/* ============================================================
   城乡觅谷 · 企业官网
   主题：城乡双向流通 —— 谷纸米白 / 橄榄绿 / 麦秆金
   字体：宋体标题 + 黑体正文 + 等宽数据
   ============================================================ */

/* ---------- 设计 tokens ---------- */
:root {
  --paper: #F5F2E9;
  --paper-2: #EDE8DA;
  --card: #FBF9F2;
  --ink: #262D20;
  --olive: #44513A;
  --olive-deep: #2E3828;
  --straw: #B9913A;
  --clay: #7C6B52;
  --mist: #DCD6C4;
  --seal: #A82F24;

  --font-display: "Songti SC", "STSong", "Noto Serif SC", "Source Han Serif SC", "SimSun", serif;
  --font-body: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --font-mono: "SF Mono", "JetBrains Mono", Menlo, Consolas, "Liberation Mono", monospace;

  --container: 1080px;
  --header-h: 68px;
}

/* ---------- 基础 ---------- */
* { margin: 0; padding: 0; box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 16px);
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}

body {
  font-family: var(--font-body);
  background: var(--paper);
  color: var(--ink);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img, svg { display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
button { font-family: inherit; }

.mono { font-family: var(--font-mono); font-size: 0.9em; }

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

::selection { background: var(--straw); color: var(--paper); }

/* ---------- 顶栏 ---------- */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 60;
  background: rgba(245, 242, 233, 0.88);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid transparent;
  transition: border-color .3s ease;
}
.site-header.scrolled { border-bottom-color: var(--mist); }

.header-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
  height: var(--header-h);
  display: flex;
  align-items: center;
  gap: 32px;
}

.brand { display: flex; align-items: center; gap: 12px; margin-right: auto; }
.brand-seal { display: grid; place-items: center; }
.brand-text { display: flex; flex-direction: column; line-height: 1.2; }
.brand-name {
  font-family: var(--font-display);
  font-size: 21px;
  font-weight: 700;
  letter-spacing: 0.12em;
}
.brand-en {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  color: var(--clay);
  text-transform: uppercase;
}

.site-nav { display: flex; gap: 28px; }
.site-nav a {
  position: relative;
  font-size: 15px;
  color: var(--olive);
  padding: 6px 0;
}
.site-nav a::after {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  width: 100%; height: 1.5px;
  background: var(--straw);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .25s ease;
}
.site-nav a:hover::after,
.site-nav a:focus-visible::after { transform: scaleX(1); }

.nav-mail {
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--clay);
  border: 1px solid var(--mist);
  border-radius: 999px;
  padding: 5px 14px;
  transition: border-color .25s ease, color .25s ease;
}
.nav-mail:hover { border-color: var(--straw); color: var(--ink); }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 6px;
  background: none;
  border: 0;
  cursor: pointer;
  padding: 8px 4px;
}
.nav-toggle span {
  display: block;
  width: 22px; height: 2px;
  background: var(--ink);
  transition: transform .25s ease;
}
.nav-toggle[aria-expanded="true"] span:first-child { transform: translateY(4px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:last-child { transform: translateY(-4px) rotate(-45deg); }

/* ---------- Hero ---------- */
.hero {
  padding: calc(var(--header-h) + 72px) 0 64px;
  background:
    radial-gradient(ellipse 60% 55% at 82% 18%, rgba(185, 145, 58, 0.10), transparent 70%),
    radial-gradient(ellipse 45% 45% at 6% 88%, rgba(68, 81, 58, 0.06), transparent 70%),
    var(--paper);
}

.hero-inner {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.4fr);
  gap: 44px;
  align-items: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.08em;
  color: var(--clay);
  margin-bottom: 22px;
}
.eyebrow-dot {
  width: 7px; height: 7px;
  background: var(--straw);
  transform: rotate(45deg);
  flex: none;
}

.hero-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(38px, 5.2vw, 58px);
  line-height: 1.28;
  letter-spacing: 0.02em;
  color: var(--olive-deep);
}

.hero-sub {
  margin-top: 22px;
  max-width: 30em;
  font-size: 16.5px;
  color: var(--clay);
}

.hero-actions { margin-top: 34px; display: flex; align-items: center; gap: 18px; flex-wrap: wrap; }

.btn {
  display: inline-block;
  font-size: 15px;
  padding: 12px 26px;
  border-radius: 3px;
  transition: background-color .25s ease, color .25s ease, border-color .25s ease, transform .15s ease;
}
.btn:active { transform: translateY(1px); }
.btn-solid {
  background: var(--olive);
  color: var(--paper);
}
.btn-solid:hover, .btn-solid:focus-visible { background: var(--olive-deep); }
.btn-ghost {
  border: 1px solid var(--olive);
  color: var(--olive);
}
.btn-ghost:hover, .btn-ghost:focus-visible { background: var(--olive); color: var(--paper); }

.hero-note {
  margin-top: 30px;
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
  font-size: 13px;
  color: var(--clay);
}
.note-sep {
  width: 3px; height: 3px;
  border-radius: 50%;
  background: var(--straw);
  display: inline-block;
  flex: none;
}

/* ---------- Hero 双向流通图 ---------- */
.hero-diagram { align-self: center; }
.hero-diagram svg { width: 100%; height: auto; }

/* 宽屏时图向右出血到视口边缘，让图更大、字更清晰 */
@media (min-width: 1180px) {
  .hero-diagram {
    width: calc(100% + (100vw - 1160px) / 2);
    margin-right: calc((100vw - 1160px) / -2);
  }
}

.mtn {
  fill: none;
  stroke: var(--olive);
  stroke-width: 2.5;
  stroke-linejoin: round;
  opacity: 0.5;
}
.mtn-back { opacity: 0.28; }

.hut { fill: var(--card); stroke: var(--olive); stroke-width: 2.5; }
.hut-roof { fill: none; stroke: var(--straw); stroke-width: 3; stroke-linejoin: round; }
.hut-door { fill: none; stroke: var(--olive); stroke-width: 2; }

.wheat line {
  stroke: var(--straw);
  stroke-width: 2.5;
  stroke-linecap: round;
}

.bld {
  fill: none;
  stroke: var(--olive);
  stroke-width: 2.5;
  opacity: 0.55;
}
.bld-tall { opacity: 0.75; }
.city-dot { fill: var(--straw); }

.node-ring {
  fill: var(--card);
  stroke: var(--olive);
  stroke-width: 2.5;
}
.node-core { fill: var(--olive); }

.route {
  fill: none;
  stroke-width: 3;
  stroke-dasharray: 7 10;
}
.route-up { stroke: var(--straw); }
.route-down { stroke: var(--olive); opacity: 0.75; }

.arrow-gold { fill: var(--straw); }
.arrow-olive { fill: var(--olive); }

.dot { fill: var(--straw); }
.dot-down { fill: var(--olive); }

.svg-label {
  font-family: var(--font-body);
  font-size: 16px;
  fill: var(--clay);
}
.svg-label-village, .svg-label-city { fill: var(--olive); font-weight: 700; font-size: 18px; }
.svg-label-node { font-weight: 700; fill: var(--olive-deep); font-size: 19px; }
.svg-label-route { font-family: var(--font-mono); font-size: 15px; }
.svg-label-up { fill: var(--straw); }
.svg-label-down { fill: var(--olive); }
.svg-label-legend { font-size: 14px; fill: var(--clay); }
.legend-dot { stroke: none; }
.legend-up { fill: var(--straw); }
.legend-down { fill: var(--olive); }

/* 线路流动动画（尊重系统减少动效设置） */
@media (prefers-reduced-motion: no-preference) {
  .route { animation: route-flow 1.2s linear infinite; }
  @keyframes route-flow { to { stroke-dashoffset: -17; } }
  .dot {
    offset-path: path('M 340 160 L 455 142 L 570 160 L 735 126');
    animation: dot-travel 6s linear infinite;
  }
  .dot-down {
    offset-path: path('M 570 178 L 455 166 L 340 178 L 255 242');
    animation: dot-travel 6s linear infinite;
  }
  @keyframes dot-travel { to { offset-distance: 100%; } }
}

/* ---------- 角色流动条 ---------- */
.strip {
  background: var(--olive-deep);
  color: var(--paper-2);
  overflow: hidden;
  padding: 13px 0;
  border-top: 1px solid rgba(245, 242, 233, 0.14);
  border-bottom: 1px solid rgba(245, 242, 233, 0.14);
}
.strip-track {
  display: flex;
  align-items: center;
  gap: 26px;
  width: max-content;
  font-size: 14.5px;
  letter-spacing: 0.14em;
}
.strip-sep {
  width: 5px; height: 5px;
  background: var(--straw);
  transform: rotate(45deg);
  flex: none;
}
@media (prefers-reduced-motion: no-preference) {
  .strip-track { animation: strip-scroll 26s linear infinite; }
  @keyframes strip-scroll { to { transform: translateX(-50%); } }
}

/* ---------- 通用 section ---------- */
.section { padding: 96px 0; }
.section-tinted { background: var(--paper-2); }

.section-grid {
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  gap: 64px;
  align-items: start;
}

.section-head { max-width: 34em; margin-bottom: 52px; }

.section-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(28px, 3.4vw, 38px);
  line-height: 1.35;
  letter-spacing: 0.02em;
  color: var(--olive-deep);
  margin-bottom: 20px;
}

.lead-text { font-size: 16px; color: var(--clay); max-width: 34em; }
.lead-text + .lead-text { margin-top: 14px; }

/* ---------- 关于：事实行 ---------- */
.facts {
  margin-top: 36px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}
.fact {
  border-top: 1px solid var(--mist);
  padding-top: 14px;
  display: flex;
  gap: 12px;
  align-items: flex-start;
}
.fact-num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--straw);
  padding-top: 3px;
}
.fact strong { display: block; font-size: 15px; color: var(--olive-deep); font-weight: 700; }
.fact em { font-style: normal; font-size: 13px; color: var(--clay); }

/* ---------- 主体信息卡 ---------- */
.id-card, .contact-card {
  background: var(--card);
  border: 1px solid var(--mist);
  border-radius: 4px;
  padding: 26px 28px;
  box-shadow: 0 1px 0 rgba(38, 45, 32, 0.04);
}
.id-card-title {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--clay);
  text-transform: uppercase;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--mist);
  margin-bottom: 8px;
}
.id-row {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding: 11px 0;
  border-bottom: 1px dashed rgba(220, 214, 196, 0.7);
}
.id-row:last-child { border-bottom: 0; }
.id-row dt {
  flex: none;
  font-size: 13.5px;
  color: var(--clay);
}
.id-row dd {
  font-size: 14px;
  color: var(--ink);
  text-align: right;
  overflow-wrap: anywhere;
}

/* ---------- 业务模式：面单 ---------- */
.waybills {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}

.waybill {
  position: relative;
  background: var(--card);
  border: 1.5px dashed var(--clay);
  border-radius: 4px;
  padding: 26px 28px 20px;
}
/* 面单撕角 */
.waybill::before,
.waybill::after {
  content: "";
  position: absolute;
  width: 15px; height: 15px;
  background: var(--paper-2);
  border-radius: 50%;
  top: -9px;
}
.waybill::before { left: 38px; }
.waybill::after { right: 38px; }

.waybill-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--mist);
}
.waybill-brand {
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--olive-deep);
}
.waybill-no { font-size: 11.5px; color: var(--clay); letter-spacing: 0.08em; }

.waybill-route {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 0;
  flex-wrap: wrap;
}
.waybill-from, .waybill-to { font-size: 13px; color: var(--olive); letter-spacing: 0.05em; }
.waybill-arrow { color: var(--straw); font-size: 18px; }

.steps { display: flex; flex-direction: column; gap: 0; }
.step {
  display: flex;
  gap: 14px;
  align-items: baseline;
  padding: 8px 0;
  border-bottom: 1px dashed rgba(220, 214, 196, 0.8);
}
.step:last-child { border-bottom: 0; }
.step-no {
  font-size: 12px;
  color: var(--straw);
  min-width: 26px;
}
.step-text { font-size: 15px; color: var(--ink); }

.waybill-tag {
  margin-top: 16px;
  display: inline-block;
  font-size: 12.5px;
  letter-spacing: 0.1em;
  color: var(--olive);
  border: 1px solid var(--olive);
  border-radius: 999px;
  padding: 3px 12px;
}

.barcode {
  margin-top: 18px;
  height: 26px;
  background: 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
  );
  opacity: 0.75;
}

/* ---------- 平台能力 ---------- */
.caps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.cap {
  background: var(--card);
  border: 1px solid var(--mist);
  border-radius: 4px;
  padding: 26px 24px;
  transition: transform .25s ease, border-color .25s ease, box-shadow .25s ease;
}
.cap:hover {
  transform: translateY(-3px);
  border-color: rgba(185, 145, 58, 0.55);
  box-shadow: 0 10px 26px rgba(46, 56, 40, 0.07);
}
.cap-icon {
  display: inline-grid;
  place-items: center;
  width: 46px; height: 46px;
  border: 1px solid rgba(185, 145, 58, 0.5);
  border-radius: 50%;
  color: var(--straw);
  margin-bottom: 16px;
}
.cap h3 {
  font-size: 16.5px;
  font-weight: 700;
  color: var(--olive-deep);
  margin-bottom: 8px;
}
.cap p { font-size: 14px; color: var(--clay); }

/* ---------- 联系我们 ---------- */
.mail-big {
  margin-top: 34px;
  display: inline-flex;
  flex-direction: column;
  gap: 4px;
  border-bottom: 2px solid var(--straw);
  padding-bottom: 10px;
}
.mail-label {
  font-size: 11.5px;
  letter-spacing: 0.18em;
  color: var(--clay);
}
.mail-addr {
  font-family: var(--font-mono);
  font-size: clamp(19px, 2.4vw, 25px);
  color: var(--olive-deep);
}
.mail-big:hover .mail-addr { color: var(--straw); }

/* ---------- 页脚 ---------- */
.site-footer {
  background: var(--olive-deep);
  color: var(--paper-2);
  padding: 44px 0 36px;
}
.footer-inner {
  display: flex;
  flex-direction: column;
  gap: 18px;
  align-items: flex-start;
}
.footer-brand { display: flex; align-items: center; gap: 12px; }
.brand-seal-sm { display: grid; place-items: center; }
.footer-brand-text { display: flex; flex-direction: column; line-height: 1.35; }
.footer-brand-text strong {
  font-family: var(--font-display);
  font-size: 18px;
  letter-spacing: 0.12em;
}
.footer-brand-text em { font-style: normal; font-size: 12.5px; color: rgba(245, 242, 233, 0.6); }

.footer-links {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
  font-size: 13px;
  color: rgba(245, 242, 233, 0.75);
}
.footer-links a { border-bottom: 1px solid rgba(185, 145, 58, 0.6); }
.footer-links a:hover { color: var(--straw); }
.footer-links .note-sep { background: var(--straw); opacity: 0.6; }

.footer-copy { font-size: 12px; color: rgba(245, 242, 233, 0.5); }

/* ---------- 滚动揭示 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity .6s ease, transform .6s ease;
}
.reveal.in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
}

/* ---------- 响应式 ---------- */
@media (max-width: 980px) {
  .header-inner { gap: 24px; }
  .site-nav { gap: 22px; }
  .nav-mail { display: none; }
}

@media (max-width: 900px) {
  .hero-inner { grid-template-columns: 1fr; gap: 40px; }
  .hero { padding-top: calc(var(--header-h) + 48px); }
  .hero-diagram { max-width: 640px; }

  .section-grid { grid-template-columns: 1fr; gap: 40px; }
  .waybills { grid-template-columns: 1fr; }
  .caps { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 720px) {
  .site-nav {
    position: absolute;
    top: var(--header-h);
    left: 0; right: 0;
    flex-direction: column;
    gap: 0;
    background: var(--paper);
    border-bottom: 1px solid var(--mist);
    padding: 8px 24px 16px;
    display: none;
  }
  .site-nav.open { display: flex; }
  .site-nav a { padding: 12px 0; border-bottom: 1px dashed rgba(220, 214, 196, 0.7); }

  .nav-mail { display: none; }
  .nav-toggle { display: flex; }

  .facts { grid-template-columns: 1fr; }
  .caps { grid-template-columns: 1fr; }
  .section { padding: 72px 0; }

  .waybill::before { left: 24px; }
  .waybill::after { right: 24px; }
}