/* ============================================================
   水果派 /assets/site.css
   共享层：reset · 变量 · 中文排版 · 刊头与页脚 · 基础组件
   ============================================================ */

/* ---------- reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { margin: 0; padding: 0; -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body, h1, h2, h3, h4, h5, p, ul, ol, li, figure, blockquote, dl, dd, fieldset { margin: 0; padding: 0; }
ul, ol { list-style: none; }
img, svg, video { display: block; max-width: 100%; }
img { height: auto; border: 0; }
button { font: inherit; color: inherit; background: none; border: 0; }
a { color: inherit; text-decoration: none; }
table { border-collapse: collapse; width: 100%; }

/* ---------- 变量 ---------- */
:root {
  --guava: #E23A4B;
  --guava-deep: #A3162B;
  --mango: #FFB400;
  --lime: #7DB700;
  --blueberry: #5B3E96;
  --tangerine: #F26522;
  --dragon: #FF4F8B;
  --ink: #12100F;
  --cream: #FBF7F1;
  --flesh: #F1E7DA;
  --grid: #D9CCBC;

  --ink-70: rgba(18, 16, 15, .72);
  --ink-55: rgba(18, 16, 15, .55);
  --cream-70: rgba(251, 247, 241, .72);
  --cream-45: rgba(251, 247, 241, .45);

  --font-head: "Source Han Sans Heavy", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-num: "SFMono-Regular", "JetBrains Mono", Consolas, "Noto Sans SC", monospace;

  --fs-220: clamp(96px, 18vw, 220px);
  --fs-96: clamp(52px, 9vw, 96px);
  --fs-48: clamp(30px, 4.4vw, 48px);
  --fs-28: clamp(22px, 2.6vw, 28px);
  --fs-17: 17px;
  --fs-13: 13px;

  --wrap: 1200px;
  --gutter: clamp(18px, 4vw, 40px);
  --ease: cubic-bezier(.22, .61, .36, 1);
  --line: 2px;
}

/* ---------- 中文排版基底 ---------- */
body {
  background: var(--cream);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: var(--fs-17);
  line-height: 1.9;
  font-weight: 400;
  letter-spacing: .01em;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  overflow-x: hidden;
}
h1, h2, h3, h4 {
  font-family: var(--font-head);
  font-weight: 900;
  letter-spacing: -.02em;
  line-height: 1.2;
}
p { text-wrap: pretty; }
strong { font-weight: 700; }
::selection { background: var(--mango); color: var(--ink); }

:focus-visible { outline: 2px solid var(--mango); outline-offset: 2px; }

/* ---------- 布局工具 ---------- */
.wrap { width: min(calc(100% - 2 * var(--gutter)), var(--wrap)); margin-inline: auto; }
.section { padding: clamp(48px, 8vw, 104px) 0; }
.section--flesh { background: var(--flesh); }
.section--ink { background: var(--ink); color: var(--cream); }
.section--tight { padding: clamp(32px, 5vw, 64px) 0; }

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px 32px;
  padding-bottom: 16px;
  margin-bottom: clamp(24px, 4vw, 48px);
  border-bottom: 1px solid var(--grid);
}
.eyebrow {
  display: block;
  font-size: var(--fs-13);
  font-weight: 700;
  letter-spacing: .22em;
  color: var(--guava);
  margin-bottom: 10px;
}
.section--ink .eyebrow { color: var(--mango); }
.section-title { font-size: var(--fs-48); }
.section-title--lg { font-size: var(--fs-96); }
.lede { max-width: 68ch; color: var(--ink-70); }
.section--ink .lede { color: var(--cream-70); }

.grid-12 { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); gap: clamp(16px, 2.4vw, 32px); }
.span-3 { grid-column: span 3; }
.span-4 { grid-column: span 4; }
.span-5 { grid-column: span 5; }
.span-6 { grid-column: span 6; }
.span-7 { grid-column: span 7; }
.span-8 { grid-column: span 8; }
.span-12 { grid-column: span 12; }

.prose { max-width: 68ch; }
.prose p + p { margin-top: 1.1em; }
.prose h2 { font-size: var(--fs-28); margin: 1.6em 0 .6em; }
.prose h3 { font-family: var(--font-body); font-size: var(--fs-17); font-weight: 700; margin: 1.4em 0 .5em; }
.prose ul, .prose ol { margin: 1em 0 1em 1.2em; }
.prose ul li { list-style: none; position: relative; padding-left: 20px; margin-bottom: .5em; }
.prose ul li::before { content: ""; position: absolute; left: 0; top: .8em; width: 8px; height: 8px; background: var(--guava); }
.prose ol { list-style: decimal; }
.prose ol li { margin-bottom: .5em; }
.prose a { color: var(--guava-deep); border-bottom: 2px solid var(--mango); }
.prose a:hover { background: var(--mango); }

/* ---------- 通用控件 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  padding: 10px 22px;
  border: var(--line) solid var(--ink);
  background: transparent;
  color: var(--ink);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .04em;
  cursor: pointer;
  transition: background .18s var(--ease), color .18s var(--ease), transform .18s var(--ease), border-color .18s var(--ease);
}
.btn:hover { transform: translateY(-3px); }
.btn--solid { background: var(--guava); border-color: var(--guava); color: var(--cream); }
.btn--solid:hover { background: var(--guava-deep); border-color: var(--guava-deep); }
.btn--ghost:hover { background: var(--ink); color: var(--cream); }
.btn--light { border-color: var(--cream); color: var(--cream); }
.btn--light:hover { background: var(--cream); color: var(--ink); }
.btn--block { width: 100%; }

.pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 28px;
  padding: 3px 12px;
  background: var(--mango);
  color: var(--ink);
  font-size: var(--fs-13);
  font-weight: 700;
  letter-spacing: .06em;
  font-variant-numeric: tabular-nums;
}
.pill--ink { background: var(--ink); color: var(--cream); }
.pill--lime { background: var(--lime); color: var(--cream); }
.pill--blueberry { background: var(--blueberry); color: var(--cream); }
.pill--dragon { background: var(--dragon); color: var(--cream); }

.chip {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 8px 16px;
  border: var(--line) solid var(--ink);
  background: var(--cream);
  color: var(--ink);
  font-size: var(--fs-13);
  font-weight: 700;
  letter-spacing: .06em;
  cursor: pointer;
  transition: background .18s var(--ease), color .18s var(--ease);
}
.chip:hover { background: var(--flesh); }
.chip[aria-pressed="true"] { background: var(--ink); color: var(--cream); }
.chip[aria-pressed="true"]:hover { background: var(--guava); }

.breadcrumb { padding: 16px 0 0; font-size: var(--fs-13); letter-spacing: .06em; color: var(--ink-55); }
.breadcrumb ol { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
.breadcrumb li { display: flex; align-items: center; gap: 8px; }
.breadcrumb li + li::before { content: "/"; color: var(--grid); }
.breadcrumb a:hover { color: var(--guava); }

.slice-band { height: 8px; border: 0; background: linear-gradient(90deg, var(--guava), var(--mango)); }

/* ---------- 步骤条 ---------- */
.step-rail { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); border: var(--line) solid var(--ink); background: var(--cream); }
.step-rail__btn {
  display: block;
  width: 100%;
  min-height: 44px;
  padding: 18px 20px;
  text-align: left;
  border-left: 1px solid var(--grid);
  background: var(--cream);
  cursor: pointer;
  transition: background .18s var(--ease), color .18s var(--ease);
}
.step-rail__btn:first-child { border-left: 0; }
.step-rail__btn:hover { background: var(--flesh); }
.step-rail__btn.is-active { background: var(--guava); color: var(--cream); }
.step-rail__btn.is-active:hover { background: var(--guava-deep); }
.step-rail__num { display: block; font-family: var(--font-head); font-weight: 900; font-size: var(--fs-28); line-height: 1; font-variant-numeric: tabular-nums; }
.step-rail__label { display: block; margin-top: 8px; font-size: var(--fs-13); font-weight: 700; letter-spacing: .08em; }
.step-panel { padding: clamp(20px, 3vw, 36px); border: var(--line) solid var(--ink); border-top: 0; background: var(--flesh); }

/* ---------- 图片容器基础规则 ---------- */
.media-frame {
  position: relative;
  display: block;
  width: 100%;
  background: var(--flesh);
  border: 1px solid var(--grid);
  overflow: hidden;
}
.media-frame img { width: 100%; height: 100%; object-fit: cover; }
.media-frame figcaption { padding: 10px 14px; font-size: var(--fs-13); color: var(--ink-70); background: var(--cream); border-top: 1px solid var(--grid); }
.media-frame--wide { aspect-ratio: 16 / 9; }
.media-frame--square { aspect-ratio: 1 / 1; }
.media-frame--portrait { aspect-ratio: 3 / 4; }
.media-frame--slice { aspect-ratio: 21 / 9; }
.media-frame[data-empty]::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(135deg, transparent 0 10px, rgba(217, 204, 188, .55) 10px 11px);
}

/* ---------- 显现 ---------- */
[data-reveal] { opacity: .6; transform: translateY(16px); transition: opacity .5s var(--ease), transform .5s var(--ease); }
[data-reveal].is-visible { opacity: 1; transform: none; }

/* ============================================================
   刊头
   ============================================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: var(--cream);
  border-bottom: 1px solid var(--grid);
}

.skip-link {
  position: absolute;
  left: 50%;
  top: 0;
  z-index: 120;
  padding: 10px 18px;
  background: var(--ink);
  color: var(--cream);
  font-size: var(--fs-13);
  font-weight: 700;
  letter-spacing: .1em;
  transform: translate(-50%, -130%);
  transition: transform .18s var(--ease);
}
.skip-link:focus { transform: translate(-50%, 0); }

.header-rail {
  background: var(--ink);
  color: var(--cream);
  overflow: hidden;
  max-height: 60px;
  transition: max-height .22s var(--ease), opacity .22s var(--ease);
}
.rail-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 38px;
  font-size: var(--fs-13);
  letter-spacing: .06em;
}
.rail-note { display: flex; align-items: center; gap: 8px; color: var(--cream-70); }
.rail-dot { width: 8px; height: 8px; background: var(--mango); flex: none; }
.rail-link {
  display: inline-flex;
  align-items: center;
  min-height: 38px;
  color: var(--cream);
  font-weight: 700;
  border-bottom: 2px solid transparent;
  transition: color .18s var(--ease), border-color .18s var(--ease);
}
.rail-link:hover { color: var(--mango); border-bottom-color: var(--mango); }

.masthead { padding: 20px 0 16px; border-bottom: 1px solid var(--grid); transition: padding .22s var(--ease); }
.masthead-inner { display: flex; justify-content: center; text-align: center; }
.brand { display: inline-flex; flex-direction: column; align-items: center; gap: 4px; }
.brand-mark {
  position: relative;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(32px, 4.6vw, 54px);
  line-height: 1.05;
  letter-spacing: -.03em;
  transition: font-size .22s var(--ease);
}
.brand-mark::after {
  content: "";
  position: absolute;
  top: .16em;
  right: -.44em;
  width: .24em;
  height: .24em;
  background: var(--guava);
}
.brand-sub {
  font-size: var(--fs-13);
  letter-spacing: .16em;
  color: var(--ink-55);
  font-variant-numeric: tabular-nums;
}

.site-header.is-stuck .header-rail { max-height: 0; opacity: 0; }
.site-header.is-stuck .masthead { padding: 8px 0; }
.site-header.is-stuck .brand-mark { font-size: clamp(20px, 2.6vw, 26px); }
.site-header.is-stuck .brand-mark::after { width: .22em; height: .22em; }
.site-header.is-stuck .brand-sub { display: none; }

.nav-bar { background: var(--cream); border-bottom: 1px solid var(--grid); }
.nav-inner { display: flex; align-items: center; justify-content: center; flex-wrap: wrap; min-height: 52px; }

.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  min-height: 44px;
  padding: 8px 14px;
  border: var(--line) solid var(--ink);
  font-size: var(--fs-13);
  font-weight: 700;
  letter-spacing: .12em;
  cursor: pointer;
  transition: background .18s var(--ease), color .18s var(--ease);
}
.nav-toggle:hover { background: var(--ink); color: var(--cream); }
.nav-toggle-bars { display: inline-flex; flex-direction: column; justify-content: center; gap: 4px; width: 18px; }
.nav-toggle-bars span { display: block; height: 2px; background: currentColor; transition: transform .18s var(--ease), opacity .18s var(--ease); }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }
.nav-toggle-label { white-space: nowrap; }

.nav-list { display: flex; align-items: stretch; justify-content: center; flex-wrap: wrap; }
.nav-list > li { display: flex; border-left: 1px solid var(--grid); }
.nav-list > li:first-child { border-left: 0; }

.nav-link {
  position: relative;
  isolation: isolate;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 52px;
  padding: 0 22px;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--ink);
  overflow: hidden;
  transition: color .18s var(--ease), transform .18s var(--ease);
}
.nav-link::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: var(--guava);
  transform: translateY(100%);
  transition: transform .18s var(--ease);
}
.nav-link:hover::before,
.nav-link:focus-visible::before { transform: translateY(0); }
.nav-link:hover,
.nav-link:focus-visible { color: var(--cream); transform: translateY(-3px); }
.nav-link[aria-current="page"] { background: var(--guava); color: var(--cream); }
.nav-link[aria-current="page"]::before { background: var(--guava-deep); transform: translateY(0); }
.nav-link[aria-current="page"]:hover,
.nav-link[aria-current="page"]:focus-visible { transform: none; }

.scroll-progress { height: 4px; background: var(--flesh); }
.scroll-progress-bar { display: block; height: 100%; width: 0; background: var(--guava); transition: width .12s linear; }

/* ============================================================
   页脚
   ============================================================ */
.site-footer { background: var(--ink); color: var(--cream); border-top: 8px solid var(--guava); }
.footer-grid {
  display: grid;
  grid-template-columns: 1fr 1.25fr 1fr;
  gap: clamp(24px, 4vw, 56px);
  padding: clamp(40px, 6vw, 72px) 0 clamp(28px, 4vw, 44px);
}
.footer-col { border-top: 3px solid var(--guava); padding-top: 20px; }
.footer-col--index { border-top-color: var(--guava); }
.footer-col--service { border-top-color: var(--tangerine); }
.footer-col--site { border-top-color: var(--dragon); }

.footer-heading {
  font-family: var(--font-body);
  font-size: var(--fs-13);
  font-weight: 700;
  letter-spacing: .2em;
  color: var(--mango);
  margin-bottom: 16px;
}
.footer-list li { font-size: 15px; line-height: 2.1; color: var(--cream-70); }
.footer-list--contact li { display: flex; flex-wrap: wrap; align-items: baseline; gap: 4px 12px; }
.footer-label { flex: none; min-width: 4.5em; font-size: var(--fs-13); letter-spacing: .1em; color: var(--cream-45); }
.footer-value { color: var(--cream); font-variant-numeric: tabular-nums; }
.footer-link {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  color: var(--cream-70);
  border-bottom: 2px solid transparent;
  transition: color .18s var(--ease), border-color .18s var(--ease);
}
.footer-link:hover { color: var(--mango); border-bottom-color: var(--mango); }

.footer-base {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 32px;
  padding: 20px 0 40px;
  border-top: 1px solid rgba(251, 247, 241, .18);
  font-size: var(--fs-13);
  letter-spacing: .04em;
  color: var(--cream-45);
}
.footer-base-brand { color: var(--cream-70); font-weight: 700; letter-spacing: .08em; }
.footer-note { max-width: 62ch; }
.footer-copy { font-variant-numeric: tabular-nums; white-space: nowrap; }

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 1024px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-col--site { grid-column: span 2; }
}

@media (max-width: 900px) {
  .nav-inner { justify-content: space-between; align-items: center; padding: 8px 0; }
  .nav-toggle { display: inline-flex; }
  .primary-nav {
    display: none;
    width: 100%;
    margin-top: 8px;
    border-top: 1px solid var(--grid);
  }
  .primary-nav[data-open] { display: block; }
  .nav-list { flex-direction: column; align-items: stretch; }
  .nav-list > li { border-left: 0; border-top: 1px solid var(--grid); }
  .nav-list > li:first-child { border-top: 0; }
  .nav-link { min-height: 52px; justify-content: flex-start; padding: 0 6px; font-size: 16px; }
  .nav-link::before { transform: translateY(0) scaleX(0); transform-origin: left center; }
  .nav-link:hover::before,
  .nav-link:focus-visible::before,
  .nav-link[aria-current="page"]::before { transform: translateY(0) scaleX(1); }
  .nav-link:hover,
  .nav-link:focus-visible { transform: none; }

  .span-3, .span-4, .span-5, .span-6, .span-7, .span-8 { grid-column: span 12; }
  .step-rail { grid-template-columns: 1fr; }
  .step-rail__btn { border-left: 0; border-top: 1px solid var(--grid); }
  .step-rail__btn:first-child { border-top: 0; }
  .brand-mark { font-size: clamp(30px, 8vw, 44px); }
  .rail-inner { flex-wrap: wrap; row-gap: 0; }
  .rail-note { font-size: 12px; }
}

@media (max-width: 760px) {
  .footer-grid { grid-template-columns: 1fr; }
  .footer-col--site { grid-column: auto; }
  .footer-base { flex-direction: column; align-items: flex-start; }
  .footer-note { max-width: none; }
  .site-footer { border-top-width: 6px; }
}

/* ---------- 减少动态效果 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    transition-duration: .001ms !important;
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
  }
  [data-reveal] { opacity: 1; transform: none; }
  .btn:hover, .nav-link:hover, .nav-link:focus-visible { transform: none; }
  .scroll-progress-bar { transition: none; }
}

/* ---------- 打印 ---------- */
@media print {
  .site-header, .site-footer, .scroll-progress { display: none; }
  body { background: #fff; color: #000; }
}