/* ============================================================
   富联娱乐 · 鞋盒货架视觉系统（Shoebox Shelf System）
   core.css — 令牌 / 重置 / 版式骨架 / 页头页脚 / 基础元件
   设计语言：纸箱纸面 + 硬边描线 + 安全橙 + 尺码标签 + 条码
   ============================================================ */

:root {
  --ink: #131110;
  --ink-soft: #2b2622;
  --paper: #f7f3e9;
  --paper-2: #efe8d8;
  --carton: #e2d7c1;
  --carton-2: #d6c9b0;
  --orange: #ef5a22;
  --orange-deep: #c9410f;
  --sticker: #ffe14d;
  --muted: #6c6457;
  --line: rgba(19, 17, 16, 0.16);
  --line-strong: rgba(19, 17, 16, 0.52);
  --hard: 6px 6px 0 var(--ink);
  --hard-sm: 4px 4px 0 var(--ink);
  --mono: ui-monospace, "SFMono-Regular", Consolas, "Liberation Mono", "Courier New", monospace;
  --sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", system-ui, -apple-system, sans-serif;
  --wrap: 1220px;
  --head-h: 74px;
}

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

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

body {
  margin: 0;
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.75;
  color: var(--ink);
  background-color: var(--paper);
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 100% 28px, 28px 100%;
  background-blend-mode: normal;
  overflow-x: hidden;
}

/* 网格线压到极淡，避免与正文抢注意力 */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background: var(--paper);
  opacity: 0.62;
  z-index: -1;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; }
h1, h2, h3, h4 { margin: 0; line-height: 1.1; letter-spacing: -0.02em; }
p { margin: 0 0 1em; }
ul, ol { margin: 0; padding: 0; }
li { list-style: none; }
strong { font-weight: 800; }
::selection { background: var(--sticker); color: var(--ink); }

:focus-visible {
  outline: 3px solid var(--orange);
  outline-offset: 3px;
}

.wrap {
  width: min(100% - 48px, var(--wrap));
  margin-inline: auto;
}

.wrap--narrow { width: min(100% - 48px, 880px); margin-inline: auto; }

.fl-skip {
  position: absolute;
  left: 16px;
  top: -80px;
  z-index: 200;
  padding: 10px 16px;
  background: var(--ink);
  color: var(--paper);
  font-size: 13px;
}
.fl-skip:focus { top: 12px; }

/* ---------- 顶部物流条 ---------- */
.fl-ticker {
  background: var(--ink);
  color: var(--paper);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  overflow: hidden;
  border-bottom: 2px solid var(--ink);
}
.fl-ticker__track {
  display: flex;
  gap: 28px;
  width: max-content;
  padding: 7px 0;
  white-space: nowrap;
  animation: ticker 42s linear infinite;
}
.fl-ticker__track span { opacity: 0.92; }
.fl-ticker__track i { color: var(--orange); font-style: normal; }
@keyframes ticker {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

/* ---------- 页头 ---------- */
.fl-head {
  position: sticky;
  top: 0;
  z-index: 90;
  background: var(--paper);
  border-bottom: 2px solid var(--ink);
}
.fl-head__row {
  display: flex;
  align-items: center;
  gap: 26px;
  min-height: var(--head-h);
}
.fl-brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex: 0 0 auto;
}
.fl-brand__mark {
  position: relative;
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--mono);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.04em;
}
.fl-brand__mark::after {
  content: "";
  position: absolute;
  right: -6px;
  top: -6px;
  width: 14px;
  height: 14px;
  background: var(--orange);
  border: 2px solid var(--ink);
}
.fl-brand__text { display: flex; flex-direction: column; line-height: 1.05; }
.fl-brand__text b { font-size: 19px; font-weight: 900; letter-spacing: 0.02em; }
.fl-brand__text i {
  margin-top: 4px;
  font-family: var(--mono);
  font-style: normal;
  font-size: 9px;
  letter-spacing: 0.2em;
  color: var(--muted);
}

.fl-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: auto;
  flex-wrap: nowrap;
}
.fl-nav a {
  position: relative;
  padding: 8px 10px;
  font-size: 14px;
  font-weight: 600;
  white-space: nowrap;
  color: var(--ink-soft);
}
.fl-nav a::after {
  content: "";
  position: absolute;
  left: 10px;
  right: 10px;
  bottom: 2px;
  height: 3px;
  background: var(--orange);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.24s ease;
}
.fl-nav a:hover::after,
.fl-nav a[aria-current="page"]::after { transform: scaleX(1); }
.fl-nav a[aria-current="page"] { color: var(--ink); }

.fl-head__act {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
}
.fl-head__act .fl-btn { padding: 10px 14px; font-size: 13px; box-shadow: 3px 3px 0 var(--ink); }
.fl-head__act .fl-btn:hover { box-shadow: 5px 5px 0 var(--ink); }

.fl-burger {
  display: none;
  width: 42px;
  height: 42px;
  border: 2px solid var(--ink);
  background: var(--paper);
  cursor: pointer;
  padding: 0;
  place-items: center;
  gap: 5px;
}
.fl-burger span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--ink);
  transition: transform 0.2s ease;
}
.fl-burger span + span { margin-top: 5px; }

/* ---------- 按钮 ---------- */
.fl-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 22px;
  border: 2px solid var(--ink);
  background: var(--paper);
  color: var(--ink);
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 0.02em;
  box-shadow: var(--hard-sm);
  cursor: pointer;
  transition: transform 0.16s ease, box-shadow 0.16s ease, background 0.16s ease;
}
.fl-btn:hover {
  transform: translate(-2px, -2px);
  box-shadow: 7px 7px 0 var(--ink);
}
.fl-btn:active { transform: translate(2px, 2px); box-shadow: 2px 2px 0 var(--ink); }
.fl-btn--orange { background: var(--orange); }
.fl-btn--orange:hover { background: #f26a35; }
.fl-btn--ink { background: var(--ink); color: var(--paper); }
.fl-btn--ink:hover { background: #241f1b; }
.fl-btn--line { background: transparent; }
.fl-btn--sm { padding: 10px 16px; font-size: 13px; box-shadow: 3px 3px 0 var(--ink); }
.fl-btn--wide { width: 100%; }

/* ---------- 文字与标签 ---------- */
.fl-kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--orange-deep);
}
.fl-kicker::before {
  content: "";
  width: 22px;
  height: 2px;
  background: var(--orange);
}
.fl-title-xl {
  font-size: clamp(2.5rem, 6.2vw, 4.6rem);
  font-weight: 900;
  line-height: 0.98;
  letter-spacing: -0.035em;
}
.fl-title {
  font-size: clamp(1.9rem, 3.6vw, 2.85rem);
  font-weight: 900;
  line-height: 1.02;
}
.fl-title-sm {
  font-size: clamp(1.3rem, 2.2vw, 1.65rem);
  font-weight: 800;
  line-height: 1.2;
}
.fl-lede {
  max-width: 46em;
  font-size: 1.02rem;
  color: var(--ink-soft);
}
.fl-note { font-size: 13px; color: var(--muted); }
.fl-mono { font-family: var(--mono); }

.fl-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 9px;
  border: 1.5px solid var(--ink);
  background: var(--paper);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  white-space: nowrap;
}
.fl-tag--fill { background: var(--ink); color: var(--paper); border-color: var(--ink); }
.fl-tag--sticker { background: var(--sticker); }
.fl-tag--orange { background: var(--orange); }

.fl-chips { display: flex; flex-wrap: wrap; gap: 8px; }
.fl-chip {
  display: inline-grid;
  place-items: center;
  min-width: 40px;
  height: 32px;
  padding: 0 8px;
  border: 1.5px dashed var(--line-strong);
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink-soft);
}

.fl-barcode {
  height: 30px;
  width: 148px;
  background-image: repeating-linear-gradient(
    90deg,
    var(--ink) 0 2px, transparent 2px 5px,
    var(--ink) 5px 6px, transparent 6px 9px,
    var(--ink) 9px 12px, transparent 12px 15px,
    var(--ink) 15px 16px, transparent 16px 20px
  );
}
.fl-barcode--light {
  background-image: repeating-linear-gradient(
    90deg,
    var(--paper) 0 2px, transparent 2px 5px,
    var(--paper) 5px 6px, transparent 6px 9px,
    var(--paper) 9px 12px, transparent 12px 15px,
    var(--paper) 15px 16px, transparent 16px 20px
  );
}

.fl-hr {
  height: 0;
  border: 0;
  border-top: 2px solid var(--ink);
  margin: 0;
}
.fl-hr--soft { border-top: 1.5px solid var(--line-strong); }

/* ---------- 货架区块 ---------- */
.fl-shelf {
  position: relative;
  padding: 66px 0;
  border-top: 2px solid var(--ink);
}
.fl-shelf--tight { padding: 44px 0; }
.fl-shelf--carton { background: var(--carton); }
.fl-shelf--paper2 { background: var(--paper-2); }
.fl-shelf--ink {
  background: var(--ink);
  color: var(--paper);
  border-top-color: var(--ink);
}
.fl-shelf--ink .fl-lede,
.fl-shelf--ink p { color: rgba(247, 243, 233, 0.78); }
.fl-shelf--ink .fl-kicker { color: var(--sticker); }
.fl-shelf--ink .fl-kicker::before { background: var(--sticker); }

.fl-shelf__label {
  position: absolute;
  left: 14px;
  top: 66px;
  display: flex;
  align-items: center;
  gap: 10px;
  writing-mode: vertical-rl;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--muted);
}
.fl-shelf__label::before {
  content: "";
  width: 2px;
  height: 34px;
  background: var(--orange);
}

.fl-sechead {
  display: grid;
  grid-template-columns: 96px minmax(0, 1fr);
  gap: 26px;
  align-items: start;
  margin-bottom: 34px;
}
.fl-sechead__no {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--orange-deep);
  padding-top: 8px;
  border-top: 3px solid var(--orange);
}
.fl-sechead__body > p { margin-top: 14px; }
.fl-sechead--row {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 20px;
}

/* ---------- 网格 ---------- */
.fl-grid { display: grid; gap: 22px; }
.fl-grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.fl-grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.fl-grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.fl-grid--sidebar { grid-template-columns: minmax(0, 1fr) 300px; gap: 40px; }

/* ---------- 纸箱卡片 ---------- */
.fl-card {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: 24px;
  background: var(--paper);
  border: 2px solid var(--ink);
  box-shadow: var(--hard);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.fl-card:hover { transform: translate(-3px, -3px); box-shadow: 9px 9px 0 var(--ink); }
.fl-card--flat { box-shadow: none; }
.fl-card--flat:hover { transform: none; box-shadow: none; }
.fl-card__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--muted);
}
.fl-card h3 { margin-bottom: 10px; }
.fl-card p { font-size: 14.5px; color: var(--ink-soft); }
.fl-card__foot {
  margin-top: auto;
  padding-top: 16px;
  border-top: 1.5px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  font-size: 13px;
  font-weight: 700;
}
.fl-card__link { display: inline-flex; align-items: center; gap: 6px; }
.fl-card__link::after { content: "→"; transition: transform 0.2s ease; }
.fl-card:hover .fl-card__link::after { transform: translateX(4px); }

/* ---------- 页脚 ---------- */
.fl-foot {
  background: var(--ink);
  color: var(--paper);
  border-top: 2px solid var(--ink);
  padding: 54px 0 26px;
}
.fl-foot__top {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 36px;
  padding-bottom: 34px;
  border-bottom: 1px solid rgba(247, 243, 233, 0.22);
}
.fl-foot__brand .fl-brand__mark { background: var(--paper); color: var(--ink); border: 2px solid var(--paper); }
.fl-foot__brand .fl-brand__mark::after { border-color: var(--ink); }
.fl-foot__brand .fl-brand__text b { color: var(--paper); }
.fl-foot__brand .fl-brand__text i { color: rgba(247, 243, 233, 0.55); }
.fl-foot__slogan {
  margin-top: 18px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: rgba(247, 243, 233, 0.6);
}
.fl-foot__col h3 {
  margin-bottom: 16px;
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--sticker);
}
.fl-foot__col li { margin-bottom: 9px; }
.fl-foot__col a { font-size: 13.5px; color: rgba(247, 243, 233, 0.82); }
.fl-foot__col a:hover { color: var(--paper); text-decoration: underline; text-underline-offset: 4px; }
.fl-foot__col address { font-style: normal; font-size: 13.5px; color: rgba(247, 243, 233, 0.82); }
.fl-foot__legal { padding-top: 22px; }
.fl-foot__legal p {
  margin: 0 0 8px;
  font-size: 12px;
  line-height: 1.7;
  color: rgba(247, 243, 233, 0.55);
}
.fl-foot__legal strong { color: rgba(247, 243, 233, 0.8); }
.fl-foot__bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: 18px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: rgba(247, 243, 233, 0.45);
}
.fl-foot__bottom nav { display: flex; gap: 16px; }
.fl-foot__bottom a:hover { color: var(--paper); }

/* ---------- 动效 ---------- */
.js .fl-reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.55s ease, transform 0.55s cubic-bezier(0.2, 0.7, 0.2, 1);
}
.js .fl-reveal.is-in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .fl-ticker__track { animation: none; }
  .js .fl-reveal { opacity: 1; transform: none; transition: none; }
  *, *::before, *::after { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}

/* ---------- 响应式 ---------- */
@media (max-width: 1120px) {
  .fl-shelf__label { display: none; }
  .fl-nav { gap: 0; }
  .fl-nav a { padding: 8px 8px; font-size: 13px; }
}

@media (max-width: 980px) {
  :root { --head-h: 66px; }
  .fl-burger { display: grid; }
  .fl-head__act .fl-btn--line { display: none; }
  .fl-nav {
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 8px 24px 22px;
    background: var(--paper);
    border-bottom: 2px solid var(--ink);
    box-shadow: 0 18px 30px rgba(19, 17, 16, 0.16);
  }
  .fl-head.is-open .fl-nav { display: flex; }
  .fl-nav a {
    padding: 13px 4px;
    font-size: 15px;
    border-bottom: 1px solid var(--line);
  }
  .fl-nav a::after { display: none; }
  .fl-brand__text b { font-size: 17px; }
  .fl-grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .fl-grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .fl-grid--sidebar { grid-template-columns: minmax(0, 1fr); }
  .fl-foot__top { grid-template-columns: 1fr 1fr; gap: 28px; }
}

@media (max-width: 720px) {
  body { font-size: 15px; }
  .wrap, .wrap--narrow { width: min(100% - 32px, var(--wrap)); }
  .fl-shelf { padding: 46px 0; }
  .fl-sechead { grid-template-columns: 1fr; gap: 12px; }
  .fl-grid--2,
  .fl-grid--3,
  .fl-grid--4 { grid-template-columns: minmax(0, 1fr); }
  .fl-foot__top { grid-template-columns: minmax(0, 1fr); }
  .fl-foot { padding-top: 40px; }
  .fl-card { padding: 20px; box-shadow: 4px 4px 0 var(--ink); }
  .fl-title-xl { font-size: clamp(2.2rem, 10vw, 3rem); }
}