/* ==========================================================================
   水果派官网 — /assets/site.css
   共享外壳：框架式导航 · 果瓣索引 · 色带页脚 · 基础组件
   ========================================================================== */

/* 1. Reset ---------------------------------------------------------------- */
*,
*::before,
*::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 9rem;
}

body, h1, h2, h3, h4, h5, p, ul, ol, figure, blockquote, dl, dd, address { margin: 0; }
ul, ol { padding: 0; list-style: none; }
img, svg { display: block; max-width: 100%; }
button { font: inherit; color: inherit; background: none; border: 0; padding: 0; cursor: pointer; }
a { color: inherit; text-decoration: none; }
address { font-style: normal; }

/* 2. 变量 ---------------------------------------------------------------- */
:root {
  --cream: #FFF7EC;
  --ink: #241F1D;
  --orange: #F26B21;
  --orange-deep: #D9561A;
  --berry: #B3123E;
  --wine: #65152F;
  --lime: #A9C93F;
  --teal: #0B4A47;
  --indigo: #34245E;
  --sand: #F6C6A4;
  --glass: rgba(255, 255, 255, 0.62);

  --ink-70: rgba(36, 31, 29, 0.70);
  --ink-55: rgba(36, 31, 29, 0.55);
  --ink-30: rgba(36, 31, 29, 0.30);
  --ink-12: rgba(36, 31, 29, 0.12);
  --cream-88: rgba(255, 247, 236, 0.88);
  --cream-80: rgba(255, 247, 236, 0.80);
  --cream-60: rgba(255, 247, 236, 0.60);
  --cream-32: rgba(255, 247, 236, 0.32);
  --cream-18: rgba(255, 247, 236, 0.18);
  --cream-10: rgba(255, 247, 236, 0.10);

  --font-display: "HarmonyOS Sans SC", "PingFang SC", "Noto Sans SC", sans-serif;
  --font-body: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", sans-serif;
  --font-mono: "IBM Plex Mono", "JetBrains Mono", "SFMono-Regular", ui-monospace, monospace;

  --shell-max: 1240px;
  --gutter: clamp(1rem, 3vw, 2.5rem);
  --radius-s: 0.5rem;
  --radius-m: 0.9rem;
  --radius-l: 1.35rem;
  --ease: cubic-bezier(0.4, 0.1, 0.2, 1);
}

/* 3. 中文排版基底 -------------------------------------------------------- */
body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.75;
  color: var(--ink);
  background: var(--cream);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.25;
  letter-spacing: -0.02em;
}

:focus-visible {
  outline: 3px solid var(--orange);
  outline-offset: 3px;
  border-radius: 0.25rem;
}

.site-header :focus-visible,
.site-footer :focus-visible {
  outline-color: var(--lime);
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
}

/* 4. 跳转链接 ------------------------------------------------------------ */
.skip-link {
  position: fixed;
  top: 0.6rem;
  left: -999px;
  z-index: 200;
  padding: 0.62rem 1.05rem;
  border-radius: var(--radius-s);
  background: var(--ink);
  color: var(--cream);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  transition: left 0.2s var(--ease);
}

.skip-link:focus {
  left: 0.75rem;
}

/* 5. 头部框架 ------------------------------------------------------------ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  background: var(--teal);
  color: var(--cream);
  border-bottom: 1px solid var(--cream-18);
  transition: background-color 0.25s var(--ease), box-shadow 0.25s var(--ease);
}

.site-header.is-scrolled {
  background: #093E3B;
  box-shadow: 0 14px 34px -24px rgba(11, 74, 71, 0.95);
}

.header-frame {
  max-width: var(--shell-max);
  margin-inline: auto;
  padding-inline: var(--gutter);
  border-inline: 1px solid var(--cream-10);
}

.header-main {
  display: flex;
  align-items: center;
  gap: clamp(0.75rem, 2vw, 2rem);
  min-height: 4.4rem;
  padding-block: 0.55rem;
}

/* 5.1 品牌 */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  flex: 0 0 auto;
}

.brand-mark {
  position: relative;
  display: grid;
  place-items: center;
  width: 2.25rem;
  height: 2.25rem;
  border-radius: 0.62rem;
  background: conic-gradient(
    from 210deg,
    var(--orange) 0 120deg,
    var(--berry) 120deg 240deg,
    var(--lime) 240deg 360deg
  );
  box-shadow: inset 0 0 0 3px rgba(11, 74, 71, 0.88);
  flex: 0 0 auto;
}

.brand-mark::after {
  content: "";
  width: 0.44rem;
  height: 0.44rem;
  border-radius: 50%;
  background: var(--cream);
}

.brand-text { display: grid; gap: 0.05rem; }

.brand-name {
  font-family: var(--font-display);
  font-size: 1.08rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  line-height: 1.2;
}

.brand-domain {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.03em;
  color: var(--cream-60);
  line-height: 1.3;
}

/* 5.2 桌面导航 */
.site-nav {
  flex: 1 1 auto;
  display: flex;
  justify-content: center;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 0.12rem;
  flex-wrap: wrap;
}

.nav-item { display: block; }

.nav-link {
  display: inline-flex;
  align-items: center;
  gap: 0.42rem;
  padding: 0.42rem 0.68rem;
  border-radius: 999px;
  font-size: 0.88rem;
  line-height: 1.4;
  color: var(--cream-80);
  transition: color 0.2s var(--ease), background-color 0.2s var(--ease);
}

.nav-link::before {
  content: "";
  width: 0.46rem;
  height: 0.46rem;
  border-radius: 2px;
  background: var(--lime);
  flex: 0 0 auto;
  transition: transform 0.2s var(--ease);
}

.nav-item:nth-child(1) .nav-link::before { background: var(--orange); }
.nav-item:nth-child(2) .nav-link::before { background: var(--sand); }
.nav-item:nth-child(3) .nav-link::before { background: var(--lime); }
.nav-item:nth-child(4) .nav-link::before { background: var(--berry); }
.nav-item:nth-child(5) .nav-link::before { background: var(--sand); }
.nav-item:nth-child(6) .nav-link::before { background: var(--orange); }

.nav-link:hover,
.nav-link:focus-visible {
  color: var(--cream);
  background: var(--cream-10);
}

.nav-link:hover::before { transform: scale(1.35); }

.nav-link[aria-current="page"] {
  background: var(--cream);
  color: var(--teal);
  font-weight: 600;
}

.nav-link[aria-current="page"]::before {
  background: var(--orange);
  transform: scale(1.1);
}

.nav-cta { display: none; }

/* 5.3 头部动作按钮 */
.header-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex: 0 0 auto;
}

/* 5.4 索引条 */
.header-index {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  flex-wrap: wrap;
  padding-block: 0.4rem 0.6rem;
  border-top: 1px solid var(--cream-10);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.07em;
  line-height: 1.5;
}

.index-note { color: var(--cream-88); }

.index-sep {
  width: 1px;
  height: 0.7rem;
  background: var(--cream-32);
}

.index-meta { color: var(--cream-60); }

.index-chips {
  display: inline-flex;
  align-items: center;
  gap: 0.28rem;
  margin-inline-start: auto;
}

.index-chip {
  display: block;
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 2px;
  background: var(--cream-32);
}

.index-chip:nth-child(1) { background: var(--orange); }
.index-chip:nth-child(2) { background: var(--berry); }
.index-chip:nth-child(3) { background: var(--lime); }
.index-chip:nth-child(4) { background: var(--sand); }

/* 5.5 移动导航按钮与遮罩 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 0.45rem;
  margin-inline-start: auto;
  padding: 0.46rem 0.72rem;
  border: 1px solid var(--cream-32);
  border-radius: 999px;
  color: var(--cream);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  transition: background-color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.nav-toggle:hover { background: var(--cream-10); }

.nav-toggle-icon {
  display: grid;
  gap: 4px;
  width: 1.05rem;
}

.nav-toggle-bar {
  display: block;
  width: 100%;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
  transition: transform 0.24s var(--ease), opacity 0.24s var(--ease);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) {
  transform: translateY(3px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2) {
  transform: translateY(-3px) rotate(-45deg);
}

.nav-toggle-label { white-space: nowrap; }

.nav-scrim {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 85;
  background: rgba(36, 31, 29, 0.48);
}

/* 6. 按钮 ---------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.6rem 1.12rem;
  border: 1px solid transparent;
  border-radius: 999px;
  font-family: var(--font-body);
  font-size: 0.86rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  line-height: 1.4;
  cursor: pointer;
  transition: background-color 0.2s var(--ease), color 0.2s var(--ease),
    border-color 0.2s var(--ease), transform 0.2s var(--ease);
}

.btn:active { transform: translateY(1px); }

.btn-primary {
  background: var(--orange);
  color: #fff;
}

.btn-primary:hover,
.btn-primary:focus-visible { background: var(--orange-deep); }

.btn-ghost {
  border-color: var(--cream-32);
  color: var(--cream);
}

.btn-ghost:hover,
.btn-ghost:focus-visible {
  background: var(--cream-10);
  border-color: var(--cream-60);
}

.btn-lime {
  background: var(--lime);
  color: var(--ink);
}

.btn-lime:hover,
.btn-lime:focus-visible { background: #BBD955; }

/* 7. 页脚 ---------------------------------------------------------------- */
.site-footer {
  margin-top: clamp(3rem, 8vw, 6rem);
  background:
    linear-gradient(
      to right,
      var(--orange) 0 25%,
      var(--berry) 25% 50%,
      var(--lime) 50% 75%,
      var(--indigo) 75% 100%
    ) top / 100% 5px no-repeat,
    var(--wine);
  color: var(--cream);
}

.footer-frame {
  max-width: var(--shell-max);
  margin-inline: auto;
  padding: clamp(2rem, 5vw, 3.5rem) var(--gutter) 1.5rem;
  border-inline: 1px solid rgba(255, 247, 236, 0.08);
}

.footer-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1rem 2rem;
  padding-bottom: 1.6rem;
  border-bottom: 1px solid var(--cream-18);
}

.footer-brand {
  font-family: var(--font-display);
  font-size: clamp(1.55rem, 3.4vw, 2.35rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

.footer-line {
  flex: 1 1 20rem;
  max-width: 34ch;
  font-size: 0.94rem;
  color: var(--cream-80);
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.75rem clamp(1.5rem, 4vw, 3rem);
  padding-block: clamp(1.5rem, 4vw, 2.4rem);
  border-bottom: 1px solid var(--cream-18);
}

.footer-label {
  margin-bottom: 0.7rem;
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--sand);
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.2rem 1rem;
}

.footer-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.26rem 0;
  font-size: 0.9rem;
  color: var(--cream-80);
  transition: color 0.2s var(--ease);
}

.footer-link::before {
  content: "";
  width: 0.34rem;
  height: 0.34rem;
  border-radius: 50%;
  background: var(--lime);
  flex: 0 0 auto;
}

.footer-link:hover,
.footer-link:focus-visible { color: #fff; }

.footer-address {
  display: grid;
  gap: 0.34rem;
  font-size: 0.9rem;
  color: var(--cream-88);
}

.footer-email,
.footer-phone {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  letter-spacing: 0.02em;
  color: #fff;
  word-break: break-all;
}

.footer-addr { color: var(--cream-80); }

.footer-note {
  margin-top: 0.7rem;
  font-size: 0.76rem;
  letter-spacing: 0.04em;
  color: var(--cream-60);
}

.footer-meta { display: grid; align-content: start; gap: 0.3rem; }

.footer-icp,
.footer-copy {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  color: var(--cream-80);
}

.footer-base {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem 1.5rem;
  padding-top: 1.1rem;
}

/* 8. 布局与通用组件 ------------------------------------------------------ */
.container {
  width: 100%;
  max-width: var(--shell-max);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section { padding-block: clamp(2.4rem, 6vw, 4.5rem); }

.section-head {
  display: grid;
  gap: 0.7rem;
  max-width: 70ch;
  margin-bottom: clamp(1.4rem, 3vw, 2.2rem);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--berry);
}

.eyebrow::before {
  content: "";
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 2px;
  background: var(--orange);
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.55rem, 3vw, 2.35rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.22;
}

.lede {
  max-width: 62ch;
  font-size: clamp(1rem, 1.5vw, 1.1rem);
  color: var(--ink-70);
}

.prose {
  max-width: 68ch;
  color: var(--ink-70);
}

.prose p + p { margin-top: 0.9rem; }

.grid {
  display: grid;
  gap: clamp(1rem, 2.5vw, 1.75rem);
}

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

.aside-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.5rem, 4vw, 2.5rem);
}

.aside-rail { min-width: 0; }

.rule {
  height: 6px;
  border-radius: 999px;
  background: linear-gradient(
    90deg,
    var(--orange) 0 25%,
    var(--berry) 25% 50%,
    var(--lime) 50% 75%,
    var(--indigo) 75% 100%
  );
}

.card {
  background: #fff;
  border: 1px solid var(--ink-12);
  border-radius: var(--radius-l);
  padding: clamp(1rem, 3vw, 1.6rem);
  box-shadow: 0 22px 48px -46px rgba(36, 31, 29, 0.7);
}

.panel {
  background: #fff;
  border: 1px solid var(--ink-12);
  border-radius: var(--radius-l);
  padding: clamp(1.1rem, 3vw, 1.8rem);
}

.panel--glass {
  background: var(--glass);
  border: 1px solid rgba(255, 255, 255, 0.72);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: 0 24px 50px -34px rgba(36, 31, 29, 0.55);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 0.32rem;
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  line-height: 1.55;
  background: var(--sand);
  color: var(--ink);
}

.tag--orange { background: var(--orange); color: #fff; }
.tag--berry { background: var(--berry); color: #fff; }
.tag--lime { background: var(--lime); color: var(--ink); }
.tag--teal { background: var(--teal); color: var(--cream); }
.tag--indigo { background: var(--indigo); color: var(--cream); }
.tag--cream { background: var(--cream); color: var(--ink); }

.stat { display: grid; gap: 0.1rem; }

.stat-value {
  font-family: var(--font-mono);
  font-size: clamp(1.55rem, 3vw, 2.2rem);
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.01em;
  color: var(--orange);
}

.stat-label {
  font-size: 0.76rem;
  letter-spacing: 0.05em;
  color: var(--ink-55);
}

.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-weight: 600;
  color: var(--berry);
}

.link-arrow::after {
  content: "→";
  transition: transform 0.2s var(--ease);
}

.link-arrow:hover::after { transform: translateX(3px); }

/* 9. 面包屑 -------------------------------------------------------------- */
.breadcrumb { padding-block: 1.1rem 0; }

.breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.05em;
}

.breadcrumb-item {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--ink-55);
}

.breadcrumb-item + .breadcrumb-item::before {
  content: "/";
  color: var(--orange);
}

.breadcrumb-link {
  color: var(--ink);
  border-bottom: 1px solid var(--ink-30);
}

.breadcrumb-link:hover { border-bottom-color: var(--orange); }

.breadcrumb-current {
  color: var(--berry);
  font-weight: 600;
}

/* 10. 图片容器 ----------------------------------------------------------- */
.media {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-m);
  background: var(--sand);
  aspect-ratio: 4 / 3;
}

.media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

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

.media-caption {
  margin-top: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.04em;
  color: var(--ink-55);
}

/* 11. 滚动显现 ----------------------------------------------------------- */
.js-ready [data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.52s var(--ease), transform 0.52s var(--ease);
}

.js-ready [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

/* 12. 响应式 ------------------------------------------------------------- */
@media (max-width: 1024px) {
  .grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-meta { grid-column: 1 / -1; }
}

@media (max-width: 900px) {
  html { scroll-padding-top: 6rem; }

  .header-main {
    min-height: 3.9rem;
    flex-wrap: nowrap;
  }

  .brand-domain { display: none; }

  .header-actions { display: none; }

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

  .site-nav {
    position: fixed;
    inset: auto 0 0 0;
    z-index: 90;
    display: block;
    margin: 0;
    padding: 1.2rem clamp(1rem, 4vw, 1.75rem) calc(1.4rem + env(safe-area-inset-bottom));
    max-height: 82vh;
    overflow-y: auto;
    border-radius: 1.25rem 1.25rem 0 0;
    background: var(--teal);
    box-shadow: 0 -24px 54px -26px rgba(11, 74, 71, 0.85);
    transform: translateY(105%);
    visibility: hidden;
    transition: transform 0.28s var(--ease), visibility 0.28s var(--ease);
  }

  .site-header[data-open] .site-nav {
    transform: translateY(0);
    visibility: visible;
  }

  .site-header[data-open] .nav-scrim { display: block; }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0.2rem;
  }

  .nav-link {
    justify-content: flex-start;
    padding: 0.78rem 0.7rem;
    border-radius: 0.75rem;
    font-size: 1rem;
    color: var(--cream-88);
  }

  .nav-link[aria-current="page"] {
    background: var(--cream-10);
    color: var(--cream);
    font-weight: 600;
  }

  .nav-link[aria-current="page"]::before { background: var(--orange); }

  .nav-cta {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--cream-18);
  }

  .nav-cta .btn { width: 100%; }

  .header-index { font-size: 0.64rem; }

  .footer-head { align-items: flex-start; }
  .footer-line { flex: 1 1 100%; }
}

@media (max-width: 640px) {
  .index-meta { display: none; }
  .index-chips { margin-inline-start: auto; }

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

  .footer-grid { grid-template-columns: minmax(0, 1fr); }
  .footer-links { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-meta { grid-column: auto; }
  .footer-base { flex-direction: column; align-items: flex-start; }
}

@media (min-width: 901px) {
  .aside-layout {
    grid-template-columns: minmax(180px, 220px) minmax(0, 1fr);
    align-items: start;
  }

  .aside-rail {
    position: sticky;
    top: 9.5rem;
    align-self: start;
  }
}

/* 13. 减弱动效 ----------------------------------------------------------- */
@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;
    scroll-behavior: auto !important;
  }

  .js-ready [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .site-nav { transition: none; }
}