/* ============================================================
   千果中国区官网 · /assets/site.css
   共享外壳：reset / 变量 / 中文排版 / 页头 / 页脚 / 托盘 / 基础组件
   ============================================================ */

/* ---------- 1. reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body, h1, h2, h3, h4, p, ul, ol, li, figure, figcaption, blockquote, dl, dd { margin: 0; padding: 0; }
ul, ol { list-style: none; }
img, svg, video { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; padding: 0; cursor: pointer; }
table { border-collapse: collapse; width: 100%; }
:focus-visible { outline: 2px solid var(--fruit); outline-offset: 3px; }

/* ---------- 2. 变量 ---------- */
:root {
  --fruit: #E4401C;
  --fruit-hi: #FF7A4D;
  --fruit-deep: #B32C0F;
  --leaf: #17806A;
  --leaf-hi: #4FB79A;
  --green-deep: #0D2B23;
  --paper: #FAF4E8;
  --card: #FFFDF8;
  --ink: #1E2622;
  --rule: #C9C3B4;
  --maxw: 1180px;
  --gutter: clamp(16px, 3.2vw, 34px);
  --tray-h: 64px;
  --sans: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: "JetBrains Mono", "SFMono-Regular", ui-monospace, Menlo, Consolas, "Courier New", monospace;
}

/* ---------- 3. 中文排版基底 ---------- */
body {
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.75;
  color: var(--ink);
  background: var(--paper);
  padding-bottom: calc(var(--tray-h) + 30px);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}
p { text-wrap: pretty; }
.h-display {
  font-size: clamp(2rem, 5vw, 4.5rem);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.06;
  color: var(--green-deep);
  text-wrap: balance;
}
.h-sub {
  font-size: clamp(1.2rem, 2.1vw, 1.7rem);
  font-weight: 800;
  letter-spacing: -0.01em;
  line-height: 1.3;
  color: var(--green-deep);
}
.lead { font-size: clamp(1rem, 1.35vw, 1.15rem); line-height: 1.85; color: var(--ink); max-width: 36em; }
.prose { max-width: 36em; font-size: 16px; line-height: 1.8; }
.prose p + p { margin-top: 0.9em; }
.prose ul { list-style: square; padding-left: 1.2em; }
.prose li + li { margin-top: 0.35em; }
.prose strong { color: var(--green-deep); font-weight: 800; }
.mono { font-family: var(--mono); letter-spacing: 0.05em; font-feature-settings: "tnum" 1; }
.eyebrow {
  display: inline-block;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--leaf);
}
.tag {
  display: inline-block;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--leaf);
  border: 1px solid var(--leaf);
  padding: 0.12rem 0.5rem;
  line-height: 1.7;
}

/* ---------- 4. 容器与区块 ---------- */
.wrap { width: 100%; max-width: var(--maxw); margin: 0 auto; padding-inline: var(--gutter); }
.section { padding-block: clamp(34px, 5vw, 72px); }
.section__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.6rem 1.4rem;
  border-bottom: 1px solid var(--rule);
  padding-bottom: 0.7rem;
  margin-bottom: clamp(18px, 2.4vw, 30px);
}
.section__title { font-size: clamp(1.35rem, 2.4vw, 2rem); font-weight: 900; letter-spacing: -0.015em; color: var(--green-deep); }

/* ---------- 5. 跳过导航 ---------- */
.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 300;
  background: var(--green-deep);
  color: var(--paper);
  padding: 0.65rem 1.1rem;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.08em;
  border-left: 4px solid var(--fruit);
  transform: translateY(-180%);
  transition: transform 0.18s ease;
}
.skip-link:focus, .skip-link:focus-visible { transform: translateY(0); outline-offset: 2px; }

/* ---------- 6. 页头 ---------- */
.site-head {
  position: sticky;
  top: 0;
  z-index: 120;
  background: var(--paper);
  border-bottom: 1px solid var(--rule);
}
.site-head__inner {
  position: relative;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 var(--gutter);
  min-height: 74px;
  display: flex;
  align-items: center;
  gap: clamp(10px, 1.8vw, 24px);
}
.brandmark { display: inline-flex; align-items: baseline; gap: 0.55rem; flex: 0 0 auto; padding-block: 0.4rem; }
.brandmark__word { position: relative; padding-left: 0.72rem; font-size: 1.5rem; font-weight: 900; letter-spacing: -0.02em; line-height: 1; color: var(--green-deep); }
.brandmark__word::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.16em;
  width: 8px;
  height: 8px;
  background: var(--fruit);
}
.brandmark__sub { font-size: 11px; letter-spacing: 0.28em; color: var(--leaf); border-left: 1px solid var(--rule); padding-left: 0.55rem; line-height: 1.4; }
.head-rule { width: 1px; height: 26px; background: var(--rule); flex: 0 0 auto; }
.head-line { font-size: 12.5px; letter-spacing: 0.18em; color: var(--leaf); white-space: nowrap; }
.site-nav { margin-left: auto; }
.nav-list { display: flex; align-items: center; flex-wrap: wrap; }
.nav-item { display: flex; align-items: center; }
.nav-item + .nav-item::before {
  content: "/";
  font-family: var(--mono);
  font-size: 11px;
  line-height: 1;
  color: var(--rule);
  padding: 0 0.55rem;
}
.nav-link {
  display: inline-block;
  padding: 0.5rem 0.05rem;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--green-deep);
  border-bottom: 2px solid transparent;
  transition: color 0.16s ease, border-color 0.16s ease;
}
.nav-link:hover { color: var(--fruit-deep); }
.nav-link[aria-current="page"] { border-bottom-color: var(--leaf); color: var(--green-deep); }
.head-cta { flex: 0 0 auto; }
.nav-toggle {
  display: none;
  align-items: center;
  gap: 0.55rem;
  border: 1px solid var(--rule);
  background: var(--card);
  color: var(--green-deep);
  padding: 0.5rem 0.7rem;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.16em;
}
.nav-toggle__icon { position: relative; display: block; width: 16px; height: 10px; }
.nav-toggle__icon::before,
.nav-toggle__icon::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  height: 2px;
  background: currentColor;
  transition: transform 0.18s ease;
}
.nav-toggle__icon::before { top: 0; }
.nav-toggle__icon::after { bottom: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle__icon::before { transform: translateY(4px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__icon::after { transform: translateY(-4px) rotate(-45deg); }
.head-scale {
  height: 5px;
  background-image: repeating-linear-gradient(to right, var(--rule) 0 1px, transparent 1px 12px);
  opacity: 0.65;
}
.head-progress { position: absolute; left: 0; right: 0; bottom: 0; height: 2px; pointer-events: none; }
.head-progress__bar { display: block; height: 100%; width: 0; background: var(--fruit); transform-origin: left center; }

/* ---------- 7. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  font-family: var(--sans);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.04em;
  line-height: 1.2;
  padding: 0.62rem 1.15rem;
  border: 1px solid transparent;
  border-radius: 0;
  cursor: pointer;
  transition: background-color 0.16s ease, color 0.16s ease, border-color 0.16s ease, transform 0.16s ease;
}
.btn--key { background: var(--fruit); border-color: var(--fruit); color: #fff; }
.btn--key:hover { background: var(--fruit-deep); border-color: var(--fruit-deep); transform: translateY(-2px); }
.btn--leaf { background: transparent; border-color: var(--leaf); color: var(--green-deep); }
.btn--leaf:hover { background: var(--leaf); color: #fff; }
.btn--ghost { background: transparent; border-color: var(--rule); color: var(--green-deep); }
.btn--ghost:hover { border-color: var(--green-deep); color: var(--fruit-deep); }

/* ---------- 8. 章节带 ---------- */
.band {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  border-top: 1px solid var(--rule);
  padding-top: 0.7rem;
  margin-bottom: clamp(16px, 2.2vw, 26px);
}
.band::before {
  content: "";
  display: block;
  width: clamp(26px, 7vw, 84px);
  height: 12px;
  background: var(--fruit);
  transform: scaleX(0.18);
  transform-origin: left center;
  transition: transform 0.24s ease;
  flex: 0 0 auto;
}
.band[data-in]::before { transform: scaleX(1); }
.band--leaf::before { background: var(--leaf); }
.band__num { font-family: var(--mono); font-size: 12px; letter-spacing: 0.05em; color: var(--fruit-deep); }
.band__label { font-size: 14px; font-weight: 800; letter-spacing: 0.08em; color: var(--green-deep); }
.band__note { margin-left: auto; font-family: var(--mono); font-size: 11px; letter-spacing: 0.24em; color: var(--leaf); }

/* ---------- 9. 卡片与网格 ---------- */
.grid { display: grid; gap: clamp(12px, 1.6vw, 20px); }
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.card {
  position: relative;
  background: var(--card);
  border: 1px solid var(--rule);
  padding: clamp(16px, 2.2vw, 26px);
}
.card--leaf { border-left: 3px solid var(--leaf); }
.card__label { display: block; font-family: var(--mono); font-size: 11px; letter-spacing: 0.18em; color: var(--leaf); margin-bottom: 0.6rem; }
.card__title { font-size: 1.12rem; font-weight: 800; line-height: 1.35; color: var(--green-deep); margin-bottom: 0.45rem; }
.card__text { font-size: 15px; line-height: 1.75; }
.card__meta { margin-top: 0.9rem; font-family: var(--mono); font-size: 11px; letter-spacing: 0.12em; color: var(--fruit-deep); }

/* ---------- 10. 图片容器基础规则 ---------- */
.media {
  position: relative;
  display: block;
  width: 100%;
  aspect-ratio: 4 / 3;
  background: var(--card);
  border: 1px solid var(--rule);
  overflow: hidden;
}
.media::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    repeating-linear-gradient(to right, rgba(201, 195, 180, 0.55) 0 1px, transparent 1px 28px),
    repeating-linear-gradient(to bottom, rgba(201, 195, 180, 0.55) 0 1px, transparent 1px 28px);
}
.media__img { position: relative; z-index: 1; width: 100%; height: 100%; object-fit: cover; }
.media__cap {
  position: absolute;
  z-index: 2;
  left: 0;
  bottom: 0;
  background: var(--paper);
  border-top: 1px solid var(--rule);
  border-right: 1px solid var(--rule);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  padding: 0.3rem 0.6rem;
  color: var(--green-deep);
}
.media--wide { aspect-ratio: 16 / 9; }
.media--tall { aspect-ratio: 3 / 4; }
.media--split { clip-path: polygon(0 0, 100% 0, 100% 100%, 0 78%); }

/* ---------- 11. 面包屑 ---------- */
.crumbs { border-top: 1px solid var(--rule); border-bottom: 1px solid var(--rule); }
.crumbs__list {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0.5rem var(--gutter);
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--leaf);
}
.crumbs__item { display: flex; align-items: center; gap: 0.5rem; }
.crumbs__item + .crumbs__item::before { content: "/"; color: var(--rule); }
.crumbs__link { color: var(--green-deep); }
.crumbs__link:hover { color: var(--fruit-deep); text-decoration: underline; }

/* ---------- 12. 分段切换（标签页） ---------- */
.seg { display: flex; flex-wrap: wrap; gap: 0; border: 1px solid var(--rule); background: var(--card); }
.seg__tab {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  padding: 0.55rem 0.9rem;
  color: var(--green-deep);
  border-right: 1px solid var(--rule);
  transition: background-color 0.18s ease, color 0.18s ease, box-shadow 0.18s ease;
}
.seg__tab:last-child { border-right: 0; }
.seg__tab:hover { background: var(--paper); }
.seg__tab[aria-selected="true"] { color: var(--leaf); box-shadow: inset 0 -3px 0 0 var(--leaf); background: var(--paper); }
.seg__panel { padding-top: clamp(14px, 2vw, 22px); }

/* ---------- 13. 页脚 ---------- */
.site-foot { background: var(--green-deep); color: var(--paper); }
.foot-grid {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: clamp(30px, 4.4vw, 54px) var(--gutter);
  display: grid;
  grid-template-columns: minmax(230px, 1.7fr) repeat(4, minmax(96px, 0.85fr));
  gap: clamp(18px, 2.4vw, 32px);
}
.foot-brandlink { display: inline-block; }
.foot-word {
  position: relative;
  display: inline-block;
  padding-left: 0.72rem;
  font-size: 1.9rem;
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1;
  color: var(--paper);
}
.foot-word::before { content: ""; position: absolute; left: 0; top: 0.18em; width: 8px; height: 8px; background: var(--fruit); }
.foot-tag { margin-top: 0.6rem; font-size: 12px; letter-spacing: 0.22em; color: rgba(250, 244, 232, 0.66); }
.foot-contact { margin-top: 1.15rem; font-size: 13px; line-height: 1.9; color: rgba(250, 244, 232, 0.8); }
.foot-contact .mono { color: var(--paper); }
.foot-note {
  margin-top: 0.9rem;
  padding-left: 0.8rem;
  border-left: 1px solid rgba(250, 244, 232, 0.28);
  font-size: 12px;
  line-height: 1.75;
  color: rgba(250, 244, 232, 0.6);
  max-width: 30em;
}
.foot-col { border-left: 1px solid rgba(250, 244, 232, 0.16); padding-left: clamp(10px, 1.4vw, 18px); }
.foot-col__title {
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.26em;
  color: var(--leaf-hi);
  margin-bottom: 0.9rem;
}
.foot-list li + li { margin-top: 0.15rem; }
.foot-link {
  display: inline-block;
  padding: 0.18rem 0;
  font-size: 14px;
  color: rgba(250, 244, 232, 0.86);
  border-bottom: 1px solid transparent;
  transition: color 0.16s ease, border-color 0.16s ease;
}
.foot-link:hover { color: var(--leaf-hi); border-bottom-color: var(--leaf-hi); }
.foot-legal { border-top: 1px solid rgba(250, 244, 232, 0.18); }
.foot-legal__inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0.9rem var(--gutter);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.6rem 1.4rem;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: rgba(250, 244, 232, 0.72);
}
.foot-copy, .foot-icp { margin: 0; }
.foot-icp { color: rgba(250, 244, 232, 0.6); }
.foot-legal__links { margin-left: auto; display: flex; flex-wrap: wrap; gap: 1rem; }
.foot-legal__links .foot-link { font-size: 12px; color: rgba(250, 244, 232, 0.8); }

/* ---------- 14. 反馈托盘 ---------- */
.tray {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 140;
  background: var(--green-deep);
  color: var(--paper);
  border-top: 2px solid var(--fruit);
  box-shadow: 0 -1px 0 rgba(250, 244, 232, 0.14);
}
.tray__inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0.5rem var(--gutter);
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.55rem clamp(0.6rem, 2vw, 1.2rem);
  min-height: var(--tray-h);
}
.tray__num {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--fruit-hi);
  border: 1px solid rgba(255, 122, 77, 0.55);
  padding: 0.08rem 0.4rem;
  line-height: 1.6;
}
.tray__body { font-size: 14px; letter-spacing: 0.02em; color: rgba(250, 244, 232, 0.9); }
.tray__cta { margin-left: auto; padding: 0.45rem 0.95rem; font-size: 14px; }
.tray__close {
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--paper);
  border: 1px solid rgba(250, 244, 232, 0.38);
  padding: 0.35rem 0.6rem;
  transition: background-color 0.16s ease;
}
.tray__close:hover { background: rgba(250, 244, 232, 0.14); }
.tray[data-collapsed] .tray__inner { min-height: 46px; }
.tray[data-collapsed] .tray__body { display: none; }

/* ---------- 15. 响应式 ---------- */
@media (max-width: 1020px) {
  .foot-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .foot-col { border-left: 0; padding-left: 0; border-top: 1px solid rgba(250, 244, 232, 0.16); padding-top: 1rem; }
}
@media (max-width: 900px) {
  .site-head__inner { min-height: 64px; gap: 0.6rem; }
  .head-rule, .head-line { display: none; }
  .head-cta { margin-left: auto; padding: 0.5rem 0.85rem; font-size: 14px; }
  .nav-toggle { display: inline-flex; }
  .site-nav {
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    margin: 0;
    display: none;
    max-height: min(70vh, 520px);
    overflow: auto;
    background: var(--card);
    border-top: 1px solid var(--rule);
    border-bottom: 1px solid var(--rule);
    padding: 0.3rem var(--gutter) 1rem;
  }
  .site-nav[data-open] { display: block; }
  .nav-list { flex-direction: column; align-items: stretch; }
  .nav-item + .nav-item::before { content: none; }
  .nav-item { border-top: 1px solid var(--rule); }
  .nav-item:first-child { border-top: 0; }
  .nav-link { display: block; padding: 0.8rem 0.05rem; font-size: 16px; border-bottom: 2px solid transparent; }
  .nav-link[aria-current="page"] { border-bottom-color: transparent; border-left: 3px solid var(--leaf); padding-left: 0.6rem; }
}
@media (max-width: 860px) {
  .grid--3, .grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 640px) {
  body { padding-bottom: calc(var(--tray-h) + 86px); }
  .tray__body { flex: 1 1 100%; font-size: 13px; }
  .tray__cta { margin-left: 0; }
  .foot-legal__links { margin-left: 0; }
  .section__head { flex-direction: column; align-items: flex-start; }
}
@media (max-width: 560px) {
  .foot-grid { grid-template-columns: 1fr; }
  .grid--2, .grid--3, .grid--4 { grid-template-columns: 1fr; }
  .band__note { display: none; }
  .brandmark__sub { display: none; }
}

/* ---------- 16. 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
  .band::before { transform: none; }
  .btn--key:hover { transform: none; }
  .skip-link { transition: none; }
}