/* =========================================================
   易游指南 · 共享站点样式 / assets/site.css
   暖纸底 + 细网格 + 深墨字 + 湖蓝结构线 + 琥珀行动点
   ========================================================= */

:root {
  --paper: #F7F3EA;
  --paper-deep: #EFE8D9;
  --ink: #1F2A2E;
  --ink-soft: #44555B;
  --lake: #3F7C8C;
  --mist: #A9C3CC;
  --orange: #F2A65A;
  --amber: #E58A2B;
  --amber-deep: #C9711A;
  --amber-ink: #8A4A00;
  --grid: #D9D2C3;
  --teal-gray: #6B8E8A;
  --card: #FFFFFF;
  --deep-teal: #24515A;

  --font-head: "Yuanti SC", "YouYuan", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-body: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --font-mono: "SFMono-Regular", "Menlo", "Consolas", "Liberation Mono", "Courier New", monospace;

  --page-max: 1180px;
  --gutter: clamp(16px, 4vw, 40px);
  --line: 1px solid var(--grid);
  --line-ink: 1px solid var(--ink);
  --dur: 220ms;
  --ease: cubic-bezier(.32, .72, .32, 1);
}

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

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background-color: var(--paper);
  background-image:
    linear-gradient(to right, rgba(107, 142, 138, .07) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(107, 142, 138, .05) 1px, transparent 1px);
  background-size: 72px 72px;
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.75;
  font-feature-settings: "kern" 1;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-head);
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: .01em;
  margin: 0 0 .5em;
  color: var(--ink);
}

h1 { font-size: clamp(30px, 4.4vw, 52px); }
h2 { font-size: clamp(23px, 3vw, 34px); }
h3 { font-size: clamp(18px, 2vw, 24px); }
h4 { font-size: 17px; }

p { margin: 0 0 1em; }

a { color: var(--lake); text-decoration-color: rgba(63, 124, 140, .45); text-underline-offset: 3px; }
a:hover { color: var(--deep-teal); }

img { max-width: 100%; height: auto; }

ul, ol { margin: 0 0 1em; padding-left: 1.2em; }

button { font-family: inherit; }

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

/* ---------- skip link ---------- */
.skip-link {
  position: absolute;
  left: 14px;
  top: -80px;
  z-index: 120;
  display: inline-block;
  padding: 10px 20px;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 15px;
  text-decoration: none;
  border-radius: 0 0 4px 4px;
  transition: top var(--dur) var(--ease);
}

.skip-link:focus {
  top: 0;
  color: var(--paper);
}

/* ---------- 通用标签 / 按钮 ---------- */
.mono-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.5;
  letter-spacing: .06em;
  padding: 3px 8px;
  border: 1px solid var(--grid);
  border-radius: var(--radius-tag, 3px);
  background: var(--card);
  color: var(--ink-soft);
  white-space: nowrap;
}

.mono-tag--lake {
  color: var(--lake);
  border-color: var(--mist);
  background: rgba(169, 195, 204, .22);
}

.mono-tag--amber {
  color: var(--amber-ink);
  border-color: var(--orange);
  background: rgba(242, 166, 90, .26);
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 20px;
  border: 1px solid var(--ink);
  border-radius: 2px;
  background: var(--card);
  color: var(--ink);
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 15px;
  line-height: 1.2;
  text-decoration: none;
  cursor: pointer;
  transition: background-color var(--dur) var(--ease),
              color var(--dur) var(--ease),
              border-color var(--dur) var(--ease),
              transform var(--dur) var(--ease);
}

.btn::after {
  content: "";
  width: 7px;
  height: 7px;
  border-top: 1.6px solid currentColor;
  border-right: 1.6px solid currentColor;
  transform: rotate(45deg);
  transition: transform var(--dur) var(--ease);
}

.btn:hover {
  background: var(--paper-deep);
  color: var(--ink);
}

.btn:hover::after {
  transform: rotate(45deg) translate(2px, -2px);
}

.btn--primary {
  background: var(--amber);
  border-color: var(--amber);
  color: var(--ink);
}

.btn--primary:hover {
  background: var(--amber-deep);
  border-color: var(--amber-deep);
  color: var(--ink);
}

.btn--ghost {
  background: transparent;
  border-color: var(--lake);
  color: var(--lake);
}

.btn--ghost:hover {
  background: rgba(63, 124, 140, .1);
  color: var(--deep-teal);
}

.btn--sm {
  padding: 9px 15px;
  font-size: 13.5px;
}

/* ---------- 页头：居中刊头 ---------- */
.site-header {
  position: relative;
  z-index: 20;
  background: var(--paper);
  border-bottom: var(--line-ink);
  box-shadow: 0 14px 28px -26px rgba(31, 42, 46, .9);
}

.header-rail {
  width: 100%;
  max-width: var(--page-max);
  margin: 0 auto;
  padding: 20px var(--gutter) 16px;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 16px;
}

.header-rail__meta {
  justify-self: start;
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0;
  min-width: 0;
}

.header-rail__dot {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--orange);
  flex: 0 0 auto;
}

.header-rail__brand {
  grid-column: 2;
  justify-self: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1px;
  padding: 7px 20px 5px;
  border-top: 2px solid var(--ink);
  border-bottom: var(--line);
  color: var(--ink);
  text-decoration: none;
}

.header-rail__brand:hover { color: var(--deep-teal); }

.header-rail__brand-name {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(24px, 3.4vw, 36px);
  line-height: 1.1;
  letter-spacing: .1em;
  white-space: nowrap;
}

.header-rail__brand-tag {
  font-size: 12.5px;
  letter-spacing: .34em;
  color: var(--teal-gray);
  white-space: nowrap;
}

.header-rail__actions {
  justify-self: end;
  display: flex;
  align-items: center;
  gap: 10px;
}

/* 移动路径按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 8px;
  padding: 8px 13px;
  border: 1px solid var(--ink);
  border-radius: 999px;
  background: var(--card);
  color: var(--ink);
  font-family: var(--font-head);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .08em;
  cursor: pointer;
}

.nav-toggle__bars {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 3px;
  width: 15px;
}

.nav-toggle__bars span {
  display: block;
  height: 2px;
  background: var(--ink);
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}

.site-header[data-open="true"] .nav-toggle__bars span:nth-child(1) {
  transform: translateY(5px) rotate(45deg);
}

.site-header[data-open="true"] .nav-toggle__bars span:nth-child(2) {
  opacity: 0;
}

.site-header[data-open="true"] .nav-toggle__bars span:nth-child(3) {
  transform: translateY(-5px) rotate(-45deg);
}

/* 横向路径条 */
.pathnav {
  border-top: var(--line);
  background: linear-gradient(180deg, rgba(239, 232, 217, .55), rgba(247, 243, 234, 0));
}

.pathnav__list {
  width: 100%;
  max-width: var(--page-max);
  margin: 0 auto;
  padding: 0 var(--gutter);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  list-style: none;
}

.pathnav__item {
  display: flex;
  align-items: center;
}

.pathnav__item + .pathnav__item::before {
  content: "";
  width: 20px;
  height: 1px;
  background: var(--grid);
  margin: 0 2px;
  flex: 0 0 auto;
}

.pathnav__link {
  position: relative;
  display: block;
  padding: 14px 10px 12px;
  border-bottom: 3px solid transparent;
  color: var(--ink);
  font-family: var(--font-head);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .04em;
  text-decoration: none;
  white-space: nowrap;
  transition: color var(--dur) var(--ease),
              border-color var(--dur) var(--ease),
              background-color var(--dur) var(--ease);
}

.pathnav__link:hover {
  color: var(--deep-teal);
  background: rgba(242, 166, 90, .14);
}

.pathnav__link[aria-current="page"] {
  color: var(--deep-teal);
  border-bottom-color: var(--amber);
}

/* ---------- 页脚 ---------- */
.site-footer {
  margin-top: 64px;
  background: var(--deep-teal);
  color: #F4EFE3;
  border-top: 4px solid var(--amber);
}

.site-footer a { color: #F4EFE3; }

.site-footer .mono-tag {
  background: rgba(247, 243, 234, .1);
  border-color: rgba(247, 243, 234, .28);
  color: #F4EFE3;
}

.site-footer .mono-tag--amber {
  background: rgba(242, 166, 90, .16);
  border-color: rgba(242, 166, 90, .55);
  color: var(--orange);
}

.footer-rail {
  width: 100%;
  max-width: var(--page-max);
  margin: 0 auto;
  padding: 46px var(--gutter) 26px;
}

.footer-top {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.15fr);
  gap: 30px 56px;
  align-items: start;
}

.footer-brand__mark {
  margin: 0 0 6px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(24px, 3vw, 32px);
  letter-spacing: .14em;
  line-height: 1.15;
  color: #F7F3EA;
}

.footer-brand__line {
  margin: 0 0 6px;
  font-size: 15px;
  color: var(--orange);
  letter-spacing: .04em;
}

.footer-brand__note {
  margin: 0;
  max-width: 34ch;
  font-size: 13.5px;
  line-height: 1.7;
  color: rgba(247, 243, 234, .62);
}

.footer-contact { margin: 0; }

.footer-contact__row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 16px;
  margin: 0;
  padding: 10px 0;
  border-top: 1px solid rgba(247, 243, 234, .16);
}

.footer-contact__row:first-child { border-top: 1px solid rgba(247, 243, 234, .3); }

.footer-contact__label {
  flex: 0 0 76px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: rgba(247, 243, 234, .58);
}

.footer-contact__value {
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: .01em;
  color: #F7F3EA;
  word-break: break-word;
}

/* 资源折叠抽屉 */
.footer-drawer {
  margin-top: 34px;
  border-top: 1px solid rgba(247, 243, 234, .3);
  border-bottom: 1px solid rgba(247, 243, 234, .3);
}

.footer-drawer__toggle {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 2px;
  background: none;
  border: 0;
  color: #F7F3EA;
  font-family: var(--font-head);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: .1em;
  text-align: left;
  cursor: pointer;
}

.footer-drawer__toggle:hover { color: var(--orange); }

.footer-drawer__hint {
  margin-left: 2px;
  font-weight: 400;
}

.footer-drawer__chevron {
  width: 9px;
  height: 9px;
  margin-left: auto;
  border-right: 2px solid var(--orange);
  border-bottom: 2px solid var(--orange);
  transform: rotate(45deg) translateY(-2px);
  transition: transform var(--dur) var(--ease);
  flex: 0 0 auto;
}

.footer-drawer[data-open="true"] .footer-drawer__chevron {
  transform: rotate(-135deg) translateY(-2px);
}

.footer-drawer__panel {
  overflow: hidden;
  max-height: 0;
  opacity: 0;
  visibility: hidden;
  transition: max-height 240ms var(--ease),
              opacity 200ms var(--ease),
              visibility 0s linear 240ms;
}

.footer-drawer[data-open="true"] .footer-drawer__panel {
  max-height: 400px;
  opacity: 1;
  visibility: visible;
  transition: max-height 240ms var(--ease),
              opacity 200ms var(--ease),
              visibility 0s linear 0s;
}

.resource-list {
  list-style: none;
  margin: 0;
  padding: 0 0 14px;
}

.resource-list__item {
  border-top: 1px dashed rgba(247, 243, 234, .2);
}

.resource-list__item:first-child { border-top: 0; }

.resource-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 13px 4px;
  font-size: 15px;
  text-decoration: none;
  transition: color var(--dur) var(--ease), padding-left var(--dur) var(--ease);
}

.resource-link::before {
  content: "\21B3";
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--orange);
  flex: 0 0 auto;
}

.resource-link:hover {
  color: var(--orange);
  padding-left: 10px;
}

/* 底部法律区 */
.footer-base {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 30px;
  padding: 20px 0 6px;
}

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 22px;
}

.footer-legal__link {
  position: relative;
  font-size: 14px;
  text-decoration: none;
  padding-bottom: 2px;
  border-bottom: 1px solid rgba(247, 243, 234, .28);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.footer-legal__link:hover {
  color: var(--orange);
  border-bottom-color: var(--orange);
}

.footer-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 4px 10px;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: rgba(247, 243, 234, .68);
}

.footer-meta__icp { letter-spacing: .04em; }
.footer-meta__sep { color: rgba(247, 243, 234, .35); }

/* ---------- 通用版式与组件 ---------- */
.page-shell {
  width: 100%;
  max-width: var(--page-max);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.grid-12 {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: var(--gutter);
}

.prose {
  max-width: 68ch;
}

.prose p { margin: 0 0 1.1em; }

.chapter {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin: 0 0 14px;
  padding-bottom: 10px;
  border-bottom: var(--line);
}

.chapter__num {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .08em;
  padding: 2px 8px;
  border: 1px solid var(--mist);
  border-radius: var(--radius-tag, 3px);
  background: rgba(169, 195, 204, .2);
  color: var(--lake);
}

.chapter__name {
  margin: 0;
  font-family: var(--font-head);
  font-size: clamp(18px, 2vw, 23px);
  font-weight: 800;
  color: var(--ink);
}

.card {
  position: relative;
  background: var(--card);
  border: var(--line);
  border-radius: 2px;
  padding: 22px;
  box-shadow: 0 12px 30px -26px rgba(31, 42, 46, .75);
}

.card--offset { margin-top: -18px; }

.breadcrumb {
  border-bottom: var(--line);
  padding: 16px 0 14px;
}

.breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .04em;
}

.breadcrumb__item {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--teal-gray);
}

.breadcrumb__item + .breadcrumb__item::before {
  content: "/";
  color: var(--grid);
}

.breadcrumb__link {
  color: var(--lake);
  text-decoration: none;
}

.breadcrumb__link:hover {
  color: var(--deep-teal);
  text-decoration: underline;
}

.breadcrumb__item[aria-current="page"] { color: var(--ink); }

/* 图片容器基础规则（页面阶段放图用） */
.img-frame {
  position: relative;
  display: block;
  width: 100%;
  overflow: hidden;
  aspect-ratio: 16 / 10;
  background: var(--paper-deep);
  border: var(--line);
  border-radius: 2px;
}

.img-frame > img,
.img-frame > picture > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.img-frame--wide { aspect-ratio: 21 / 9; }
.img-frame--tall { aspect-ratio: 4 / 5; }
.img-frame--square { aspect-ratio: 1 / 1; }

.img-frame--empty::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(135deg,
      rgba(63, 124, 140, .14) 25%, transparent 25%,
      transparent 50%, rgba(63, 124, 140, .14) 50%,
      rgba(63, 124, 140, .14) 75%, transparent 75%);
  background-size: 22px 22px;
}

.img-caption {
  margin: 8px 0 0;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .03em;
  color: var(--teal-gray);
}

/* 滚动进度条（由 JS 注入） */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 0;
  height: 3px;
  z-index: 80;
  pointer-events: none;
  background: linear-gradient(90deg, var(--lake), var(--orange) 70%, var(--amber));
}

/* ---------- 平板 ---------- */
@media (max-width: 900px) {
  .header-rail {
    padding: 14px var(--gutter) 12px;
    gap: 10px;
  }

  .header-rail__meta { display: none; }
  .header-rail__actions .btn { display: none; }
  .nav-toggle { display: inline-flex; }

  .header-rail__brand {
    padding: 5px 12px 4px;
    border-top-width: 1.6px;
  }

  .header-rail__brand-name { font-size: 25px; letter-spacing: .08em; }
  .header-rail__brand-tag { font-size: 11px; letter-spacing: .26em; }

  .pathnav {
    display: block;
    max-height: 0;
    overflow: hidden;
    transition: max-height 260ms var(--ease);
  }

  .site-header[data-open="true"] .pathnav {
    max-height: 480px;
  }

  .pathnav__list {
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    padding: 4px var(--gutter) 16px;
  }

  .pathnav__item + .pathnav__item::before { display: none; }

  .pathnav__item { border-top: var(--line); }
  .pathnav__item:first-child { border-top: 0; }

  .pathnav__link {
    padding: 13px 12px;
    border-bottom: 0;
    border-left: 3px solid transparent;
    font-size: 15.5px;
  }

  .pathnav__link[aria-current="page"] {
    border-bottom-color: transparent;
    border-left-color: var(--amber);
    background: rgba(242, 166, 90, .14);
  }

  .footer-top { grid-template-columns: minmax(0, 1fr); }
  .footer-contact__label { flex-basis: 68px; }

  .grid-12 { grid-template-columns: repeat(6, minmax(0, 1fr)); }

  .card--offset { margin-top: 0; }
}

/* ---------- 手机 ---------- */
@media (max-width: 600px) {
  body { font-size: 16px; line-height: 1.72; }

  .header-rail { padding: 12px var(--gutter) 10px; }
  .header-rail__brand-name { font-size: 22px; }
  .header-rail__brand-tag { font-size: 10.5px; letter-spacing: .22em; }
  .nav-toggle { padding: 7px 11px; font-size: 12px; }

  .footer-rail { padding: 34px var(--gutter) 20px; }
  .footer-brand__line { font-size: 14px; }
  .footer-contact__label { flex-basis: 100%; }
  .footer-base { flex-direction: column; align-items: flex-start; gap: 14px; }
  .footer-meta { font-size: 11.5px; }

  .grid-12 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .card { padding: 18px; }
}

/* ---------- 尊重减少动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
    transition-delay: 0s !important;
    scroll-behavior: auto !important;
  }

  .pathnav,
  .footer-drawer__panel {
    transition: none !important;
  }
}