  color: var(--muted);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.07em;
  line-height: 1.4;
  text-decoration: none;
  cursor: pointer;
  transition: transform 0.2s var(--ease), border-color 0.2s, color 0.2s, background 0.2s;
}
.pill:hover { transform: scale(1.02); border-color: var(--mint); color: var(--text); }
.pill.is-active {
  background: rgba(43, 240, 194, 0.14);
  border-color: var(--mint);
  color: var(--mint);
}

.panel {
  position: relative;
  padding: clamp(18px, 2.6vw, 28px);
  border: 1px solid var(--line-soft);
  border-radius: var(--r-xl);
  background: linear-gradient(160deg, rgba(18, 21, 31, 0.96), rgba(18, 21, 31, 0.72));
  box-shadow: inset 0 0 0 1px rgba(43, 240, 194, 0.05), 0 22px 44px -30px rgba(0, 0, 0, 0.95);
}
.panel--violet {
  background: linear-gradient(160deg, rgba(36, 27, 69, 0.94), rgba(18, 21, 31, 0.86));
  border-color: rgba(43, 240, 194, 0.2);
}
.panel--wine {
  background: linear-gradient(160deg, rgba(74, 27, 51, 0.9), rgba(18, 21, 31, 0.86));
  border-color: rgba(255, 138, 61, 0.26);
}
.panel-title {
  margin: 0 0 10px;
  font-size: clamp(1.05rem, 1.8vw, 1.35rem);
  font-weight: 800;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--mint);
}
.eyebrow::before {
  content: "";
  width: 22px; height: 1px;
  background: currentColor;
  opacity: 0.75;
}

.section { position: relative; padding-block: clamp(44px, 7vw, 88px); }
.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  margin-bottom: clamp(20px, 3vw, 34px);
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line-soft);
}
.section-num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--amber);
}
.section-title {
  margin: 0;
  font-size: clamp(1.5rem, 3.4vw, 2.4rem);
}

.toc-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 9px 0;
  font-size: 14px;
  color: var(--muted);
  text-decoration: none;
  transition: color 0.2s;
}
.toc-link:hover { color: var(--text); }
.toc-mark {
  flex: none;
  width: 18px; height: 2px;
  border-radius: 2px;
  background: var(--line);
  transition: background 0.24s, box-shadow 0.24s, width 0.24s;
}
.toc-link[aria-current="true"] { color: var(--mint); }
.toc-link[aria-current="true"] .toc-mark {
  width: 30px;
  background: var(--mint);
  box-shadow: 0 0 12px rgba(43, 240, 194, 0.85);
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
}
.breadcrumb a { color: var(--muted); text-decoration: none; }
.breadcrumb a:hover { color: var(--mint); }
.breadcrumb-sep { color: var(--line); }

.accordion-item {
  overflow: hidden;
  border: 1px solid var(--line-soft);
  border-radius: var(--r-lg);
  background: rgba(18, 21, 31, 0.72);
}
.accordion-trigger {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  width: 100%;
  padding: 18px 22px;
  border: 0;
  background: transparent;
  color: var(--text);
  font-family: var(--font-head);
  font-size: 16px;
  font-weight: 700;
  line-height: 1.5;
  text-align: left;
  cursor: pointer;
  transition: color 0.2s;
}
.accordion-trigger:hover { color: var(--mint); }
.accordion-marker {
  position: relative;
  flex: none;
  width: 14px; height: 14px;
}
.accordion-marker::before,
.accordion-marker::after {
  content: "";
  position: absolute;
  background: var(--mint);
  border-radius: 2px;
  transition: transform 0.24s var(--ease), opacity 0.2s;
}
.accordion-marker::before { top: 6px; left: 0; width: 14px; height: 2px; }
.accordion-marker::after { left: 6px; top: 0; width: 2px; height: 14px; }
.accordion-trigger[aria-expanded="true"] .accordion-marker::after { transform: scaleY(0); opacity: 0; }
.accordion-panel {
  padding: 0 22px 20px;
  color: var(--muted);
  font-size: 15px;
}

[data-tab-panel][hidden] { display: none !important; }

/* ---------- 10. 图片容器 ---------- */
.media-frame {
  position: relative;
  overflow: hidden;
  width: 100%;
  aspect-ratio: 16 / 9;
  border: 1px solid var(--line-soft);
  border-radius: var(--r-xl);
  background: linear-gradient(150deg, var(--violet), var(--ink) 62%, var(--panel));
}
.media-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(180deg, rgba(10, 14, 39, 0) 40%, rgba(10, 14, 39, 0.6) 100%);
}
.media-frame.is-16x9 { aspect-ratio: 16 / 9; }
.media-frame.is-4x3 { aspect-ratio: 4 / 3; }
.media-frame.is-3x4 { aspect-ratio: 3 / 4; }
.media-frame.is-1x1 { aspect-ratio: 1 / 1; }

/* ---------- 11. 动效与显现 ---------- */
[data-reveal] { opacity: 1; transform: none; }
html.js [data-reveal] {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.32s var(--ease), transform 0.32s var(--ease);
}
html.js [data-reveal][data-revealed] { opacity: 1; transform: none; }

/* ---------- 12. 焦点可见 ---------- */
:focus-visible {
  outline: 2px solid var(--mint);
  outline-offset: 3px;
  border-radius: 8px;
}
.skip-link:focus-visible { outline-offset: 2px; }

/* ---------- 13. 响应式 ---------- */
@media (max-width: 1100px) and (min-width: 901px) {
  .nav-link { padding: 18px 9px; font-size: 14px; }
  .nav-link::after { left: 9px; right: 9px; }
  .nav-cta { padding: 10px 17px; font-size: 13px; }
}

@media (max-width: 960px) {
  .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-brand { grid-column: 1 / -1; }
}

@media (max-width: 900px) {
  body { font-size: 16px; }
  [id] { scroll-margin-top: 120px; }

  .masthead { padding: 6px var(--pad) 10px; }
  .masthead-title { font-size: clamp(1.35rem, 6vw, 1.7rem); }
  .masthead-note { font-size: 9.5px; letter-spacing: 0.16em; }

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

  .site-nav { border-top: 1px solid var(--line-faint); }
  .site-nav[data-open] {
    background: rgba(18, 21, 31, 0.98);
    border-bottom: 1px solid rgba(43, 240, 194, 0.3);
  }

  .nav-inner { min-height: 0; padding-inline: 0; }
  .nav-panel {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.34s var(--ease);
  }
  .site-nav[data-open] .nav-panel { max-height: 640px; }

  .nav-list {
    flex-direction: column;
    gap: 0;
    padding: 6px var(--pad) 4px;
  }
  .nav-link {
    justify-content: flex-start;
    padding: 15px 4px;
    font-size: 16px;
    border-bottom: 1px solid var(--line-faint);
  }
  .nav-link::after { left: 4px; right: auto; width: 34px; bottom: 6px; transform-origin: left center; }
  .nav-cta {
    position: static;
    transform: none;
    margin: 14px var(--pad) 18px;
    justify-content: center;
  }
  .nav-cta:hover { transform: scale(1.02); }

  .grid-12 { grid-template-columns: repeat(6, minmax(0, 1fr)); }
  .col-3, .col-4, .col-5, .col-6, .col-7, .col-8, .col-12 { grid-column: span 6; }

  .section-head { padding-bottom: 12px; }
}

@media (max-width: 720px) {
  .copy-chip-text { display: none; }
  .copy-chip-short { display: inline; }
}

@media (max-width: 600px) {
  .grid-12 { grid-template-columns: 1fr; }
  .col-3, .col-4, .col-5, .col-6, .col-7, .col-8, .col-12 { grid-column: auto; }

  .footer-grid { grid-template-columns: 1fr; }
  .footer-contact-item { display: grid; gap: 6px; }
  .footer-contact-key { min-width: 0; }

  .panel { border-radius: var(--r-lg); }
  .media-frame { border-radius: var(--r-lg); }
}

/* ---------- 14. 降低动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
  html.js [data-reveal] { opacity: 1; transform: none; }
  .progress-bar { transition: none; }
  .nav-panel { transition: none; }
}