/* ==========================================================================
   乐球主站 · 共享站点样式  /assets/site.css
   结构：变量 → 重置 → 排版 → 通用组件 → 页头 → 页脚 → 响应式 → 无障碍
   ========================================================================== */

/* --- 1. 变量 -------------------------------------------------------------- */
:root {
  --lq-blue: #1F4BFF;
  --lq-blue-ink: #0F2BD1;
  --lq-orange: #FF6A1A;
  --lq-void: #0E1116;
  --lq-graphite: #1B2029;
  --lq-paper: #F5F6F8;
  --lq-ink: #12151C;
  --lq-line: #C9CED8;

  --lq-jade: #0FB98A;
  --lq-jade-deep: #087A5C;
  --lq-amber: #E8A200;
  --lq-amber-deep: #8A5A00;
  --lq-rose: #E23A6B;
  --lq-rose-deep: #B31249;

  --lq-tier: linear-gradient(90deg, #1F4BFF 0%, #6D3BFF 52%, #FF6A1A 100%);

  --lq-font-serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "SimSun", Georgia, "Times New Roman", serif;
  --lq-font-sans: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --lq-font-mono: "JetBrains Mono", "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --lq-shell-max: 1440px;
  --lq-gutter: 24px;
  --lq-header-h: 56px;

  --lq-ease: cubic-bezier(.2, .7, .3, 1);
  --lq-t: 180ms;
}

/* --- 2. 重置 -------------------------------------------------------------- */
*,
*::before,
*::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--lq-header-h) + 12px);
}

body {
  margin: 0;
  background: var(--lq-paper);
  color: var(--lq-ink);
  font-family: var(--lq-font-sans);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-variant-numeric: tabular-nums;
}

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

img { border: 0; }

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

ul,
ol { margin: 0; padding: 0; }

#main-content { scroll-margin-top: calc(var(--lq-header-h) + 12px); }

::selection {
  background: var(--lq-blue);
  color: #fff;
}

/* --- 3. 排版 -------------------------------------------------------------- */
h1, h2, h3, h4, h5, h6 {
  margin: 0 0 .5em;
  font-family: var(--lq-font-serif);
  font-weight: 700;
  line-height: 1.24;
  letter-spacing: -.015em;
  color: inherit;
}

h1 {
  font-size: clamp(32px, 5vw, 64px);
  font-weight: 900;
  letter-spacing: -.02em;
}

h2 { font-size: clamp(24px, 3.2vw, 44px); }
h3 { font-size: clamp(19px, 2vw, 24px); }
h4 { font-size: 19px; }

p { margin: 0 0 1.1em; }

a {
  color: var(--lq-blue-ink);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

strong, b { font-weight: 700; }

code, kbd, samp, pre {
  font-family: var(--lq-font-mono);
  font-size: .92em;
  font-variant-numeric: tabular-nums;
}

hr {
  height: 1px;
  margin: 40px 0;
  border: 0;
  background: var(--lq-line);
}

/* --- 4. 通用容器与网格 ---------------------------------------------------- */
.lq-shell {
  width: 100%;
  max-width: var(--lq-shell-max);
  margin: 0 auto;
  padding-left: var(--lq-gutter);
  padding-right: var(--lq-gutter);
}

.lq-grid {
  display: grid;
  gap: 24px;
}

.lq-grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.lq-grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.lq-grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

.lq-band { padding: 80px 0; }
.lq-band--paper { background: var(--lq-paper); color: var(--lq-ink); }
.lq-band--void { background: var(--lq-void); color: var(--lq-paper); }
.lq-band--graphite { background: var(--lq-graphite); color: var(--lq-paper); }

/* --- 5. 正文 -------------------------------------------------------------- */
.lq-prose {
  max-width: 66ch;
  font-size: 17px;
  line-height: 1.75;
  color: var(--lq-ink);
}

.lq-prose > * + * { margin-top: 1.1em; }
.lq-prose h2 { margin-top: 1.8em; }
.lq-prose h3 { margin-top: 1.5em; }
.lq-prose ul,
.lq-prose ol { padding-left: 1.4em; }
.lq-prose li { margin-bottom: .4em; }

.lq-band--void .lq-prose,
.lq-band--graphite .lq-prose { color: var(--lq-paper); }

/* --- 6. 面包屑 ------------------------------------------------------------ */
.lq-crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0 0 24px;
  padding: 0;
  list-style: none;
  font-family: var(--lq-font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: #5B6270;
}

.lq-crumbs li {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.lq-crumbs li + li::before {
  content: "/";
  color: var(--lq-line);
}

.lq-crumbs a { color: var(--lq-blue-ink); }

.lq-crumbs [aria-current="page"] {
  color: var(--lq-ink);
  font-weight: 500;
}

/* --- 7. 按钮 -------------------------------------------------------------- */
.lq-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 20px;
  border: 1px solid var(--lq-blue);
  border-radius: 2px;
  background: var(--lq-blue);
  color: #fff;
  font-family: var(--lq-font-sans);
  font-size: 15px;
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: .01em;
  text-decoration: none;
  cursor: pointer;
  transition: background-color var(--lq-t) var(--lq-ease),
              border-color var(--lq-t) var(--lq-ease),
              color var(--lq-t) var(--lq-ease);
}

.lq-btn:hover {
  background: var(--lq-blue-ink);
  border-color: var(--lq-blue-ink);
  color: #fff;
  text-decoration: none;
}

.lq-btn--accent {
  background: var(--lq-orange);
  border-color: var(--lq-orange);
  color: var(--lq-ink);
}

.lq-btn--accent:hover {
  background: var(--lq-ink);
  border-color: var(--lq-ink);
  color: var(--lq-orange);
}

.lq-btn--ghost {
  background: transparent;
  border-color: var(--lq-line);
  color: var(--lq-blue-ink);
}

.lq-btn--ghost:hover {
  background: rgba(31, 75, 255, .07);
  border-color: var(--lq-blue);
  color: var(--lq-blue);
}

/* --- 8. 图片容器（供页面阶段放置） ---------------------------------------- */
.lq-figure {
  position: relative;
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--lq-line);
  border-radius: 2px;
  background: var(--lq-void);
}

.lq-figure img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.lq-figure--wide { aspect-ratio: 16 / 9; }
.lq-figure--photo { aspect-ratio: 4 / 3; }
.lq-figure--square { aspect-ratio: 1 / 1; }
.lq-figure--tall { aspect-ratio: 3 / 4; }

.lq-figure--grid {
  background-image:
    linear-gradient(to right, rgba(201, 206, 216, .16) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(201, 206, 216, .16) 1px, transparent 1px);
  background-size: 32px 32px;
}

.lq-figure__cap {
  position: absolute;
  left: 0;
  bottom: 0;
  padding: 6px 10px;
  background: var(--lq-void);
  color: var(--lq-paper);
  font-family: var(--lq-font-mono);
  font-size: 11px;
  letter-spacing: .08em;
}

/* --- 9. 状态芯片与档位条 -------------------------------------------------- */
.lq-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 9px;
  border: 1px solid currentColor;
  border-radius: 2px;
  background: transparent;
  font-family: var(--lq-font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: .06em;
  line-height: 1.5;
  white-space: nowrap;
}

.lq-chip::before {
  content: "";
  width: 6px;
  height: 6px;
  background: currentColor;
  flex: 0 0 auto;
}

.lq-chip--full { color: var(--lq-jade-deep); }
.lq-chip--part { color: var(--lq-amber-deep); }
.lq-chip--expired { color: var(--lq-rose-deep); }

.lq-band--void .lq-chip--full,
.lq-band--graphite .lq-chip--full { color: var(--lq-jade); }

.lq-band--void .lq-chip--part,
.lq-band--graphite .lq-chip--part { color: var(--lq-amber); }

.lq-band--void .lq-chip--expired,
.lq-band--graphite .lq-chip--expired { color: var(--lq-rose); }

.lq-tier {
  height: 8px;
  border-radius: 1px;
  background: var(--lq-tier);
}

/* --- 10. 页头 ------------------------------------------------------------- */
.lq-skip {
  position: fixed;
  top: 0;
  left: var(--lq-gutter);
  z-index: 200;
  padding: 12px 18px;
  background: var(--lq-orange);
  color: var(--lq-ink);
  font-family: var(--lq-font-sans);
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
  border-radius: 0 0 2px 2px;
  transform: translateY(-140%);
  transition: transform var(--lq-t) var(--lq-ease);
}

.lq-skip:focus {
  transform: none;
  text-decoration: none;
}

.lq-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: var(--lq-void);
  color: var(--lq-paper);
  border-bottom: 1px solid rgba(201, 206, 216, .18);
}

.lq-header__inner {
  display: flex;
  align-items: center;
  gap: 20px;
  height: var(--lq-header-h);
}

/* 品牌 */
.lq-brand {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  flex: 0 0 auto;
  color: #fff;
  text-decoration: none;
}

.lq-brand:hover { text-decoration: none; }

.lq-brand__mark {
  font-family: var(--lq-font-serif);
  font-size: 21px;
  font-weight: 900;
  letter-spacing: .04em;
  line-height: 1;
}

.lq-brand__suffix {
  padding-left: 8px;
  border-left: 1px solid rgba(201, 206, 216, .3);
  color: var(--lq-orange);
  font-family: var(--lq-font-sans);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: .22em;
  line-height: 1;
}

.lq-brand__sig {
  display: none;
  margin-left: 14px;
  padding-left: 14px;
  border-left: 1px solid rgba(201, 206, 216, .22);
  color: rgba(245, 246, 248, .5);
  font-family: var(--lq-font-mono);
  font-size: 11px;
  letter-spacing: .06em;
  line-height: 1;
  white-space: nowrap;
}

/* 导航 */
.lq-nav {
  flex: 1 1 auto;
  display: flex;
  justify-content: center;
  min-width: 0;
}

.lq-nav__list {
  display: flex;
  align-items: stretch;
  list-style: none;
  margin: 0;
  padding: 0;
}

.lq-nav__item { display: flex; }

.lq-nav__link {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  height: var(--lq-header-h);
  padding: 0 13px;
  border-bottom: 2px solid transparent;
  color: rgba(245, 246, 248, .72);
  font-family: var(--lq-font-sans);
  font-size: 14px;
  font-weight: 500;
  white-space: nowrap;
  text-decoration: none;
  transition: color var(--lq-t) var(--lq-ease),
              border-color var(--lq-t) var(--lq-ease),
              background-color var(--lq-t) var(--lq-ease);
}

.lq-nav__link:hover {
  background: rgba(245, 246, 248, .05);
  color: #fff;
  border-bottom-color: rgba(255, 106, 26, .55);
  text-decoration: none;
}

.lq-nav__link[aria-current="page"] {
  color: #fff;
  border-bottom-color: var(--lq-orange);
}

.lq-nav__idx {
  color: rgba(245, 246, 248, .36);
  font-family: var(--lq-font-mono);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: .06em;
}

.lq-nav__link[aria-current="page"] .lq-nav__idx { color: var(--lq-orange); }

.lq-nav__label { display: inline-block; }

/* 右侧行动区 */
.lq-header__actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
}

.lq-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  height: 34px;
  padding: 0 14px;
  border: 1px solid rgba(18, 21, 28, .9);
  border-radius: 2px;
  background: var(--lq-orange);
  color: var(--lq-ink);
  font-family: var(--lq-font-sans);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .02em;
  white-space: nowrap;
  text-decoration: none;
  transition: background-color var(--lq-t) var(--lq-ease),
              border-color var(--lq-t) var(--lq-ease),
              color var(--lq-t) var(--lq-ease);
}

.lq-cta:hover {
  background: var(--lq-blue);
  border-color: var(--lq-blue);
  color: #fff;
  text-decoration: none;
}

/* 汉堡按钮 */
.lq-burger {
  display: none;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 34px;
  padding: 0;
  border: 1px solid rgba(201, 206, 216, .34);
  border-radius: 2px;
  background: transparent;
  color: var(--lq-paper);
  cursor: pointer;
  transition: border-color var(--lq-t) var(--lq-ease),
              color var(--lq-t) var(--lq-ease);
}

.lq-burger:hover {
  border-color: var(--lq-orange);
  color: var(--lq-orange);
}

.lq-burger__icon {
  display: grid;
  gap: 4px;
  width: 16px;
}

.lq-burger__icon span {
  display: block;
  height: 2px;
  background: currentColor;
  transition: transform var(--lq-t) var(--lq-ease),
              opacity var(--lq-t) var(--lq-ease);
}

.lq-burger[aria-expanded="true"] .lq-burger__icon span:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

.lq-burger[aria-expanded="true"] .lq-burger__icon span:nth-child(2) {
  opacity: 0;
}

.lq-burger[aria-expanded="true"] .lq-burger__icon span:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

/* 滚动进度刻度 */
.lq-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: rgba(201, 206, 216, .14);
  overflow: hidden;
}

.lq-progress__fill {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, #1F4BFF 0%, #6D3BFF 52%, #FF6A1A 100%);
}

/* 悬浮报修入口 */
.lq-repair {
  position: fixed;
  right: var(--lq-gutter);
  bottom: var(--lq-gutter);
  z-index: 80;
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 13px 18px;
  border: 1px solid var(--lq-ink);
  border-radius: 2px;
  background: var(--lq-orange);
  color: var(--lq-ink);
  font-family: var(--lq-font-sans);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .02em;
  white-space: nowrap;
  text-decoration: none;
  opacity: 0;
  visibility: hidden;
  transform: translateY(6px);
  transition: opacity .2s var(--lq-ease),
              transform .2s var(--lq-ease),
              visibility .2s linear,
              background-color var(--lq-t) var(--lq-ease),
              border-color var(--lq-t) var(--lq-ease),
              color var(--lq-t) var(--lq-ease);
}

.lq-repair[data-visible] {
  opacity: 1;
  visibility: visible;
  transform: none;
}

.lq-repair:hover {
  background: var(--lq-ink);
  border-color: var(--lq-orange);
  color: var(--lq-orange);
  text-decoration: none;
}

.lq-repair__dot {
  width: 7px;
  height: 7px;
  flex: 0 0 auto;
  background: var(--lq-ink);
  transition: background-color var(--lq-t) var(--lq-ease);
}

.lq-repair:hover .lq-repair__dot { background: var(--lq-orange); }

.lq-repair::after {
  content: "";
  position: absolute;
  inset: -5px;
  border: 1px solid var(--lq-orange);
  border-radius: 3px;
  pointer-events: none;
  animation: lq-pulse 2.4s ease-out infinite;
}

@keyframes lq-pulse {
  0%   { opacity: .7; transform: scale(.97); }
  70%  { opacity: 0;  transform: scale(1.04); }
  100% { opacity: 0;  transform: scale(1.04); }
}

.lq-repair:hover::after,
.lq-repair:focus-visible::after { animation-play-state: paused; }

/* --- 11. 页脚 ------------------------------------------------------------- */
.lq-footer {
  position: relative;
  margin-top: 80px;
  background: var(--lq-void);
  color: rgba(245, 246, 248, .74);
  border-top: 1px solid rgba(201, 206, 216, .16);
}

.lq-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: repeating-linear-gradient(90deg,
    rgba(201, 206, 216, .38) 0 1px,
    transparent 1px 24px);
}

.lq-footer__inner {
  padding-top: 56px;
  padding-bottom: 28px;
}

.lq-footer__head {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 1.6fr);
  gap: 48px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(201, 206, 216, .14);
}

.lq-footer__mark {
  display: inline-block;
  margin: 0;
  padding-bottom: 12px;
  border-bottom: 3px solid var(--lq-orange);
  color: #fff;
  font-family: var(--lq-font-serif);
  font-size: 32px;
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: .02em;
}

.lq-footer__sig {
  margin: 14px 0 0;
  color: rgba(245, 246, 248, .44);
  font-family: var(--lq-font-mono);
  font-size: 11px;
  letter-spacing: .12em;
}

.lq-footer__intro {
  margin: 18px 0 0;
  max-width: 46ch;
  color: rgba(245, 246, 248, .66);
  font-size: 15px;
  line-height: 1.75;
}

.lq-footer__nav {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 32px;
}

.lq-footer__coltitle {
  margin: 0 0 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(201, 206, 216, .16);
  color: rgba(245, 246, 248, .48);
  font-family: var(--lq-font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: .18em;
}

.lq-footer__links {
  display: grid;
  gap: 11px;
  list-style: none;
}

.lq-footer__link {
  position: relative;
  display: inline-block;
  padding-left: 0;
  color: rgba(245, 246, 248, .72);
  font-size: 14px;
  text-decoration: none;
  transition: color var(--lq-t) var(--lq-ease),
              padding-left var(--lq-t) var(--lq-ease);
}

.lq-footer__link::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 0;
  height: 1px;
  background: var(--lq-orange);
  transform: translateY(-50%);
  transition: width var(--lq-t) var(--lq-ease);
}

.lq-footer__link:hover {
  padding-left: 14px;
  color: #fff;
  text-decoration: none;
}

.lq-footer__link:hover::before { width: 10px; }

.lq-footer__link[aria-current="page"] {
  padding-left: 14px;
  color: #fff;
}

.lq-footer__link[aria-current="page"]::before { width: 10px; }

/* 联系信息 */
.lq-footer__contact {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 28px 40px;
  padding: 32px 0;
  border-bottom: 1px solid rgba(201, 206, 216, .14);
}

.lq-contact {
  min-width: 0;
}

.lq-contact__label {
  display: block;
  margin-bottom: 8px;
  color: rgba(245, 246, 248, .42);
  font-family: var(--lq-font-mono);
  font-size: 11px;
  letter-spacing: .16em;
}

.lq-contact__value {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  color: #fff;
  font-family: var(--lq-font-mono);
  font-size: 14px;
  letter-spacing: .01em;
  line-height: 1.6;
}

.lq-contact__text {
  word-break: break-all;
}

.lq-contact__note {
  margin: 0 0 8px;
  max-width: 44ch;
  color: rgba(245, 246, 248, .7);
  font-size: 14px;
  line-height: 1.7;
}

.lq-footer__window {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0;
  color: rgba(245, 246, 248, .82);
  font-family: var(--lq-font-mono);
  font-size: 12px;
  letter-spacing: .06em;
}

.lq-footer__window::before {
  content: "";
  width: 6px;
  height: 6px;
  background: var(--lq-jade);
  flex: 0 0 auto;
}

/* 复制按钮 */
.lq-copy {
  appearance: none;
  padding: 4px 9px;
  border: 1px solid rgba(201, 206, 216, .32);
  border-radius: 2px;
  background: transparent;
  color: rgba(245, 246, 248, .72);
  font-family: var(--lq-font-sans);
  font-size: 11px;
  line-height: 1.5;
  cursor: pointer;
  transition: border-color var(--lq-t) var(--lq-ease),
              color var(--lq-t) var(--lq-ease),
              background-color var(--lq-t) var(--lq-ease);
}

.lq-copy:hover {
  border-color: var(--lq-orange);
  color: var(--lq-orange);
  background: rgba(255, 106, 26, .08);
}

.lq-copy[data-copied] {
  border-color: var(--lq-jade);
  color: var(--lq-jade);
  background: rgba(15, 185, 138, .1);
}

/* 备案行 */
.lq-footer__legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 22px;
  padding-top: 24px;
  color: rgba(245, 246, 248, .44);
  font-family: var(--lq-font-mono);
  font-size: 12px;
  letter-spacing: .03em;
}

.lq-footer__icp { white-space: nowrap; }
.lq-footer__copy { white-space: nowrap; }

.lq-footer__legalinks {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 8px 18px;
}

.lq-legal-link {
  color: rgba(245, 246, 248, .66);
  text-decoration: none;
  border-bottom: 1px solid rgba(201, 206, 216, .3);
  transition: color var(--lq-t) var(--lq-ease),
              border-color var(--lq-t) var(--lq-ease);
}

.lq-legal-link:hover {
  color: var(--lq-orange);
  border-bottom-color: var(--lq-orange);
  text-decoration: none;
}

/* --- 12. 焦点反馈（与悬停同等重要） -------------------------------------- */
:focus-visible {
  outline: 2px solid var(--lq-orange);
  outline-offset: 2px;
}

.lq-nav__link:focus-visible {
  outline-offset: -4px;
}

.lq-band--void :focus-visible,
.lq-band--graphite :focus-visible,
.lq-footer :focus-visible {
  outline-color: var(--lq-orange);
}

/* --- 13. 响应式 ----------------------------------------------------------- */
@media (min-width: 1280px) {
  .lq-brand__sig { display: inline-block; }
}

@media (max-width: 1120px) {
  .lq-nav__link { padding: 0 10px; }

  .lq-footer__head {
    grid-template-columns: minmax(0, 1fr);
    gap: 36px;
  }
}

@media (max-width: 900px) {
  .lq-nav {
    position: fixed;
    top: var(--lq-header-h);
    left: 0;
    right: 0;
    display: none;
    max-height: calc(100vh - var(--lq-header-h));
    overflow-y: auto;
    padding: 6px 0 14px;
    background: var(--lq-void);
    border-bottom: 1px solid rgba(201, 206, 216, .2);
  }

  .lq-nav[data-open] { display: block; }

  .lq-nav__list {
    display: block;
    width: 100%;
  }

  .lq-nav__item { display: block; }

  .lq-nav__link {
    height: auto;
    width: 100%;
    padding: 15px var(--lq-gutter);
    border-bottom: 1px solid rgba(201, 206, 216, .12);
    border-left: 3px solid transparent;
    font-size: 15px;
  }

  .lq-nav__link:hover {
    border-bottom-color: rgba(201, 206, 216, .12);
    border-left-color: rgba(255, 106, 26, .5);
    background: rgba(245, 246, 248, .04);
  }

  .lq-nav__link[aria-current="page"] {
    border-bottom-color: rgba(201, 206, 216, .12);
    border-left-color: var(--lq-orange);
    background: rgba(255, 106, 26, .07);
  }

  .lq-nav__idx { font-size: 11px; }

  .lq-burger { display: inline-flex; }
}

@media (max-width: 780px) {
  :root { --lq-gutter: 16px; }

  .lq-band { padding: 56px 0; }

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

  .lq-footer { margin-top: 56px; }

  .lq-footer__inner {
    padding-top: 40px;
    padding-bottom: 24px;
  }

  .lq-footer__nav {
    grid-template-columns: minmax(0, 1fr);
    gap: 24px;
  }

  .lq-footer__contact { grid-template-columns: minmax(0, 1fr); }

  .lq-footer__mark { font-size: 26px; }

  .lq-repair {
    right: var(--lq-gutter);
    bottom: var(--lq-gutter);
    padding: 12px 15px;
    font-size: 13px;
  }
}

@media (max-width: 480px) {
  h1 { font-size: 30px; }

  .lq-cta {
    height: 32px;
    padding: 0 11px;
    font-size: 12px;
  }

  .lq-brand__mark { font-size: 19px; }

  .lq-footer__legal {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }
}

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

  *,
  *::before,
  *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
    transition-delay: 0ms !important;
  }

  .lq-repair::after {
    animation: none;
    opacity: 0;
  }
}