/* ============================================================
   site.css — 亚投代理中心 · 坐标地图系统
   ============================================================ */

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 104px;
}

body {
  margin: 0;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-body);
  font-size: clamp(15px, 1.02vw, 17px);
  font-weight: 400;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4, p, figure, blockquote { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }
img, svg { max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; }
hr { border: 0; border-top: 1px solid rgba(46, 90, 90, 0.8); margin: 0; }

#main-content { scroll-margin-top: 104px; }

/* ---------- 2. 变量 ---------- */
:root {
  /* 色板 */
  --ink: #0B1B2B;
  --ink-deep: #071320;
  --panel: #16293A;
  --signal: #FF6B2C;
  --celadon: #6FBF9B;
  --amber: #E0A458;
  --mist: #7FA6C9;
  --paper: #F2EBDD;
  --stone: #8A97A3;
  --teal: #2E5A5A;
  --clay: #C97B5A;

  /* 字体 */
  --font-body: "Noto Sans SC", "Source Han Sans SC", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --font-display: "Noto Sans SC Condensed", "Source Han Sans SC Condensed",
    "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei",
    system-ui, sans-serif;
  --font-mono: "JetBrains Mono", "Noto Sans Mono", ui-monospace, SFMono-Regular,
    Menlo, Consolas, "Courier New", monospace;

  /* 尺度 */
  --wrap: 1320px;
  --gutter: clamp(16px, 3vw, 40px);
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

::selection { background: var(--signal); color: var(--ink); }

:focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: 3px;
  border-radius: 2px;
}

/* ---------- 3. 中文排版基元 ---------- */
.display,
.h2,
.h3 {
  font-family: var(--font-display);
  font-weight: 800;
  text-wrap: balance;
}

.display {
  font-size: clamp(40px, 7vw, 92px);
  line-height: 0.95;
  letter-spacing: -0.02em;
}

.h2 {
  font-size: clamp(26px, 3.6vw, 44px);
  line-height: 1.05;
  letter-spacing: -0.015em;
}

.h3 {
  font-size: clamp(19px, 1.6vw, 23px);
  font-weight: 700;
  line-height: 1.32;
  letter-spacing: 0;
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--signal);
}

.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.prose {
  max-width: 68ch;
  color: rgba(242, 235, 221, 0.86);
  font-size: clamp(15px, 1.02vw, 17px);
  line-height: 1.8;
}

.prose p + p { margin-top: 1em; }
.prose strong { color: var(--paper); font-weight: 700; }
.prose a { color: var(--signal); border-bottom: 1px solid rgba(255, 107, 44, 0.4); }

/* ---------- 4. skip link ---------- */
.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 120;
  padding: 10px 18px;
  background: var(--signal);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  border-radius: 2px;
  transform: translateY(-180%);
  transition: transform 0.2s var(--ease);
}

.skip-link:focus { transform: translateY(0); }

/* ---------- 5. header / 悬浮胶囊 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  padding: clamp(8px, 1.4vw, 16px) var(--gutter);
  background: rgba(7, 19, 32, 0.9);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(46, 90, 90, 0.55);
}

.read-progress {
  position: absolute;
  top: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--celadon), var(--signal));
  transition: width 0.12s linear;
}

.site-header__inner {
  position: relative;
  max-width: var(--wrap);
  margin-inline: auto;
  display: flex;
  align-items: center;
  gap: clamp(10px, 1.6vw, 22px);
  min-height: 60px;
  padding: 8px clamp(12px, 1.5vw, 20px) 8px 12px;
  border: 1px solid rgba(46, 90, 90, 0.7);
  border-radius: 999px;
  background: linear-gradient(180deg, rgba(22, 41, 58, 0.96), rgba(11, 27, 43, 0.96));
  box-shadow: 0 14px 34px -22px #000;
}

/* 品牌 */
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
  min-width: 0;
}

.brand__mark {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.12em;
  line-height: 1;
  padding: 6px 9px;
  color: var(--ink);
  background: var(--signal);
  border-radius: 2px;
}

.brand__text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
  min-width: 0;
}

.brand__name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(15px, 1.3vw, 18px);
  letter-spacing: 0.03em;
  color: var(--paper);
}

.brand__line {
  margin-top: 3px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  color: var(--stone);
  white-space: nowrap;
}

/* 坐标徽记 */
.header-coord {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  flex: 0 0 auto;
  padding: 5px 11px;
  border: 1px solid rgba(46, 90, 90, 0.85);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.09em;
  color: var(--stone);
  white-space: nowrap;
}

.header-coord__dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--celadon);
  box-shadow: 0 0 0 3px rgba(111, 191, 155, 0.18);
}

/* 导航 */
.site-nav { margin-inline: auto; }

.site-nav__list {
  display: flex;
  align-items: center;
  gap: 2px;
}

.site-nav__item { display: flex; }

.site-nav__link {
  display: inline-flex;
  align-items: center;
  padding: 8px 13px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-size: 13.5px;
  font-weight: 500;
  color: rgba(242, 235, 221, 0.78);
  white-space: nowrap;
  transition: color 0.18s var(--ease), background-color 0.18s var(--ease),
    border-color 0.18s var(--ease);
}

.site-nav__link:hover {
  color: var(--paper);
  background: rgba(242, 235, 221, 0.07);
}

.site-nav__link[aria-current="page"] {
  color: var(--signal);
  border-color: rgba(255, 107, 44, 0.5);
  background: rgba(255, 107, 44, 0.12);
}

/* 移动导航按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 8px;
  padding: 9px 14px;
  border: 1px solid rgba(46, 90, 90, 0.9);
  border-radius: 999px;
  background: rgba(242, 235, 221, 0.07);
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  cursor: pointer;
  transition: border-color 0.18s var(--ease), background-color 0.18s var(--ease);
}

.nav-toggle:hover { border-color: var(--signal); }

.nav-toggle__bars {
  display: grid;
  gap: 3px;
  width: 15px;
}

.nav-toggle__bars span {
  display: block;
  height: 1.5px;
  border-radius: 1px;
  background: currentColor;
  transition: transform 0.2s var(--ease), opacity 0.2s var(--ease);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(1) {
  transform: translateY(4.5px) 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(-4.5px) rotate(-45deg);
}

.header-cta { flex: 0 0 auto; }

/* ---------- 6. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 20px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-size: 13.5px;
  font-weight: 700;
  letter-spacing: 0.02em;
  white-space: nowrap;
  cursor: pointer;
  transition: transform 0.18s var(--ease), background-color 0.18s var(--ease),
    color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.btn--signal {
  background: var(--signal);
  border-color: var(--signal);
  color: var(--ink);
}
.btn--signal:hover { background: #ff824f; transform: translateY(-1px); }

.btn--ghost {
  background: transparent;
  border-color: rgba(242, 235, 221, 0.35);
  color: var(--paper);
}
.btn--ghost:hover { border-color: var(--signal); color: var(--signal); }

.btn--paper {
  background: var(--paper);
  border-color: var(--paper);
  color: var(--ink);
}
.btn--paper:hover { background: #ffffff; }

/* ---------- 7. footer / 细窄核对条 ---------- */
.site-footer {
  margin-top: clamp(48px, 8vw, 110px);
  background: linear-gradient(180deg, var(--ink) 0%, var(--ink-deep) 100%);
  border-top: 1px solid rgba(46, 90, 90, 0.7);
  font-size: 14px;
}

.site-footer__inner {
  max-width: var(--wrap);
  margin-inline: auto;
  padding: clamp(32px, 4vw, 56px) var(--gutter) clamp(24px, 3vw, 36px);
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 0.9fr) minmax(0, 1.5fr);
  gap: clamp(24px, 3vw, 48px);
}

.footer-brand__name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(20px, 1.9vw, 24px);
  letter-spacing: 0.04em;
  color: var(--paper);
}

.footer-brand__line {
  margin-top: 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--stone);
}

.footer-brand__tag {
  display: inline-block;
  margin-top: 16px;
  padding: 5px 10px;
  border: 1px dashed rgba(46, 90, 90, 0.95);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--celadon);
}

.footer-col__title {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--stone);
}

.footer-col__title::before {
  content: "";
  width: 14px;
  height: 1px;
  background: var(--signal);
}

.footer-nav__list { display: grid; gap: 9px; }

.footer-nav__link {
  display: inline-block;
  font-size: 14px;
  color: rgba(242, 235, 221, 0.8);
  border-bottom: 1px solid transparent;
  padding-bottom: 1px;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.footer-nav__link:hover {
  color: var(--signal);
  border-color: rgba(255, 107, 44, 0.6);
}

.footer-contact { display: grid; gap: 10px; }

.footer-contact__row {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}

.footer-contact__key {
  min-width: 34px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  color: var(--stone);
}

.footer-contact__val {
  font-size: 13.5px;
  color: var(--paper);
  word-break: break-word;
}

.copy-btn {
  padding: 3px 9px;
  border: 1px solid rgba(46, 90, 90, 0.9);
  border-radius: 999px;
  background: transparent;
  color: var(--mist);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  cursor: pointer;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease),
    background-color 0.18s var(--ease);
}

.copy-btn:hover { border-color: var(--mist); color: var(--paper); }

.copy-btn[data-copied] {
  background: var(--celadon);
  border-color: var(--celadon);
  color: var(--ink);
}

/* 批次核对条 */
.footer-batch {
  max-width: var(--wrap);
  margin-inline: auto;
  padding: 12px var(--gutter);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px clamp(12px, 2vw, 28px);
  border-block: 1px solid rgba(46, 90, 90, 0.8);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--stone);
}

.footer-batch__item {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  opacity: 0.5;
  transform: translateY(6px);
  transition: opacity 0.5s var(--ease), transform 0.5s var(--ease);
}

.footer-batch__key { color: var(--signal); letter-spacing: 0.14em; }

.footer-batch.is-revealed .footer-batch__item { opacity: 1; transform: none; }
.footer-batch.is-revealed .footer-batch__item:nth-child(1) { transition-delay: 0.05s; }
.footer-batch.is-revealed .footer-batch__item:nth-child(2) { transition-delay: 0.13s; }
.footer-batch.is-revealed .footer-batch__item:nth-child(3) { transition-delay: 0.21s; }

.footer-legal {
  max-width: var(--wrap);
  margin-inline: auto;
  padding: 14px var(--gutter) clamp(20px, 3vw, 32px);
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 8px 24px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.09em;
  color: var(--stone);
}

.footer-legal__copy { color: rgba(242, 235, 221, 0.72); }
.footer-legal__note { line-height: 1.6; }
.footer-legal__icp { color: var(--celadon); white-space: nowrap; }

/* ---------- 8. 面包屑 ---------- */
.crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding-block: 20px 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--stone);
}

.crumbs a { color: rgba(242, 235, 221, 0.7); transition: color 0.18s var(--ease); }
.crumbs a:hover { color: var(--signal); }
.crumbs__sep { color: var(--teal); }
.crumbs [aria-current="page"] { color: var(--paper); }

/* ---------- 9. 章节与网格 ---------- */
.section { padding-block: clamp(32px, 5vw, 72px); }

.section__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px 18px;
  margin-bottom: clamp(16px, 2.4vw, 28px);
}

.section__index {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--signal);
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 3fr);
  gap: clamp(20px, 3vw, 44px);
  align-items: start;
}

.grid { display: grid; gap: clamp(14px, 2vw, 26px); }
.grid--2 { grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
.grid--3 { grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); }

.stack { display: grid; gap: clamp(12px, 1.6vw, 20px); }

/* ---------- 10. 印刷边框卡片 ---------- */
.sheet {
  position: relative;
  padding: clamp(18px, 2vw, 26px);
  border: 1px solid rgba(46, 90, 90, 0.85);
  border-radius: 2px;
  background: linear-gradient(180deg, rgba(22, 41, 58, 0.92), rgba(11, 27, 43, 0.92));
  overflow: hidden;
}

.sheet::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 30px;
  height: 30px;
  border-top: 2px solid var(--signal);
  border-left: 2px solid var(--signal);
  opacity: 0.85;
  pointer-events: none;
}

/* ---------- 11. 纵向坐标轴 ---------- */
.coord-rail {
  display: grid;
  gap: 2px;
  border-left: 1px solid rgba(46, 90, 90, 0.8);
}

.coord-rail__item { position: relative; }

.coord-rail__link {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: baseline;
  gap: 9px;
  margin-left: -1px;
  padding: 8px 10px 8px 14px;
  border-left: 2px solid transparent;
  font-size: 13px;
  color: rgba(242, 235, 221, 0.62);
  transition: color 0.18s var(--ease), background-color 0.18s var(--ease),
    border-color 0.18s var(--ease);
}

.coord-rail__link:hover {
  color: var(--paper);
  background: rgba(242, 235, 221, 0.05);
}

.coord-rail__link[data-active],
.coord-rail__link[aria-current="page"] {
  color: var(--signal);
  border-left-color: var(--signal);
  background: rgba(255, 107, 44, 0.08);
}

.coord-rail__code {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  color: var(--stone);
}

.coord-rail__link[data-active] .coord-rail__code,
.coord-rail__link[aria-current="page"] .coord-rail__code { color: var(--signal); }

/* ---------- 12. 图像容器（页面阶段放占位） ---------- */
.media-frame {
  position: relative;
  display: block;
  overflow: hidden;
  isolation: isolate;
  aspect-ratio: 16 / 10;
  border: 1px solid rgba(46, 90, 90, 0.85);
  border-radius: 2px;
  background: linear-gradient(135deg, rgba(22, 41, 58, 0.95), rgba(11, 27, 43, 0.95));
}

.media-frame::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(46, 90, 90, 0.35) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(46, 90, 90, 0.35) 1px, transparent 1px);
  background-size: 32px 32px;
  pointer-events: none;
}

.media-frame img,
.media-frame svg {
  position: relative;
  z-index: 1;
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media-frame--wide { aspect-ratio: 21 / 9; }
.media-frame--tall { aspect-ratio: 3 / 4; }
.media-frame--square { aspect-ratio: 1 / 1; }

.media-frame__caption {
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--stone);
}

/* ---------- 13. 标签与清单 ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 9px;
  border: 1px solid currentColor;
  border-radius: 2px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  line-height: 1.4;
}

.tag--register {
  color: var(--celadon);
  border-color: rgba(111, 191, 155, 0.55);
  background: rgba(111, 191, 155, 0.12);
}

.tag--save {
  color: var(--amber);
  border-color: rgba(224, 164, 88, 0.55);
  background: rgba(224, 164, 88, 0.12);
}

.tag--usage {
  color: var(--mist);
  border-color: rgba(127, 166, 201, 0.55);
  background: rgba(127, 166, 201, 0.12);
}

.checklist { display: grid; gap: 10px; }

.checklist__item {
  position: relative;
  padding-left: 22px;
  font-size: 15px;
  line-height: 1.7;
  color: rgba(242, 235, 221, 0.85);
}

.checklist__item::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 0.66em;
  width: 7px;
  height: 7px;
  background: var(--celadon);
  transform: rotate(45deg);
}

/* ---------- 14. 响应式 ---------- */
@media (max-width: 1180px) {
  .header-coord { display: none; }
}

@media (max-width: 1000px) {
  .nav-toggle { display: inline-flex; margin-left: auto; }

  .site-nav {
    position: absolute;
    top: calc(100% + 12px);
    left: 0;
    right: 0;
    margin: 0;
    padding: 10px;
    border: 1px solid rgba(46, 90, 90, 0.9);
    border-radius: 18px;
    background: linear-gradient(180deg, var(--panel), var(--ink));
    box-shadow: 0 26px 44px -26px #000;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    pointer-events: none;
    transition: opacity 0.2s var(--ease), transform 0.2s var(--ease),
      visibility 0.2s var(--ease);
  }

  .site-nav[data-open] {
    opacity: 1;
    visibility: visible;
    transform: none;
    pointer-events: auto;
  }

  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
  }

  .site-nav__link {
    width: 100%;
    justify-content: flex-start;
    padding: 12px 14px;
    border-radius: 12px;
    font-size: 15px;
  }

  .site-footer__inner { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
  .footer-brand { grid-column: 1 / -1; }

  .split { grid-template-columns: 1fr; }
}

@media (max-width: 820px) {
  .footer-legal {
    grid-template-columns: 1fr;
    gap: 6px;
    align-items: start;
  }
}

@media (max-width: 640px) {
  .header-cta { display: none; }
  .brand__line { display: none; }
  .site-header__inner { min-height: 54px; gap: 8px; }
  .site-footer__inner { grid-template-columns: 1fr; }
  .footer-brand { grid-column: auto; }
  .footer-batch { font-size: 10px; }
}

/* ---------- 15. 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;
  }

  .site-nav { transition: none; }
  .footer-batch__item { opacity: 1; transform: none; }
}