/* ===========================================================
   杏运平台官网 · 全站共享样式  /assets/site.css
   色板：杏果暖橙 / 青秀山黛绿 / 米白 / 朱砂红
   形状：单方向切角 + 斜线分隔 + 流程弧线
   =========================================================== */

/* ---------- 1 · Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body, h1, h2, h3, h4, p, figure, blockquote, dl, dd, ul, ol { margin: 0; }
ul, ol { padding: 0; list-style: none; }
img, svg, video { display: block; max-width: 100%; }
button { font: inherit; color: inherit; background: none; border: 0; padding: 0; cursor: pointer; }
a { color: inherit; text-decoration: none; }

/* ---------- 2 · 变量 ---------- */
:root {
  --c-orange: #F28C28;
  --c-orange-deep: #C96A12;
  --c-orange-tint: #FBE0C4;
  --c-green: #2E6B4F;
  --c-green-tint: #E4EFE8;
  --c-cream: #FDF6EC;
  --c-vermilion: #C0392B;
  --c-ink: #1F2A24;
  --c-muted: #5A6B62;
  --c-border: #E6DACA;
  --c-surface: #FFFFFF;

  --font-head: "HarmonyOS Sans SC", "Source Han Sans SC", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --font-body: "Source Han Serif SC", "Noto Serif SC", "Songti SC", "SimSun", Georgia, serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --fs-xs: 14px;
  --fs-base: 17px;
  --fs-md: 21px;
  --fs-lg: 26px;
  --fs-xl: 34px;
  --fs-2xl: 46px;

  --shell: 1180px;
  --gutter: clamp(18px, 4vw, 40px);
  --cut: 16px;
  --t: 200ms;
  --ease: ease-out;
  --lift: drop-shadow(0 14px 18px rgba(31, 42, 36, 0.16));
}

/* ---------- 3 · 中文排版与基础元素 ---------- */
body {
  background: var(--c-cream);
  color: var(--c-ink);
  font-family: var(--font-body);
  font-size: var(--fs-base);
  line-height: 1.75;
  overflow-wrap: break-word;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: var(--font-head);
  font-weight: 600;
  color: var(--c-ink);
  line-height: 1.3;
  letter-spacing: -0.008em;
}
h1 { font-size: clamp(30px, 4.6vw, var(--fs-2xl)); font-weight: 700; line-height: 1.18; letter-spacing: -0.02em; }
h2 { font-size: clamp(22px, 3.2vw, var(--fs-xl)); }
h3 { font-size: var(--fs-md); }
h4 { font-size: var(--fs-base); }
p { text-wrap: pretty; }

a { color: var(--c-orange-deep); }
a:hover { color: var(--c-ink); }

.num, code, kbd, samp { font-family: var(--font-mono); font-feature-settings: "tnum" 1; }

:focus-visible { outline: 2px solid var(--c-vermilion); outline-offset: 2px; border-radius: 1px; }

.skip-link {
  position: absolute;
  left: var(--gutter);
  top: -80px;
  z-index: 300;
  padding: 11px 18px;
  background: var(--c-vermilion);
  color: #FFFFFF;
  font-family: var(--font-head);
  font-size: var(--fs-xs);
  font-weight: 600;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%);
  transition: top 180ms var(--ease);
}
.skip-link:focus { top: 12px; }

/* ---------- 4 · 布局骨架 ---------- */
.shell {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section { padding-block: clamp(34px, 5vw, 66px); }
.section--tight { padding-block: clamp(22px, 3vw, 38px); }
.section--tint { background: var(--c-orange-tint); }
.section--green { background: var(--c-green-tint); }

.rule-slash {
  height: 8px;
  border: 0;
  margin: 0;
  background-image: repeating-linear-gradient(115deg, var(--c-border) 0 1px, transparent 1px 10px);
}

.grid { display: grid; gap: clamp(16px, 2.4vw, 26px); }
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--index { grid-template-columns: 1.2fr 1fr 0.8fr; }
.grid--sidebar { grid-template-columns: minmax(0, 4fr) minmax(0, 8fr); }

/* ---------- 5 · 页头 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  background: var(--c-cream);
  transition: box-shadow var(--t) var(--ease);
}
.site-header[data-scrolled] { box-shadow: 0 16px 30px -26px rgba(31, 42, 36, 0.75); }

.header-upper {
  position: relative;
  background: var(--c-green);
  color: var(--c-cream);
  overflow: hidden;
}
.header-upper::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: repeating-linear-gradient(115deg, rgba(253, 246, 236, 0.09) 0 1px, transparent 1px 16px);
}
.header-upper__inner {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px 18px;
  min-height: 66px;
  padding-block: 9px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  flex: none;
  color: var(--c-cream);
}
.brand__mark {
  width: 36px;
  height: 36px;
  flex: none;
  display: grid;
  place-items: center;
  background: var(--c-orange);
  color: var(--c-ink);
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 19px;
  line-height: 1;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%);
}
.brand__text { display: flex; flex-direction: column; gap: 1px; }
.brand__name {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 18.5px;
  line-height: 1.15;
  letter-spacing: 0.01em;
  color: var(--c-cream);
}
.brand__line {
  font-family: var(--font-head);
  font-weight: 400;
  font-size: 12px;
  line-height: 1.3;
  letter-spacing: 0.09em;
  color: rgba(253, 246, 236, 0.7);
}

.header-upper__note {
  flex: 1 1 220px;
  min-width: 0;
  font-family: var(--font-head);
  font-size: 13.5px;
  line-height: 1.5;
  color: rgba(253, 246, 236, 0.76);
}

.cn-badge {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  flex: none;
  padding: 5px 13px 5px 10px;
  border: 1px solid rgba(253, 246, 236, 0.45);
  border-radius: 999px;
  background: rgba(253, 246, 236, 0.08);
  color: var(--c-cream);
  font-family: var(--font-head);
  font-size: 13px;
  letter-spacing: 0.04em;
  white-space: nowrap;
}
.cn-badge__dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--c-orange);
  box-shadow: 0 0 0 3px rgba(242, 140, 40, 0.26);
}

.header-entry {
  display: inline-flex;
  align-items: center;
  flex: none;
  padding: 9px 16px;
  background: var(--c-vermilion);
  color: #FFFFFF;
  font-family: var(--font-head);
  font-size: var(--fs-xs);
  font-weight: 600;
  white-space: nowrap;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 9px), calc(100% - 9px) 100%, 0 100%);
  transition: background-color var(--t) var(--ease), transform var(--t) var(--ease);
}
.header-entry:hover { background: #A5301F; color: #FFFFFF; transform: translateY(-2px); }

.header-lower {
  position: relative;
  background: var(--c-cream);
  border-bottom: 1px solid var(--c-border);
}
.header-lower__inner {
  display: flex;
  align-items: center;
  gap: 14px;
  min-height: 52px;
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  padding: 9px 14px;
  background: var(--c-orange-tint);
  color: var(--c-ink);
  font-family: var(--font-head);
  font-size: var(--fs-xs);
  font-weight: 600;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 9px), calc(100% - 9px) 100%, 0 100%);
  transition: background-color var(--t) var(--ease);
}
.nav-toggle__bars { display: grid; gap: 3px; width: 16px; }
.nav-toggle__bars i { display: block; height: 2px; border-radius: 2px; background: var(--c-green); }
.nav-toggle[aria-expanded="true"] { background: var(--c-green); color: var(--c-cream); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i { background: var(--c-orange); }

.site-nav { display: flex; min-width: 0; }
.site-nav__list { display: flex; align-items: center; flex-wrap: wrap; }
.site-nav__list li { display: flex; align-items: center; }
.site-nav__list li + li::before {
  content: "/";
  margin: 0 11px;
  color: var(--c-border);
  font-family: var(--font-head);
  font-size: 14px;
  line-height: 1;
}
.site-nav__list a {
  position: relative;
  display: inline-block;
  padding: 8px 2px 9px;
  color: var(--c-ink);
  font-family: var(--font-head);
  font-size: 15.5px;
  font-weight: 500;
  white-space: nowrap;
  transition: color var(--t) var(--ease);
}
.site-nav__list a::after {
  content: "";
  position: absolute;
  left: 2px;
  right: 2px;
  bottom: 3px;
  height: 2px;
  background: var(--c-orange);
  opacity: 0;
  transition: opacity var(--t) var(--ease);
}
.site-nav__list a:hover { color: var(--c-orange-deep); }
.site-nav__list a:hover::after { opacity: 0.5; }
.site-nav__list a[aria-current="page"] { color: var(--c-orange-deep); font-weight: 600; }
.site-nav__list a[aria-current="page"]::after { opacity: 1; }

/* ---------- 6 · 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(48px, 6vw, 84px);
  background: var(--c-green);
  color: rgba(253, 246, 236, 0.86);
  padding-bottom: 26px;
}
.site-footer::before {
  content: "";
  display: block;
  height: 6px;
  background-image: repeating-linear-gradient(115deg, var(--c-orange) 0 14px, var(--c-orange-deep) 14px 28px);
}

.footer-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  gap: 14px 44px;
  padding-block: 38px 24px;
  border-bottom: 1px solid rgba(253, 246, 236, 0.18);
}
.footer-head__brand { flex: none; }
.footer-brand {
  display: inline-block;
  font-family: var(--font-head);
  font-size: clamp(21px, 2.6vw, var(--fs-lg));
  font-weight: 700;
  color: var(--c-cream);
  letter-spacing: -0.01em;
}
.footer-brand:hover { color: var(--c-orange-tint); }
.footer-brand__line {
  margin-top: 4px;
  font-family: var(--font-head);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: rgba(253, 246, 236, 0.62);
}
.footer-head__note {
  flex: 1 1 300px;
  max-width: 46em;
  font-size: 14.5px;
  line-height: 1.75;
  color: rgba(253, 246, 236, 0.78);
}

.footer-cols {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: 30px 26px;
  padding-block: 32px 28px;
}
.footer-col__title {
  margin-bottom: 12px;
  font-family: var(--font-head);
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--c-orange-tint);
}
.footer-list { display: grid; gap: 9px; }
.footer-list a {
  display: inline-block;
  color: rgba(253, 246, 236, 0.86);
  font-size: 15px;
  border-bottom: 1px solid transparent;
  transition: color var(--t) var(--ease), border-color var(--t) var(--ease);
}
.footer-list a:hover { color: #FFFFFF; border-bottom-color: var(--c-orange); }

.footer-contact {
  margin-top: 16px;
  font-size: var(--fs-xs);
  line-height: 1.9;
  color: rgba(253, 246, 236, 0.72);
}
.footer-contact .num { color: var(--c-cream); letter-spacing: 0.02em; }

.footer-base {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 20px;
  padding-top: 18px;
  border-top: 1px solid rgba(253, 246, 236, 0.18);
  font-family: var(--font-head);
  font-size: 13px;
  color: rgba(253, 246, 236, 0.62);
}
.footer-base__dot { margin: 0 6px; color: rgba(253, 246, 236, 0.35); }

/* ---------- 7 · 通用组件 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 12px 22px;
  background: var(--c-orange);
  color: var(--c-ink);
  font-family: var(--font-head);
  font-size: 15.5px;
  font-weight: 600;
  line-height: 1.2;
  text-decoration: none;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%);
  transition: background-color var(--t) var(--ease), transform var(--t) var(--ease);
}
.btn:hover { background: #E07D17; color: var(--c-ink); transform: translateY(-2px); }
.btn--ghost { background: transparent; color: var(--c-orange-deep); box-shadow: inset 0 0 0 2px var(--c-orange-deep); }
.btn--ghost:hover { background: var(--c-orange-tint); color: var(--c-orange-deep); }
.btn--green { background: var(--c-green); color: var(--c-cream); }
.btn--green:hover { background: #245740; color: var(--c-cream); }
.btn--quiet { background: var(--c-orange-tint); color: var(--c-ink); }
.btn--quiet:hover { background: #F7D0A9; color: var(--c-ink); }
.btn--sm { padding: 9px 16px; font-size: var(--fs-xs); }

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 11px;
  background: var(--c-green-tint);
  color: var(--c-green);
  font-family: var(--font-head);
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.04em;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 7px), calc(100% - 7px) 100%, 0 100%);
}
.tag--orange { background: var(--c-orange-tint); color: var(--c-orange-deep); }
.tag--vermilion { background: rgba(192, 57, 43, 0.12); color: var(--c-vermilion); }

.kicker {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--c-orange-deep);
}

.breadcrumb { margin-top: 22px; font-family: var(--font-head); font-size: 13.5px; }
.breadcrumb ol { display: flex; flex-wrap: wrap; align-items: center; }
.breadcrumb li { display: flex; align-items: center; color: var(--c-muted); }
.breadcrumb li + li::before { content: "/"; margin: 0 9px; color: var(--c-border); }
.breadcrumb a { color: var(--c-muted); border-bottom: 1px solid transparent; }
.breadcrumb a:hover { color: var(--c-orange-deep); border-bottom-color: var(--c-orange); }
.breadcrumb [aria-current="page"] { color: var(--c-ink); }

.prose { max-width: 38em; }
.prose > * + * { margin-top: 1.1em; }
.prose h2 { margin-top: 2em; font-size: var(--fs-lg); }
.prose h3 { margin-top: 1.6em; }
.prose ul, .prose ol { display: grid; gap: 0.42em; }
.prose ul li { position: relative; padding-left: 1.4em; }
.prose ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.78em;
  width: 6px;
  height: 6px;
  background: var(--c-orange);
}
.prose a { color: var(--c-orange-deep); border-bottom: 1px solid var(--c-orange); }
.prose a:hover { color: var(--c-ink); border-bottom-color: var(--c-ink); }

.lead {
  max-width: 34em;
  padding-left: 18px;
  border-left: 4px solid var(--c-orange);
  font-size: var(--fs-md);
  line-height: 1.7;
}

.panel {
  position: relative;
  padding: clamp(20px, 3vw, 30px);
  background: var(--c-surface);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--cut)), calc(100% - var(--cut)) 100%, 0 100%);
  transition: transform var(--t) var(--ease), filter var(--t) var(--ease), background-color var(--t) var(--ease);
}
.panel:hover { transform: translateY(-2px); filter: var(--lift); }
.panel--orange { background: var(--c-orange-tint); }
.panel--green { background: var(--c-green-tint); }
.panel--cream { background: var(--c-cream); }

.section-head { display: flex; align-items: baseline; flex-wrap: wrap; gap: 10px 14px; margin-bottom: 18px; }
.section-head__num {
  width: 30px;
  height: 30px;
  flex: none;
  display: grid;
  place-items: center;
  background: var(--c-orange);
  color: var(--c-ink);
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  font-weight: 700;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 9px), calc(100% - 9px) 100%, 0 100%);
}
.section-head h2 { margin: 0; font-size: var(--fs-lg); }
.section-head h3 { margin: 0; }
.section-head__note { color: var(--c-muted); font-size: 14.5px; }

.steps { counter-reset: step; display: grid; gap: 16px; }
.steps li { position: relative; padding-left: 46px; counter-increment: step; }
.steps li::before {
  content: counter(step);
  position: absolute;
  left: 0;
  top: 2px;
  width: 30px;
  height: 30px;
  display: grid;
  place-items: center;
  background: var(--c-orange);
  color: var(--c-ink);
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  font-weight: 700;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 9px), calc(100% - 9px) 100%, 0 100%);
}
.steps li::after {
  content: "";
  position: absolute;
  left: 15px;
  top: 36px;
  bottom: -14px;
  width: 1px;
  background: var(--c-green);
  opacity: 0.35;
}
.steps li:last-child::after { display: none; }
.steps strong { font-weight: 700; }

.data-strip {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 1px;
  background: var(--c-border);
}
.data-strip__item { background: var(--c-surface); padding: 18px 20px; }
.data-strip__num {
  font-family: var(--font-mono);
  font-size: var(--fs-lg);
  font-weight: 700;
  line-height: 1.2;
  color: var(--c-orange-deep);
}
.data-strip__label {
  margin-top: 4px;
  font-family: var(--font-head);
  font-size: 13.5px;
  color: var(--c-muted);
}

.figure { display: grid; gap: 10px; }
.figure__frame {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 10;
  background-color: var(--c-orange-tint);
  background-image: repeating-linear-gradient(115deg, rgba(201, 106, 18, 0.07) 0 1px, transparent 1px 13px);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%);
}
.figure__frame img { width: 100%; height: 100%; object-fit: cover; }
.figure--wide .figure__frame { aspect-ratio: 21 / 9; }
.figure--tall .figure__frame { aspect-ratio: 4 / 5; }
.figure--square .figure__frame { aspect-ratio: 1 / 1; }
.figure__caption {
  font-family: var(--font-head);
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--c-muted);
}

.toc { background: var(--c-surface); padding: clamp(18px, 2.6vw, 26px); }
.toc__title {
  margin-bottom: 12px;
  font-family: var(--font-head);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.14em;
  color: var(--c-muted);
}
.toc__list { display: grid; }
.toc__list a {
  display: block;
  padding: 9px 2px;
  border-bottom: 1px solid var(--c-border);
  color: var(--c-ink);
  font-family: var(--font-head);
  font-size: 15px;
  transition: color var(--t) var(--ease), padding-left var(--t) var(--ease);
}
.toc__list a:hover { color: var(--c-orange-deep); padding-left: 6px; }
.toc__list a[aria-current="true"] { color: var(--c-vermilion); font-weight: 700; padding-left: 6px; }

.anchor-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 2px;
  border-bottom: 1px dashed var(--c-border);
  color: var(--c-muted);
  font-family: var(--font-head);
  font-size: 12.5px;
  transition: color var(--t) var(--ease), border-color var(--t) var(--ease);
}
.anchor-btn:hover { color: var(--c-orange-deep); border-bottom-color: var(--c-orange); }
.anchor-btn[data-copied] { color: var(--c-green); border-bottom-color: var(--c-green); }

/* 进入视口动效 */
[data-js="on"] [data-reveal] {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 260ms var(--ease), transform 260ms var(--ease);
}
[data-js="on"] [data-reveal="shown"] { opacity: 1; transform: none; }

/* ---------- 8 · 响应式 ---------- */
@media (max-width: 1024px) {
  .grid--index { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid--sidebar { grid-template-columns: minmax(0, 1fr); }
  .grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 900px) {
  .header-upper__inner { min-height: 58px; gap: 9px 12px; }
  .header-upper__note { display: none; }
  .header-lower__inner { min-height: 46px; }
}

@media (max-width: 860px) {
  .nav-toggle { display: inline-flex; }
  .site-nav {
    display: none;
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    z-index: 70;
    padding: 6px var(--gutter) 18px;
    background: var(--c-cream);
    border-bottom: 1px solid var(--c-border);
    box-shadow: 0 22px 32px -26px rgba(31, 42, 36, 0.8);
  }
  .site-nav[data-open] { display: block; }
  .site-nav__list { flex-direction: column; align-items: stretch; }
  .site-nav__list li { display: block; }
  .site-nav__list li + li { border-top: 1px solid var(--c-border); }
  .site-nav__list li + li::before { content: none; }
  .site-nav__list a { display: block; padding: 13px 2px; font-size: 16.5px; }
  .site-nav__list a::after { left: 2px; right: auto; width: 26px; bottom: 9px; }
}

@media (max-width: 680px) {
  .grid--2, .grid--3, .grid--index { grid-template-columns: minmax(0, 1fr); }
  .footer-head { padding-block: 28px 20px; }
  .footer-base { flex-direction: column; align-items: flex-start; }
  .lead { font-size: 19px; }
}

@media (max-width: 520px) {
  .brand__mark { width: 32px; height: 32px; font-size: 17px; }
  .brand__name { font-size: 16.5px; }
  .brand__line { font-size: 11px; letter-spacing: 0.06em; }
  .cn-badge { padding: 4px 10px 4px 8px; font-size: 12px; }
  .header-entry { padding: 8px 12px; font-size: 13px; }
}

/* ---------- 9 · 低动效偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  [data-js="on"] [data-reveal] { opacity: 1; transform: none; transition: none; }
  .panel:hover, .btn:hover, .header-entry:hover { transform: none; }
  .skip-link { transition: none; }
}

/* ---------- 10 · 打印 ---------- */
@media print {
  .site-header, .site-footer { position: static; }
  .nav-toggle, .header-entry, .cn-badge { display: none; }
  body { background: #FFFFFF; }
}