/* ============================================================
   LUMINA 风 · 首页（视频背景 + Liquid Glass 页脚）
   移植自 React/Tailwind 设计稿：版式/动画/玻璃 CSS 严格照搬
   ============================================================ */

/* ---------- 字体（onlinewebfonts Helvetica Regular） ---------- */
@font-face {
    font-family: "Helvetica Regular";
    src: url("https://db.onlinewebfonts.com/t/a64ff11d2c24584c767f6257e880dc65.eot");
    src: url("https://db.onlinewebfonts.com/t/a64ff11d2c24584c767f6257e880dc65.eot?#iefix")format("embedded-opentype"),
    url("https://db.onlinewebfonts.com/t/a64ff11d2c24584c767f6257e880dc65.woff2")format("woff2"),
    url("https://db.onlinewebfonts.com/t/a64ff11d2c24584c767f6257e880dc65.woff")format("woff"),
    url("https://db.onlinewebfonts.com/t/a64ff11d2c24584c767f6257e880dc65.ttf")format("truetype"),
    url("https://db.onlinewebfonts.com/t/a64ff11d2c24584c767f6257e880dc65.svg#Helvetica Regular")format("svg");
}

/* ---------- Liquid Glass（照搬，勿改参数） ---------- */
.liquid-glass {
  background: rgba(255, 255, 255, 0.01);
  background-blend-mode: luminosity;
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  border: none;
  box-shadow: inset 0 1px 1px rgba(255, 255, 255, 0.1);
  position: relative;
  overflow: hidden;
}
.liquid-glass::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  padding: 1.4px;
  background: linear-gradient(180deg,
    rgba(255,255,255,0.45) 0%, rgba(255,255,255,0.15) 20%,
    rgba(255,255,255,0) 40%, rgba(255,255,255,0) 60%,
    rgba(255,255,255,0.15) 80%, rgba(255,255,255,0.45) 100%);
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  pointer-events: none;
}

/* ---------- 页面骨架 ---------- */
html, body { margin: 0; padding: 0; }

body {
  background: #000;
  /* --font-sans */
  font-family: "Helvetica Regular", "Helvetica Neue", Helvetica, Arial,
               "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* main: relative w-full min-h-[115vh] overflow-x-hidden flex flex-col items-center font-sans
   selection:bg-white/20 selection:text-white */
.lu-main {
  position: relative;
  width: 100%;
  min-height: 115vh;
  overflow-x: hidden;
  display: flex;
  flex-direction: column;
  align-items: center;
}
.lu-main ::selection { background: rgba(255, 255, 255, 0.2); color: #fff; }

/* video: fixed inset-0 w-full h-full object-cover z-[0] */
.lu-video {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 0;
}

/* 内容层：z-10 max-w-7xl，撑满并把页脚推到底部 */
.lu-shell {
  position: relative;
  z-index: 10;
  width: 100%;
  max-width: 80rem;               /* max-w-7xl */
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
}

/* ---------- 上方 CTA ---------- */
.lu-cta {
  flex: 1;
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 6rem 1.5rem 0;
  box-sizing: border-box;
}
.lu-cta__eyebrow {
  font-size: 11px;
  letter-spacing: 0.35em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.65);
  margin: 0 0 1.5rem;
}
.lu-cta__title {
  font-size: clamp(2.25rem, 6vw, 4.75rem);
  line-height: 1.08;
  font-weight: 500;
  color: #fff;
  margin: 0;
  letter-spacing: -0.02em;
}
.lu-cta__title em { font-style: italic; font-weight: 400; }
.lu-cta__sub {
  max-width: 34rem;
  font-size: 0.9375rem;
  line-height: 1.75;
  color: rgba(255, 255, 255, 0.7);
  margin: 1.5rem 0 0;
}
.lu-cta__actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1rem;
  margin-top: 2.5rem;
}
.lu-cta__btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  color: #fff;
  text-decoration: none;
  padding: 0.75rem 1.75rem;
  border-radius: 9999px;
  transition: transform 0.3s ease, background 0.3s ease, box-shadow 0.3s ease;
}
.lu-cta__btn--glass { background: rgba(255, 255, 255, 0.08); }
.lu-cta__btn--glass:hover {
  background: rgba(255, 255, 255, 0.16);
  transform: translateY(-1px);
}
.lu-cta__btn--ghost { color: rgba(255, 255, 255, 0.8); }
.lu-cta__btn--ghost:hover { color: #fff; }
.lu-cta__btn svg { width: 14px; height: 14px; }

/* ---------- 页脚：motion.footer 入场（opacity 0→1, y 40→0, 1s, delay .4, easeOut） ---------- */
.lu-footer {
  /* liquid-glass w-full rounded-3xl p-6 md:p-10 text-white/70 mt-32 md:mt-64 */
  width: 100%;
  border-radius: 1.5rem;
  padding: 1.5rem;
  color: rgba(255, 255, 255, 0.7);
  margin-top: 8rem;
  box-sizing: border-box;
  opacity: 0;
  animation: lu-footer-in 1s cubic-bezier(0, 0, 0.58, 1) 0.4s both;
}
@keyframes lu-footer-in {
  from { opacity: 0; transform: translateY(40px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* 顶部 12 列网格：grid-cols-1 md:grid-cols-12 gap-10 md:gap-12 mb-10 */
.lu-foot-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
  margin-bottom: 2.5rem;
}
.lu-foot-brand  { min-width: 0; }
.lu-foot-links  { min-width: 0; }

.lu-brand__row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: #fff;
}
.lu-brand__row svg { flex: none; }
.lu-brand__name { font-size: 1.25rem; line-height: 1.75rem; font-weight: 500; margin: 0; }

/* 描述：text-sm leading-relaxed max-w-sm */
.lu-brand__desc {
  font-size: 0.875rem;
  line-height: 1.625;
  max-width: 24rem;
  margin: 1rem 0 0;
}

/* 链接三列 */
.lu-cols {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 2rem;
}
.lu-cols h3 {
  /* text-sm uppercase tracking-wider text-white font-medium mb-4 */
  font-size: 0.875rem;
  line-height: 1.25rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: #fff;
  font-weight: 500;
  margin: 0 0 1rem;
}
.lu-cols ul {
  /* text-xs space-y-2 */
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 0.75rem;
  line-height: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.lu-cols a {
  color: rgba(255, 255, 255, 0.7);
  text-decoration: none;
  transition: color 0.15s ease;
}
.lu-cols a:hover { color: #fff; }

/* 底栏：pt-6 border-t border-white/10 flex flex-col md:flex-row items-center justify-between gap-6 md:gap-4 */
.lu-foot-bar {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}
.lu-foot-credit,
.lu-foot-join-label {
  /* text-[10px] uppercase tracking-widest opacity-50 */
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  opacity: 0.5;
  margin: 0;
}
.lu-foot-right {
  display: flex;
  align-items: center;
  gap: 1rem;
}
.lu-socials {
  display: flex;
  align-items: center;
  gap: 1rem;
}
.lu-socials a {
  display: inline-flex;
  color: rgba(255, 255, 255, 0.7);
  opacity: 0.7;
  transition: color 0.15s ease, opacity 0.15s ease;
}
.lu-socials a:hover { opacity: 1; color: #fff; }
.lu-socials svg { width: 16px; height: 16px; }

/* ---------- 响应式（md = 768px） ---------- */
@media (min-width: 768px) {
  .lu-footer   { padding: 2.5rem; margin-top: 16rem; }
  .lu-foot-grid {
    grid-template-columns: repeat(12, minmax(0, 1fr));
    gap: 3rem;
  }
  .lu-foot-brand { grid-column: span 5 / span 5; }
  .lu-foot-links { grid-column: span 7 / span 7; }
  .lu-foot-bar   { flex-direction: row; gap: 1rem; }
}

/* ---------- 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  .lu-footer { animation: none; opacity: 1; transform: none; }
  .lu-cta__btn { transition: none; }
}

/* ============================================================
   子页面（works / work / contact / 404）— 同风格扩展
   ============================================================ */

/* 首页保持 115vh，子页 100vh */
.lu-main--tall { min-height: 115vh; }
.lu-main--page { min-height: 100vh; }

/* ---------- 玻璃导航（liquid-glass 胶囊） ---------- */
.lu-nav {
  position: fixed;
  top: 1.25rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 50;
  display: flex;
  align-items: center;
  gap: 1.75rem;
  padding: 0.55rem 0.55rem 0.55rem 1.1rem;
  border-radius: 9999px;
  width: max-content;
  max-width: calc(100% - 2rem);
  box-sizing: border-box;
}
.lu-nav__logo {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: #fff;
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
  white-space: nowrap;
}
.lu-nav__logo svg { flex: none; opacity: 0.9; }
.lu-nav__links { display: flex; gap: 1.25rem; }
.lu-nav__links a {
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.65);
  text-decoration: none;
  transition: color 0.2s ease;
  white-space: nowrap;
}
.lu-nav__links a:hover { color: #fff; }
.lu-nav__links a.on { color: #fff; }
.lu-nav__cta {
  font-size: 0.78rem;
  color: #fff;
  text-decoration: none;
  padding: 0.5rem 1.1rem;
  border-radius: 9999px;
  background: rgba(255, 255, 255, 0.1);
  transition: background 0.2s ease;
  white-space: nowrap;
}
.lu-nav__cta:hover { background: rgba(255, 255, 255, 0.22); }
@media (max-width: 640px) {
  .lu-nav { gap: 1rem; }
  .lu-nav__links { display: none; }
}

/* ---------- 内容容器 ---------- */
.lu-content {
  width: 100%;
  padding: 7.5rem 1.5rem 0;
  box-sizing: border-box;
}

/* ---------- 页头 ---------- */
.lu-phead { text-align: center; margin: 0 0 2.75rem; }
.lu-eyebrow {
  font-size: 11px;
  letter-spacing: 0.35em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.55);
  margin: 0 0 1rem;
}
.lu-phead__title {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 500;
  color: #fff;
  margin: 0;
  letter-spacing: -0.02em;
  line-height: 1.15;
}
.lu-phead__title em { font-style: italic; font-weight: 400; opacity: 0.55; }
.lu-phead__desc {
  color: rgba(255, 255, 255, 0.6);
  max-width: 32rem;
  margin: 1rem auto 0;
  font-size: 0.9rem;
  line-height: 1.75;
}

/* ---------- 分类筛选 chips ---------- */
.lu-chips {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.5rem;
  margin: 0 0 2.75rem;
}
.lu-chip {
  font-size: 0.75rem;
  color: rgba(255, 255, 255, 0.7);
  text-decoration: none;
  padding: 0.45rem 1rem;
  border-radius: 9999px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.08);
  transition: color 0.2s ease, background 0.2s ease;
}
.lu-chip:hover { color: #fff; background: rgba(255, 255, 255, 0.12); }
.lu-chip.on { color: #000; background: #fff; border-color: #fff; }

/* ---------- 作品卡片网格 ---------- */
.lu-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.25rem;
}
@media (max-width: 1024px) { .lu-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 640px)  { .lu-grid { grid-template-columns: 1fr; } }

.lu-card {
  display: flex;
  flex-direction: column;
  border-radius: 1.25rem;
  color: inherit;
  text-decoration: none;
  transition: transform 0.3s ease;
  animation: lu-rise 0.8s cubic-bezier(0, 0, 0.58, 1) both;
}
.lu-card:hover { transform: translateY(-4px); }
.lu-card:nth-child(3n + 2) { animation-delay: 0.07s; }
.lu-card:nth-child(3n + 3) { animation-delay: 0.14s; }
@keyframes lu-rise {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: none; }
}

.lu-card__cover {
  position: relative;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.04);
}
.lu-card__cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.5s ease;
}
.lu-card:hover .lu-card__cover img { transform: scale(1.04); }
.lu-card__emoji {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
  opacity: 0.85;
}
.lu-card__cat {
  position: absolute;
  top: 0.75rem;
  left: 0.75rem;
  font-size: 0.65rem;
  letter-spacing: 0.08em;
  color: #fff;
  padding: 0.3rem 0.7rem;
  border-radius: 9999px;
  background: rgba(0, 0, 0, 0.35);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}
.lu-card__star {
  position: absolute;
  top: 0.75rem;
  right: 0.75rem;
  font-size: 0.65rem;
  color: #000;
  padding: 0.3rem 0.7rem;
  border-radius: 9999px;
  background: #fff;
}
.lu-card__body { padding: 1.1rem 1.25rem 1.25rem; display: flex; flex-direction: column; gap: 0.5rem; }
.lu-card__body h3 { font-size: 0.95rem; font-weight: 500; color: #fff; margin: 0; line-height: 1.4; }
.lu-card__sum {
  font-size: 0.78rem;
  line-height: 1.6;
  color: rgba(255, 255, 255, 0.6);
  margin: 0;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.lu-card__meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-top: 0.35rem;
  flex-wrap: wrap;
}
.lu-tags { display: flex; flex-wrap: wrap; gap: 0.35rem; }
.lu-tag {
  font-size: 0.62rem;
  color: rgba(255, 255, 255, 0.65);
  padding: 0.22rem 0.6rem;
  border-radius: 9999px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  white-space: nowrap;
}
.lu-views { font-size: 0.68rem; color: rgba(255, 255, 255, 0.45); white-space: nowrap; }

.lu-empty {
  grid-column: 1 / -1;
  text-align: center;
  color: rgba(255, 255, 255, 0.5);
  font-size: 0.875rem;
  padding: 3rem 0;
}

/* ---------- 作品详情 ---------- */
.lu-article {
  border-radius: 1.5rem;
  padding: 1.75rem;
  margin-bottom: 4rem;
}
@media (min-width: 768px) { .lu-article { padding: 2.5rem; } }
.lu-back {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.55);
  text-decoration: none;
  transition: color 0.2s ease;
}
.lu-back:hover { color: #fff; }
.lu-article__head { margin: 1.5rem 0 0; }
.lu-article__cats { display: flex; gap: 0.5rem; margin-bottom: 1rem; }
.lu-article__cat {
  font-size: 0.65rem;
  letter-spacing: 0.08em;
  color: #fff;
  padding: 0.3rem 0.7rem;
  border-radius: 9999px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.12);
}
.lu-article__cat--star { color: #000; background: #fff; border-color: #fff; }
.lu-article__title {
  font-size: clamp(1.6rem, 4vw, 2.5rem);
  font-weight: 500;
  color: #fff;
  letter-spacing: -0.02em;
  line-height: 1.2;
  margin: 0;
}
.lu-article__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.72rem;
  color: rgba(255, 255, 255, 0.5);
  margin-top: 1rem;
}
.lu-article__cover { margin: 1.75rem 0; }
.lu-article__cover img {
  width: 100%;
  border-radius: 1rem;
  display: block;
}
.lu-article__sum {
  font-size: 0.95rem;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.8);
  margin: 0 0 1.25rem;
}

/* 正文排版（render_text 输出） */
.lu-rich { color: rgba(255, 255, 255, 0.72); font-size: 0.9rem; line-height: 1.9; }
.lu-rich h1, .lu-rich h2, .lu-rich h3 { color: #fff; font-weight: 500; letter-spacing: -0.01em; margin: 1.75em 0 0.6em; }
.lu-rich h1 { font-size: 1.5rem; } .lu-rich h2 { font-size: 1.3rem; } .lu-rich h3 { font-size: 1.1rem; }
.lu-rich p { margin: 0 0 1em; }
.lu-rich a { color: #fff; }
.lu-rich ul, .lu-rich ol { padding-left: 1.4em; margin: 0 0 1em; }
.lu-rich img { max-width: 100%; border-radius: 0.75rem; }
.lu-rich blockquote {
  margin: 1.25em 0;
  padding: 0.25em 0 0.25em 1.1em;
  border-left: 2px solid rgba(255, 255, 255, 0.25);
  color: rgba(255, 255, 255, 0.6);
}
.lu-rich code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.82em;
  background: rgba(255, 255, 255, 0.08);
  padding: 0.15em 0.45em;
  border-radius: 0.4em;
}
.lu-rich pre {
  background: rgba(0, 0, 0, 0.45);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 0.75rem;
  padding: 1rem 1.15rem;
  overflow-x: auto;
  font-size: 0.8rem;
  line-height: 1.7;
}
.lu-rich pre code { background: none; padding: 0; }
.lu-rich hr { border: none; border-top: 1px solid rgba(255, 255, 255, 0.12); margin: 2em 0; }

.lu-actions { display: flex; flex-wrap: wrap; gap: 0.75rem; margin-top: 2rem; }
.lu-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  color: #fff;
  text-decoration: none;
  padding: 0.75rem 1.75rem;
  border-radius: 9999px;
  transition: transform 0.3s ease, background 0.3s ease;
  cursor: pointer;
  border: none;
  font-family: inherit;
}
.lu-btn--glass { background: rgba(255, 255, 255, 0.08); }
.lu-btn--glass:hover { background: rgba(255, 255, 255, 0.16); transform: translateY(-1px); }
.lu-btn--solid { background: #fff; color: #000; }
.lu-btn--solid:hover { transform: translateY(-1px); }
.lu-btn--ghost { color: rgba(255, 255, 255, 0.8); border: 1px solid rgba(255, 255, 255, 0.15); }
.lu-btn--ghost:hover { color: #fff; border-color: rgba(255, 255, 255, 0.35); }

.lu-related { margin-bottom: 4rem; }
.lu-related__title {
  font-size: 1.1rem;
  font-weight: 500;
  color: #fff;
  margin: 0 0 1.25rem;
  letter-spacing: -0.01em;
}

/* ---------- 联系页 ---------- */
.lu-contact {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  border-radius: 1.5rem;
  padding: 1.75rem;
  margin-bottom: 4rem;
}
@media (min-width: 900px) {
  .lu-contact { grid-template-columns: 0.9fr 1.1fr; gap: 2.5rem; padding: 2.5rem; }
}
.lu-contact__text { color: rgba(255, 255, 255, 0.7); font-size: 0.9rem; line-height: 1.8; margin: 0 0 1.5rem; }
.lu-email-card {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  padding: 0.9rem 1.1rem;
  border-radius: 0.9rem;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.08);
}
.lu-email-card__label { font-size: 0.6rem; letter-spacing: 0.2em; color: rgba(255, 255, 255, 0.45); }
.lu-email-card__value { flex: 1; font-size: 0.85rem; color: #fff; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.lu-copy {
  font-size: 0.7rem;
  color: #fff;
  background: rgba(255, 255, 255, 0.1);
  border: none;
  border-radius: 9999px;
  padding: 0.4rem 0.9rem;
  cursor: pointer;
  font-family: inherit;
  transition: background 0.2s ease;
}
.lu-copy:hover { background: rgba(255, 255, 255, 0.22); }
.lu-backline { margin-top: 1.25rem; font-size: 0.8rem; }
.lu-backline a { color: rgba(255, 255, 255, 0.55); text-decoration: none; }
.lu-backline a:hover { color: #fff; }

.lu-form { display: flex; flex-direction: column; gap: 1.1rem; }
.lu-form__row { display: grid; grid-template-columns: 1fr; gap: 1.1rem; }
@media (min-width: 640px) { .lu-form__row { grid-template-columns: 1fr 1fr; } }
.lu-field { display: flex; flex-direction: column; gap: 0.45rem; }
.lu-field label { font-size: 0.65rem; text-transform: uppercase; letter-spacing: 0.15em; color: rgba(255, 255, 255, 0.5); }
.lu-input, .lu-textarea {
  width: 100%;
  box-sizing: border-box;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 0.75rem;
  padding: 0.7rem 0.9rem;
  color: #fff;
  font: inherit;
  font-size: 0.85rem;
  transition: border-color 0.2s ease, background 0.2s ease;
}
.lu-input::placeholder, .lu-textarea::placeholder { color: rgba(255, 255, 255, 0.35); }
.lu-input:focus, .lu-textarea:focus {
  outline: none;
  border-color: rgba(255, 255, 255, 0.35);
  background: rgba(255, 255, 255, 0.09);
}
.lu-textarea { resize: vertical; min-height: 7rem; }
.lu-form__msg { padding: 0.75rem 1rem; border-radius: 0.75rem; font-size: 0.8rem; }
.lu-form__msg--ok { background: rgba(94, 234, 160, 0.1); border: 1px solid rgba(94, 234, 160, 0.25); color: #7ee2a8; }
.lu-form__msg--err { background: rgba(255, 107, 107, 0.1); border: 1px solid rgba(255, 107, 107, 0.25); color: #ff9b9b; }
.lu-submit { width: 100%; justify-content: center; }

/* ---------- 404 ---------- */
.lu-404 {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 7.5rem 1.5rem 0;
  box-sizing: border-box;
}
.lu-404__code {
  font-size: clamp(7rem, 26vw, 15rem);
  font-weight: 500;
  line-height: 0.9;
  color: #fff;
  letter-spacing: -0.04em;
  margin: 0;
  text-shadow: 0 0 90px rgba(255, 255, 255, 0.18);
}
.lu-404__title { font-size: clamp(1.3rem, 3.5vw, 2rem); font-weight: 500; color: #fff; margin: 1.75rem 0 0; letter-spacing: -0.01em; }
.lu-404__sub { color: rgba(255, 255, 255, 0.6); font-size: 0.9rem; margin: 0.9rem 0 0; max-width: 26rem; line-height: 1.75; }
.lu-404__actions { display: flex; flex-wrap: wrap; justify-content: center; gap: 0.9rem; margin-top: 2.25rem; }

/* ---------- 子页动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  .lu-card { animation: none; opacity: 1; transform: none; }
  .lu-card:hover { transform: none; }
  .lu-card__cover img { transition: none; }
}