/* =========================================================
   杏悦地址中心 · /assets/site.css
   共享外壳：头部悬浮浮岛 / 页脚索引卡 / 通用组件
   ========================================================= */

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 128px;
}

body { margin: 0; }

h1, h2, h3, h4, h5, p, figure, blockquote, dl, dd { margin: 0; }

ul, ol { margin: 0; padding: 0; list-style: none; }

img, svg, video { display: block; max-width: 100%; height: auto; }

button { font: inherit; color: inherit; }

a { color: inherit; text-decoration: none; }

/* ---------- 变量 ---------- */
:root {
  --pine: #1F3A2E;
  --pine-deep: #14261D;
  --pine-mid: #35594A;
  --amber: #F2B84B;
  --amber-soft: #F8D493;
  --peach: #FDF0D8;
  --paper: #FBF8F2;
  --ink: #262A26;
  --ink-soft: #3C443D;
  --muted: #6E7A72;
  --focus: #2E7D5B;

  --font-display: "Source Han Serif SC", "Noto Serif SC", "Songti SC", "SimSun", serif;
  --font-body: "Source Han Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, "SFMono-Regular", "Menlo", "Courier New", monospace;

  --r-lg: 32px;
  --r-md: 24px;
  --r-sm: 16px;
  --r-pill: 999px;

  --edge: 80px;
  --line: rgba(31, 58, 46, 0.16);
  --line-strong: rgba(31, 58, 46, 0.34);
}

@media (max-width: 1180px) { :root { --edge: 40px; } }
@media (max-width: 720px)  { :root { --edge: 20px; } }

/* ---------- 基座 ---------- */
body {
  min-height: 100vh;
  background-color: var(--paper);
  background-image:
    radial-gradient(circle at 10% -4%, rgba(242, 184, 75, 0.14), transparent 44%),
    radial-gradient(circle at 94% 4%, rgba(253, 240, 216, 0.92), transparent 42%),
    linear-gradient(180deg, #FBF8F2 0%, #FBF8F2 62%, #F7F1E5 100%);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.75;
  letter-spacing: 0.01em;
}

/* 轻微颗粒 */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  opacity: 0.22;
  background-image: radial-gradient(rgba(31, 58, 46, 0.35) 0.5px, transparent 0.5px);
  background-size: 4px 4px;
}

:where(main) {
  display: block;
  position: relative;
  z-index: 2;
  padding-top: 128px;
}

/* ---------- 焦点 / 动效偏好 ---------- */
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible,
[tabindex]:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 3px;
}

::selection { background: var(--amber-soft); color: var(--pine-deep); }

/* ---------- skip link ---------- */
.skip-link {
  position: fixed;
  top: 14px;
  left: 50%;
  z-index: 300;
  transform: translate(-50%, -200%);
  padding: 12px 26px;
  border-radius: var(--r-pill);
  background: var(--pine);
  color: var(--paper);
  font-size: 14px;
  letter-spacing: 0.1em;
  transition: transform 0.18s ease-out;
}
.skip-link:focus,
.skip-link:focus-visible { transform: translate(-50%, 0); }

/* =========================================================
   头部：轻质浮岛
   ========================================================= */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 20px var(--edge) 0;
  pointer-events: none;
  transition: padding-top 0.24s ease-out;
}

.site-header[data-scrolled] { padding-top: 10px; }

.header-inner {
  position: relative;
  max-width: 1440px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 12px;
  pointer-events: auto;
}

/* 品牌签名岛 */
.brand-sig {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 8px 20px 8px 8px;
  border-radius: var(--r-pill);
  background: rgba(251, 248, 242, 0.9);
  -webkit-backdrop-filter: blur(14px) saturate(1.15);
  backdrop-filter: blur(14px) saturate(1.15);
  border: 1px solid var(--line);
  transition: transform 0.18s ease-out, border-color 0.18s ease-out;
}
.brand-sig:hover { transform: translateY(-2px); border-color: var(--line-strong); }

.brand-mark {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: var(--pine);
  color: var(--amber);
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 19px;
  line-height: 1;
}

.brand-text { display: flex; flex-direction: column; line-height: 1.15; }

.brand-name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 17px;
  letter-spacing: 0.02em;
  color: var(--pine);
  white-space: nowrap;
}

.brand-line {
  margin-top: 3px;
  font-size: 11px;
  letter-spacing: 0.22em;
  color: var(--muted);
  white-space: nowrap;
}

/* 移动端按钮 */
.nav-toggle {
  display: none;
  margin-left: auto;
  align-items: center;
  gap: 9px;
  padding: 11px 18px;
  border-radius: var(--r-pill);
  background: rgba(251, 248, 242, 0.92);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  border: 1px solid var(--line);
  color: var(--pine);
  font-size: 13px;
  letter-spacing: 0.14em;
  cursor: pointer;
  transition: border-color 0.18s ease-out, background 0.18s ease-out;
}
.nav-toggle:hover { border-color: var(--line-strong); background: var(--peach); }

.nav-toggle-bars { display: grid; gap: 4px; width: 16px; }
.nav-toggle-bars span {
  display: block;
  height: 2px;
  border-radius: 2px;
  background: var(--pine);
  transition: transform 0.2s ease-out, opacity 0.2s ease-out;
}
.site-header[data-open] .nav-toggle-bars span:nth-child(1) { transform: translateY(3px) rotate(45deg); }
.site-header[data-open] .nav-toggle-bars span:nth-child(2) { transform: translateY(-3px) rotate(-45deg); }

.nav-toggle-label { line-height: 1; }

/* 栏目胶囊岛 */
.nav-capsule {
  display: flex;
  align-items: center;
  margin-inline: auto;
  padding: 6px;
  border-radius: var(--r-pill);
  background: rgba(251, 248, 242, 0.9);
  -webkit-backdrop-filter: blur(14px) saturate(1.15);
  backdrop-filter: blur(14px) saturate(1.15);
  border: 1px solid var(--line);
}

.nav-list { display: flex; align-items: center; gap: 2px; }

.nav-link {
  display: block;
  padding: 9px 16px;
  border-radius: var(--r-pill);
  font-size: 14px;
  letter-spacing: 0.04em;
  color: var(--pine);
  white-space: nowrap;
  transition: background 0.18s ease-out, color 0.18s ease-out;
}
.nav-link:hover { background: var(--peach); color: var(--pine-deep); }
.nav-link[aria-current="page"] {
  background: var(--pine);
  color: var(--amber-soft);
  font-weight: 500;
}

/* 当前章节胶囊 */
.header-chapter {
  display: none;
  flex: 0 0 auto;
  align-items: center;
  gap: 9px;
  padding: 9px 16px;
  border-radius: var(--r-pill);
  background: var(--pine);
  color: rgba(251, 248, 242, 0.9);
  font-size: 12px;
  letter-spacing: 0.16em;
  white-space: nowrap;
}
.site-header[data-condensed] .header-chapter { display: inline-flex; }

.header-chapter-num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 13px;
  color: var(--amber);
}

/* 杏黄咨询胶囊 */
.header-cta {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 13px 24px;
  border-radius: var(--r-pill);
  background: var(--amber);
  color: var(--pine-deep);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.06em;
  white-space: nowrap;
  box-shadow: 0 10px 24px rgba(242, 184, 75, 0.28);
  transition: background 0.18s ease-out, transform 0.18s ease-out, box-shadow 0.18s ease-out;
}
.header-cta::after { content: "→"; font-family: var(--font-mono); font-size: 13px; }
.header-cta:hover {
  background: var(--amber-soft);
  transform: translateY(-2px);
  box-shadow: 0 14px 30px rgba(242, 184, 75, 0.36);
}

/* 进度条 */
.header-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -9px;
  height: 2px;
  border-radius: 2px;
  background: rgba(31, 58, 46, 0.1);
  overflow: hidden;
}
.header-progress-bar {
  display: block;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, var(--amber) 0%, var(--amber-soft) 100%);
  transform: scaleX(0);
  transform-origin: 0 50%;
  transition: transform 0.12s linear;
}

/* ---------- 头部响应式 ---------- */
@media (max-width: 1180px) {
  .nav-link { padding: 9px 12px; font-size: 13px; }
  .header-cta { padding: 11px 18px; font-size: 13px; }
  .header-cta::after { display: none; }
  .site-header[data-condensed] .header-chapter { display: none; }
}

@media (max-width: 960px) {
  .site-header { padding: 14px var(--edge) 0; }
  .brand-line { display: none; }
  .nav-toggle { display: inline-flex; }
  .header-cta { display: none; }

  .nav-capsule {
    position: absolute;
    top: calc(100% + 12px);
    left: 0;
    right: 0;
    margin: 0;
    padding: 10px;
    border-radius: 28px;
    flex-direction: column;
    align-items: stretch;
    background: rgba(251, 248, 242, 0.98);
    box-shadow: 0 20px 48px rgba(20, 38, 29, 0.18);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: opacity 0.22s ease-out, transform 0.22s ease-out, visibility 0.22s;
  }
  .site-header[data-open] .nav-capsule {
    opacity: 1;
    visibility: visible;
    transform: none;
  }

  .nav-list { flex-direction: column; gap: 2px; }
  .nav-link { padding: 14px 18px; font-size: 15px; border-radius: 20px; }

  .header-chapter { display: none !important; }
  .header-progress { bottom: -7px; }
}

@media (max-width: 560px) {
  .brand-sig { padding: 6px 16px 6px 6px; gap: 10px; }
  .brand-mark { width: 34px; height: 34px; font-size: 17px; }
  .brand-name { font-size: 15px; }
  .nav-toggle { padding: 10px 15px; }
  .nav-toggle-label { display: none; }
}

/* =========================================================
   页脚：资料柜背板
   ========================================================= */
.site-footer {
  position: relative;
  z-index: 2;
  margin-top: 120px;
  padding: 0 var(--edge);
  border-radius: 56px 56px 0 0;
  overflow: hidden;
  background:
    radial-gradient(120% 86% at 82% -6%, rgba(53, 89, 74, 0.62), transparent 62%),
    linear-gradient(180deg, #1F3A2E 0%, #14261D 100%);
  color: rgba(251, 248, 242, 0.78);
}

.footer-inner {
  position: relative;
  max-width: 1440px;
  margin: 0 auto;
  padding: 80px 0 34px;
}

.footer-brand {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 20px 32px;
  padding-bottom: 40px;
  margin-bottom: 56px;
  border-bottom: 1px solid rgba(251, 248, 242, 0.14);
}

.footer-sig { display: inline-flex; align-items: center; gap: 14px; }

.footer-mark {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--amber);
  color: var(--pine-deep);
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 21px;
  line-height: 1;
}

.footer-name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 22px;
  letter-spacing: 0.02em;
  color: var(--paper);
}

.footer-tagline {
  font-size: 13px;
  letter-spacing: 0.18em;
  color: rgba(251, 248, 242, 0.52);
}

.footer-cta {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 24px;
  border-radius: var(--r-pill);
  border: 1px solid rgba(242, 184, 75, 0.5);
  color: var(--amber-soft);
  font-size: 13.5px;
  letter-spacing: 0.1em;
  transition: background 0.18s ease-out, color 0.18s ease-out, border-color 0.18s ease-out;
}
.footer-cta:hover {
  background: var(--amber);
  border-color: var(--amber);
  color: var(--pine-deep);
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 48px 32px;
}

.footer-col { min-width: 0; }

.footer-col-title {
  margin-bottom: 18px;
  font-family: var(--font-body);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.24em;
  color: var(--amber-soft);
}

.footer-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(251, 248, 242, 0.62);
}

.footer-link {
  color: rgba(251, 248, 242, 0.84);
  border-bottom: 1px solid transparent;
  transition: color 0.18s ease-out, border-color 0.18s ease-out;
}
.footer-link:hover { color: var(--amber); border-bottom-color: rgba(242, 184, 75, 0.5); }

.footer-meta {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-top: 56px;
  padding-top: 28px;
  border-top: 1px solid rgba(251, 248, 242, 0.14);
}

.footer-note {
  max-width: 66ch;
  font-size: 12.5px;
  line-height: 1.8;
  color: rgba(251, 248, 242, 0.48);
}

.footer-meta-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 28px;
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: rgba(251, 248, 242, 0.52);
}

.footer-copy { letter-spacing: 0.08em; }

.footer-icp {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.06em;
}

@media (max-width: 960px) {
  .site-footer { border-radius: 32px 32px 0 0; }
  .footer-inner { padding-top: 56px; }
  .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 40px 28px; }
  .footer-brand { margin-bottom: 40px; padding-bottom: 28px; }
}

@media (max-width: 560px) {
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-name { font-size: 19px; }
  .footer-meta { margin-top: 40px; }
}

/* =========================================================
   通用排版
   ========================================================= */
.container {
  width: 100%;
  max-width: 1360px;
  margin: 0 auto;
  padding-inline: var(--edge);
}

.section { padding-block: 96px; }
@media (max-width: 960px) { .section { padding-block: 64px; } }

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 40px;
}

.display {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2.6rem, 6vw, 6rem);
  line-height: 1.04;
  letter-spacing: -0.02em;
  color: var(--pine);
}

.section-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.8rem, 3.2vw, 2.6rem);
  line-height: 1.18;
  letter-spacing: -0.015em;
  color: var(--pine);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.24em;
  color: var(--pine-mid);
}
.eyebrow::before {
  content: "";
  width: 28px;
  height: 2px;
  border-radius: 2px;
  background: var(--amber);
}

.lede {
  max-width: 36em;
  font-size: clamp(1.02rem, 1.3vw, 1.16rem);
  line-height: 1.85;
  color: var(--ink-soft);
}

.prose {
  max-width: 38em;
  font-size: 16.5px;
  line-height: 1.85;
  color: var(--ink-soft);
}
.prose p + p { margin-top: 1.1em; }
.prose h2,
.prose h3 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.3;
  color: var(--pine);
  margin: 1.6em 0 0.6em;
}

.rule {
  height: 1px;
  border: 0;
  margin: 0;
  background: linear-gradient(90deg, rgba(31, 58, 46, 0.24), rgba(31, 58, 46, 0));
}

.data-note {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--muted);
}

.stat-value {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(2rem, 5vw, 3.6rem);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--pine);
}

.rot-note {
  writing-mode: vertical-rl;
  font-size: 12px;
  letter-spacing: 0.32em;
  line-height: 1;
  color: var(--muted);
}

/* ---------- 布局骨架 ---------- */
.grid-12 {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: 24px;
}

.stack { display: flex; flex-direction: column; gap: 16px; }

.bento {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: 24px;
}

.bento-item {
  position: relative;
  overflow: hidden;
  padding: 32px;
  border-radius: var(--r-lg);
  border: 1px solid var(--line);
  background: rgba(253, 240, 216, 0.46);
  transition: transform 0.18s ease-out, border-color 0.18s ease-out, background 0.18s ease-out;
}
.bento-item:hover {
  transform: translateY(-4px);
  border-color: var(--line-strong);
  background: rgba(253, 240, 216, 0.72);
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 15px 30px;
  border: 1px solid transparent;
  border-radius: var(--r-pill);
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-align: center;
  cursor: pointer;
  transition: background 0.18s ease-out, color 0.18s ease-out,
              border-color 0.18s ease-out, transform 0.18s ease-out;
}
.btn--primary { background: var(--amber); color: var(--pine-deep); }
.btn--primary:hover { background: var(--amber-soft); transform: translateY(-2px); }

.btn--ghost { background: transparent; color: var(--pine); border-color: var(--line-strong); }
.btn--ghost:hover { background: var(--pine); border-color: var(--pine); color: var(--paper); }

.btn--quiet { background: var(--peach); color: var(--pine); }
.btn--quiet:hover { background: var(--amber-soft); }

/* ---------- 标签 / 编号 ---------- */
.pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: var(--r-pill);
  border: 1px solid var(--line);
  background: var(--peach);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--pine);
}
.pill--amber {
  background: var(--amber);
  border-color: transparent;
  color: var(--pine-deep);
  font-weight: 600;
}

.archive-tag {
  display: inline-block;
  padding-left: 10px;
  border-left: 2px solid var(--amber);
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--pine-mid);
}

.num-badge {
  display: inline-grid;
  place-items: center;
  min-width: 44px;
  padding: 6px 10px;
  border-radius: 14px;
  background: var(--pine);
  color: var(--amber);
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.06em;
  line-height: 1.2;
}

/* ---------- 资料卡 ---------- */
.card {
  position: relative;
  overflow: hidden;
  padding: 28px;
  border-radius: var(--r-md);
  border: 1px solid var(--line);
  background: rgba(253, 240, 216, 0.5);
  transition: transform 0.18s ease-out, border-color 0.18s ease-out, background 0.18s ease-out;
}
.card::after {
  content: "";
  position: absolute;
  left: 28px;
  bottom: 18px;
  width: 0;
  height: 3px;
  border-radius: 3px;
  background: var(--amber);
  transition: width 0.18s ease-out;
}
.card:hover {
  transform: translateY(-4px);
  border-color: var(--line-strong);
  background: rgba(253, 240, 216, 0.82);
}
.card:hover::after { width: calc(100% - 56px); }

/* ---------- 面包屑 ---------- */
.breadcrumb { padding-block: 22px; }

.breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--muted);
}
.breadcrumb-list li { display: inline-flex; align-items: center; gap: 8px; }
.breadcrumb-list li + li::before {
  content: "/";
  color: rgba(31, 58, 46, 0.28);
}
.breadcrumb-list a {
  color: var(--pine-mid);
  border-bottom: 1px solid transparent;
  transition: color 0.18s ease-out, border-color 0.18s ease-out;
}
.breadcrumb-list a:hover { color: var(--pine); border-bottom-color: var(--amber); }

/* ---------- 提示块 ---------- */
.callout {
  display: flex;
  gap: 16px;
  padding: 24px 28px;
  border-radius: var(--r-md);
  border: 1px solid rgba(242, 184, 75, 0.44);
  background: rgba(242, 184, 75, 0.16);
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-soft);
}

/* ---------- 图片容器基础 ---------- */
.media-frame {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 10;
  border-radius: var(--r-md);
  border: 1px solid rgba(31, 58, 46, 0.12);
  background: linear-gradient(150deg, #FDF0D8 0%, #F3E3C6 58%, #E7D5B5 100%);
}
.media-frame > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.94) contrast(1.02);
}
.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.5;
  mix-blend-mode: multiply;
  background-image: radial-gradient(rgba(31, 58, 46, 0.32) 0.5px, transparent 0.5px);
  background-size: 4px 4px;
}
.media-frame--tall { aspect-ratio: 3 / 4; }
.media-frame--square { aspect-ratio: 1 / 1; }

/* =========================================================
   动效偏好
   ========================================================= */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .brand-sig:hover,
  .header-cta:hover,
  .btn:hover,
  .card:hover,
  .bento-item:hover { transform: none; }

  .card:hover::after { width: 0; }
}