/* ============================================================
   金年汇官网 · 共享样式表 /assets/site.css
   金线穿深蓝 —— 粗边框、硬阴影、非对称编辑部节奏
   ============================================================ */

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 150px;
}

body, h1, h2, h3, h4, h5, h6, p, ul, ol, li, figure, blockquote, dl, dd {
  margin: 0;
  padding: 0;
}

ul, ol { list-style: none; }
img, svg, video, canvas { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; color: inherit; }
button { background: none; border: 0; padding: 0; cursor: pointer; }
table { border-collapse: collapse; width: 100%; }
summary { cursor: pointer; }
summary::-webkit-details-marker { display: none; }
[hidden] { display: none !important; }

/* ---------- 2. 设计令牌 ---------- */
:root {
  /* 色彩 */
  --ink-navy: #0B1A2E;
  --ink-navy-2: #132B4A;
  --gold: #E8B54A;
  --gold-light: #FFDE9B;
  --coral: #D9502B;
  --celadon: #257066;
  --indigo: #42397A;
  --wine: #7A2436;
  --paper: #F7F2E7;
  --text-ink: #14171C;
  --mist: #9AA6B8;

  --paper-70: rgba(247, 242, 231, 0.72);
  --paper-90: rgba(247, 242, 231, 0.9);
  --line-soft: rgba(154, 166, 184, 0.22);
  --gold-soft: rgba(232, 181, 74, 0.35);
  --ink-shadow: rgba(11, 26, 46, 0.92);

  /* 字体 */
  --font-display: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-body: var(--font-display);
  --font-serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", STSong, "SimSun", Georgia, "Times New Roman", serif;
  --font-mono: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, Consolas, "Liberation Mono", monospace;

  /* 尺度 */
  --wrap-max: 1240px;
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  --bw: 2px;
  --shadow-hard: 6px 6px 0 var(--ink-shadow);
  --section-space: clamp(56px, 8vw, 120px);
}

/* ---------- 3. 基础排版 ---------- */
body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.85;
  font-weight: 400;
  color: var(--text-ink);
  background: var(--paper);
  min-height: 100vh;
  overflow-x: hidden;
}

@media (min-width: 768px) {
  body { font-size: 17px; }
}

h1, .h1 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(28px, 5.2vw, 56px);
  line-height: 1.12;
  letter-spacing: -0.02em;
}

h2, .h2 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(24px, 3.4vw, 38px);
  line-height: 1.18;
  letter-spacing: -0.02em;
}

h3, .h3 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(19px, 2vw, 25px);
  line-height: 1.3;
  letter-spacing: -0.01em;
}

h4, .h4 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 18px;
  line-height: 1.4;
}

.serif { font-family: var(--font-serif); font-weight: 600; }

.num,
.stat-bar__value,
.path-strip__num {
  font-family: var(--font-mono);
  font-weight: 800;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.02em;
}

.lede {
  font-size: clamp(17px, 1.6vw, 21px);
  line-height: 1.8;
  max-width: 32em;
}

.section__lead { opacity: 0.86; }

.label {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--mist);
}

.label--gold { color: var(--gold); }

/* ---------- 4. 焦点与可访问性 ---------- */
:focus-visible {
  outline: 3px solid var(--gold-light);
  outline-offset: 3px;
}

.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  margin: -1px; padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  left: 16px;
  top: -140px;
  z-index: 200;
  padding: 12px 22px;
  background: var(--gold);
  color: var(--ink-navy);
  font-weight: 800;
  font-size: 15px;
  letter-spacing: 0.04em;
  border: var(--bw) solid var(--ink-navy);
  transition: top 0.18s var(--ease);
}

.skip-link:focus { top: 16px; }

/* ---------- 5. 布局容器 ---------- */
.wrap {
  width: 100%;
  max-width: var(--wrap-max);
  margin-inline: auto;
  padding-inline: clamp(18px, 4vw, 40px);
}

.section {
  padding-block: var(--section-space);
  position: relative;
}

.section--flush-top { padding-top: 0; }
.section--flush-bottom { padding-bottom: 0; }

.section--ink { background: var(--ink-navy); color: var(--paper); }
.section--paper { background: var(--paper); color: var(--text-ink); }
.section--indigo { background: var(--indigo); color: var(--paper); }
.section--wine { background: var(--wine); color: var(--paper); }

.section--narrow > .wrap { max-width: 820px; }

.section__head {
  max-width: 820px;
  margin-bottom: clamp(28px, 4vw, 56px);
}

.section__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(26px, 3.6vw, 42px);
  line-height: 1.15;
  letter-spacing: -0.02em;
}

.section__lead {
  margin-top: 14px;
  font-size: 17px;
  line-height: 1.85;
  max-width: 34em;
}

.rule-gold {
  height: 2px;
  border: 0;
  margin-block: clamp(32px, 5vw, 64px);
  background: linear-gradient(90deg, var(--gold), rgba(232, 181, 74, 0.06));
}

.texture-dots {
  background-image: radial-gradient(rgba(20, 23, 28, 0.06) 1px, transparent 1px);
  background-size: 22px 22px;
  background-position: 0 0;
}

/* ---------- 6. 非对称 12 栏 ---------- */
.grid-12 {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: clamp(16px, 2.4vw, 32px);
}

.grid-12 > * { grid-column: 1 / -1; }

@media (min-width: 900px) {
  .col-main { grid-column: 1 / span 7; }
  .col-note { grid-column: 9 / span 3; }
  .col-flip-main { grid-column: 6 / span 7; }
  .col-flip-note { grid-column: 1 / span 3; }
  .col-full { grid-column: 1 / -1; }
  .col-half { grid-column: span 6; }
}

/* ---------- 7. 页头 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 90;
  background: var(--ink-navy);
  color: var(--paper);
  border-bottom: 1px solid var(--gold-soft);
}

.progress-rail {
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: rgba(154, 166, 184, 0.18);
  z-index: 2;
}

.progress-rail__fill {
  display: block;
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--gold), var(--gold-light));
}

.site-nav { position: relative; z-index: 1; }

.site-nav__upper {
  display: flex;
  align-items: center;
  gap: 24px;
  padding-block: 13px;
  border-bottom: 1px solid var(--line-soft);
}

.site-nav__utility {
  display: flex;
  align-items: center;
  gap: 22px;
  margin-left: auto;
}

.site-nav__utility a {
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--mist);
  transition: color 0.18s var(--ease);
}

.site-nav__utility a:hover { color: var(--gold-light); }

.site-nav__tools {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-left: 26px;
}

.tool-link {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  padding: 8px 13px;
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--paper);
  border: 1px solid rgba(154, 166, 184, 0.38);
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.tool-link:hover { color: var(--gold); border-color: var(--gold); }

/* 品牌 */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--paper);
}

.brand__mark {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  flex: 0 0 auto;
  border: var(--bw) solid var(--gold);
  color: var(--gold);
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 20px;
  line-height: 1;
  box-shadow: 3px 3px 0 rgba(232, 181, 74, 0.28);
}

.brand__text { display: block; }

.brand__name {
  display: block;
  font-size: 20px;
  font-weight: 900;
  letter-spacing: 0.04em;
  line-height: 1.2;
}

.brand__motto {
  display: block;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--mist);
  line-height: 1.5;
}

.brand--footer { margin-bottom: 4px; }
.brand--footer .brand__mark { width: 34px; height: 34px; font-size: 18px; }
.brand--footer .brand__name { font-size: 19px; }

/* 下层栏目条 */
.site-nav__lower {
  position: relative;
  display: flex;
  align-items: center;
  gap: 20px;
}

.site-nav__list {
  display: flex;
  align-items: center;
  gap: 4px;
}

.site-nav__list a {
  position: relative;
  display: inline-block;
  padding: 15px 14px;
  font-size: 17px;
  font-weight: 700;
  color: var(--paper-70);
  transition: color 0.18s var(--ease);
}

.site-nav__list a::after {
  content: "";
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 8px;
  height: 3px;
  background: var(--gold);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.18s var(--ease);
}

.site-nav__list a:hover { color: var(--gold-light); }
.site-nav__list a:hover::after { transform: scaleX(1); }

.site-nav__list a[aria-current="page"] { color: var(--gold); }
.site-nav__list a[aria-current="page"]::after { transform: scaleX(1); }

.site-nav__label {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: rgba(154, 166, 184, 0.72);
}

/* 移动菜单按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  min-height: 40px;
  padding: 8px 14px;
  border: var(--bw) solid var(--gold);
  color: var(--gold);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.16em;
  transition: background 0.18s var(--ease), color 0.18s var(--ease);
}

.nav-toggle:hover { background: var(--gold); color: var(--ink-navy); }

.nav-toggle__bars {
  display: grid;
  gap: 3px;
  width: 16px;
}

.nav-toggle__bars i {
  display: block;
  height: 2px;
  background: currentColor;
}

/* ---------- 8. 页脚 ---------- */
.site-footer {
  position: relative;
  background: var(--ink-navy);
  color: var(--paper-70);
  border-top: 3px solid var(--gold);
  padding-top: clamp(48px, 7vw, 88px);
}

.footer-grid {
  display: grid;
  gap: clamp(28px, 3.4vw, 52px);
  grid-template-columns: minmax(200px, 1.6fr) repeat(3, minmax(130px, 1fr)) minmax(220px, 1.6fr);
  padding-bottom: clamp(40px, 5vw, 72px);
}

.footer-brand__line {
  margin-top: 16px;
  max-width: 22em;
  font-size: 14px;
  line-height: 1.85;
  color: var(--mist);
}

.footer-group__title,
.footer-contact__title {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 15px;
  letter-spacing: 0.08em;
  color: var(--gold);
  margin-bottom: 14px;
}

.footer-group__list li + li { margin-top: 2px; }

.footer-group__list a {
  display: inline-block;
  padding-block: 5px;
  font-size: 15px;
  color: var(--paper-70);
  transition: color 0.18s var(--ease), transform 0.18s var(--ease);
}

.footer-group__list a:hover {
  color: var(--gold);
  transform: translateX(3px);
}

.footer-contact__list li {
  display: grid;
  gap: 2px;
  padding-block: 10px;
  border-bottom: 1px solid var(--line-soft);
}

.footer-contact__list li:first-child { padding-top: 0; }

.footer-contact__label {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--mist);
}

.footer-contact__value {
  font-size: 15px;
  line-height: 1.7;
  color: var(--paper-90);
  word-break: break-word;
}

.footer-legal {
  background: rgba(0, 0, 0, 0.2);
  border-top: 1px solid var(--line-soft);
}

.footer-legal__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 28px;
  padding-block: 18px;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--mist);
}

.footer-legal__links {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  margin-left: auto;
}

.footer-legal__links a { transition: color 0.18s var(--ease); }
.footer-legal__links a:hover { color: var(--gold); }

/* ---------- 9. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 44px;
  padding: 12px 22px;
  border: var(--bw) solid var(--gold);
  background: transparent;
  color: var(--gold);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-align: center;
  transition: background 0.18s var(--ease), color 0.18s var(--ease),
              border-color 0.18s var(--ease), transform 0.18s var(--ease),
              box-shadow 0.18s var(--ease);
}

.btn:hover { background: var(--gold); color: var(--ink-navy); }

.btn--gold {
  background: var(--gold);
  border-color: var(--gold);
  color: var(--ink-navy);
  box-shadow: 4px 4px 0 var(--ink-shadow);
}

.btn--gold:hover {
  background: var(--gold-light);
  border-color: var(--gold-light);
  color: var(--ink-navy);
}

.btn--coral {
  background: var(--coral);
  border-color: var(--coral);
  color: #FFFFFF;
  box-shadow: 4px 4px 0 var(--ink-shadow);
}

.btn--coral:hover { background: #B8401F; border-color: #B8401F; color: #FFFFFF; }

.btn--celadon {
  background: var(--celadon);
  border-color: var(--celadon);
  color: #FFFFFF;
  box-shadow: 4px 4px 0 var(--ink-shadow);
}

.btn--celadon:hover { background: #1B544C; border-color: #1B544C; color: #FFFFFF; }

.btn--sm {
  min-height: 36px;
  padding: 8px 14px;
  font-size: 13px;
  letter-spacing: 0.08em;
}

.btn--block { width: 100%; }

.btn:active {
  transform: translate(2px, 2px);
  box-shadow: none;
}

/* ---------- 10. 标签、筛选片 ---------- */
.tag {
  display: inline-block;
  padding: 4px 10px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.14em;
  line-height: 1.6;
  color: #FFFFFF;
}

.tag--coral { background: var(--coral); }
.tag--celadon { background: var(--celadon); }
.tag--gold { background: var(--gold); color: var(--ink-navy); }

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 36px;
  padding: 6px 14px;
  border: var(--bw) solid rgba(154, 166, 184, 0.42);
  background: transparent;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: inherit;
  transition: background 0.18s var(--ease), color 0.18s var(--ease),
              border-color 0.18s var(--ease);
}

.chip:hover { border-color: var(--gold); color: var(--gold); }

.chip[aria-pressed="true"],
.chip.is-active {
  background: var(--gold);
  border-color: var(--gold);
  color: var(--ink-navy);
}

/* ---------- 11. 卡片 ---------- */
.card {
  background: var(--paper);
  color: var(--text-ink);
  border: var(--bw) solid var(--ink-navy);
  box-shadow: var(--shadow-hard);
  padding: clamp(18px, 2.2vw, 28px);
}

.card--ink {
  background: var(--ink-navy-2);
  color: var(--paper);
  border-color: var(--gold);
  box-shadow: 6px 6px 0 rgba(0, 0, 0, 0.45);
}

.card--gold {
  background: var(--gold);
  color: var(--ink-navy);
  border-color: var(--ink-navy);
  box-shadow: 6px 6px 0 var(--ink-shadow);
}

.card__head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 14px;
}

.card__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 20px;
  line-height: 1.35;
  letter-spacing: -0.01em;
}

.card__body { font-size: 15px; line-height: 1.8; }

/* ---------- 12. 面包屑与正文 ---------- */
.breadcrumb {
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--mist);
}

.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 4px;
}

.breadcrumb li { display: inline-flex; align-items: center; }

.breadcrumb li + li::before {
  content: "/";
  margin-right: 8px;
  color: rgba(154, 166, 184, 0.6);
}

.breadcrumb a { transition: color 0.18s var(--ease); }
.breadcrumb a:hover { color: var(--gold); }

.prose {
  max-width: 34em;
  font-size: 17px;
  line-height: 1.85;
  color: var(--text-ink);
}

.prose p + p { margin-top: 1.2em; }

.prose h2 { margin-top: 2em; margin-bottom: 0.6em; }
.prose h3 { margin-top: 1.6em; margin-bottom: 0.5em; }

.prose ul, .prose ol {
  margin-top: 1em;
  padding-left: 1.2em;
  list-style: disc;
}

.prose ol { list-style: decimal; }
.prose li + li { margin-top: 0.5em; }

.prose--on-ink { color: var(--paper-70); }
.prose--on-ink h2, .prose--on-ink h3, .prose--on-ink strong { color: var(--paper); }

/* ---------- 13. 三步路径条 ---------- */
.path-strip {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border: var(--bw) solid var(--gold);
  background: rgba(19, 43, 74, 0.72);
}

.path-strip__step {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 18px 22px;
  color: var(--paper);
  border-right: var(--bw) solid var(--gold-soft);
  transition: background 0.18s var(--ease);
}

.path-strip__step:last-child { border-right: 0; }
.path-strip__step:hover { background: rgba(232, 181, 74, 0.14); }

.path-strip__num {
  font-size: 1.6em;
  color: var(--gold);
  line-height: 1;
}

.path-strip__label { font-weight: 800; font-size: 17px; line-height: 1.4; }

.path-strip__hint {
  display: block;
  font-size: 13px;
  font-weight: 400;
  color: var(--mist);
  line-height: 1.6;
}

/* ---------- 14. 时间轴 ---------- */
.timeline {
  position: relative;
  padding-left: 34px;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 9px;
  top: 6px;
  bottom: 6px;
  width: 2px;
  background: linear-gradient(180deg, var(--gold), rgba(232, 181, 74, 0.12));
}

.timeline__item {
  position: relative;
  padding-bottom: 32px;
}

.timeline__item:last-child { padding-bottom: 0; }

.timeline__item::before {
  content: "";
  position: absolute;
  left: -34px;
  top: 7px;
  width: 20px;
  height: 20px;
  border: 3px solid var(--gold);
  background: var(--ink-navy);
}

.timeline__item--wine::before { border-color: var(--wine); }
.timeline__item--celadon::before { border-color: var(--celadon); }

.timeline__meta {
  display: block;
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--mist);
}

.timeline__title {
  margin-top: 4px;
  font-size: 19px;
  font-weight: 800;
  line-height: 1.4;
}

/* ---------- 15. 数据条 ---------- */
.stat-bar {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  border: 3px solid var(--ink-navy);
  background: var(--paper);
}

.stat-bar__item {
  padding: clamp(18px, 2.4vw, 30px);
  border-right: 3px solid var(--ink-navy);
}

.stat-bar__item:last-child { border-right: 0; }

.stat-bar__value {
  font-size: clamp(28px, 4vw, 44px);
  line-height: 1.1;
  color: var(--ink-navy);
}

.stat-bar__label {
  display: block;
  margin-top: 6px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: rgba(20, 23, 28, 0.66);
}

.stat-bar--ink { background: var(--ink-navy-2); border-color: var(--gold); }
.stat-bar--ink .stat-bar__item { border-color: var(--gold); }
.stat-bar--ink .stat-bar__value { color: var(--gold); }
.stat-bar--ink .stat-bar__label { color: var(--mist); }

/* ---------- 16. 手风琴 ---------- */
.accordion { border-top: var(--bw) solid var(--ink-navy); }

.accordion__item { border-bottom: var(--bw) solid var(--ink-navy); }

.accordion__trigger {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  width: 100%;
  padding: 18px 4px;
  border-left: 4px solid transparent;
  font-size: 17px;
  font-weight: 800;
  line-height: 1.6;
  text-align: left;
  transition: border-color 0.18s var(--ease), padding 0.18s var(--ease),
              color 0.18s var(--ease), background 0.18s var(--ease);
}

.accordion__trigger::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 20px;
  line-height: 1;
  color: var(--gold);
  flex: 0 0 auto;
}

.accordion__item[open] > .accordion__trigger {
  border-left-color: var(--gold);
  padding-left: 16px;
  background: rgba(232, 181, 74, 0.08);
}

.accordion__item[open] > .accordion__trigger::after { content: "–"; }

.accordion__panel {
  padding: 0 4px 22px 20px;
  font-size: 16px;
  line-height: 1.85;
  max-width: 34em;
}

.accordion--ink { border-color: var(--gold); }
.accordion--ink .accordion__item { border-color: var(--gold); }
.accordion--ink .accordion__trigger { color: var(--paper); }
.accordion--ink .accordion__panel { color: var(--paper-70); }

/* ---------- 17. 图片容器 ---------- */
.media-frame {
  position: relative;
  display: block;
  width: 100%;
  overflow: hidden;
  background: var(--ink-navy-2);
  border: var(--bw) solid var(--ink-navy);
  box-shadow: var(--shadow-hard);
}

.media-frame--ink {
  border-color: var(--gold);
  box-shadow: 6px 6px 0 rgba(0, 0, 0, 0.45);
}

.media-frame--16x9 { aspect-ratio: 16 / 9; }
.media-frame--4x3 { aspect-ratio: 4 / 3; }
.media-frame--1x1 { aspect-ratio: 1 / 1; }
.media-frame--wide { aspect-ratio: 21 / 9; }

.media-frame__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.media-frame__caption {
  position: absolute;
  inset: auto 0 0 0;
  padding: 10px 14px;
  background: linear-gradient(180deg, rgba(11, 26, 46, 0), rgba(11, 26, 46, 0.9));
  color: var(--paper);
  font-size: 12px;
  letter-spacing: 0.08em;
  line-height: 1.6;
}

.media-frame--placeholder {
  background-image:
    linear-gradient(135deg, rgba(232, 181, 74, 0.16) 0 2px, transparent 2px 100%),
    repeating-linear-gradient(90deg, rgba(154, 166, 184, 0.12) 0 1px, transparent 1px 40px),
    repeating-linear-gradient(0deg, rgba(154, 166, 184, 0.12) 0 1px, transparent 1px 40px);
  background-color: var(--ink-navy-2);
}

/* ---------- 18. 悬浮入口与返回顶部 ---------- */
.entry-drawer {
  display: none;
  position: fixed;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  z-index: 80;
  flex-direction: column;
  gap: 2px;
}

.entry-drawer__link {
  writing-mode: vertical-rl;
  padding: 14px 10px;
  background: var(--ink-navy-2);
  color: var(--gold);
  border: var(--bw) solid var(--gold);
  border-right: 0;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.16em;
  transition: background 0.18s var(--ease), color 0.18s var(--ease);
}

.entry-drawer__link:hover { background: var(--gold); color: var(--ink-navy); }

@media (min-width: 1100px) {
  .entry-drawer { display: flex; }
}

.back-to-top {
  position: fixed;
  right: 20px;
  bottom: 24px;
  z-index: 85;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 44px;
  padding: 10px 16px;
  background: var(--gold);
  color: var(--ink-navy);
  border: var(--bw) solid var(--ink-navy);
  box-shadow: 4px 4px 0 var(--ink-shadow);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
}

/* ---------- 19. JS 开启后的动效状态 ---------- */
html[data-section-watch] [data-section] {
  opacity: 0.62;
  transition: opacity 0.45s var(--ease);
}

html[data-section-watch] [data-section].is-inview { opacity: 1; }

html[data-reveal-armed] [data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.5s var(--ease), transform 0.5s var(--ease);
}

html[data-reveal-armed] [data-reveal].is-revealed {
  opacity: 1;
  transform: none;
}

/* ---------- 20. 响应式 ---------- */
@media (max-width: 1100px) {
  .footer-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .footer-brand { grid-column: 1 / -1; }
  .footer-contact { grid-column: 1 / -1; }
}

@media (max-width: 900px) {
  html { scroll-padding-top: 120px; }

  .site-nav__upper {
    flex-wrap: wrap;
    row-gap: 10px;
    padding-block: 12px;
  }

  .site-nav__utility,
  .site-nav__tools { display: none; }

  .site-nav__lower {
    gap: 12px;
    padding-bottom: 10px;
  }

  .site-nav__label { display: none; }

  .brand__name { font-size: 18px; }
  .brand__motto { font-size: 11px; }

  /* 无 JS 时的静态降级：栏目平铺可见 */
  .site-nav__list {
    flex-wrap: wrap;
    gap: 0 4px;
    padding-bottom: 6px;
  }

  .site-nav__list a {
    padding: 10px 12px;
    font-size: 15px;
  }

  /* 有 JS 时：折叠为抽拉导航 */
  html[data-js] .nav-toggle { display: inline-flex; }

  html[data-js] .site-nav__list {
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    display: block;
    flex-wrap: nowrap;
    padding: 6px 0 14px;
    background: var(--ink-navy-2);
    border-top: var(--bw) solid var(--gold);
    border-bottom: 3px solid var(--gold);
    max-height: min(70vh, 520px);
    overflow-y: auto;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: opacity 0.18s var(--ease), transform 0.18s var(--ease),
                visibility 0.18s linear;
  }

  html[data-js] .site-nav[data-open] .site-nav__list {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }

  html[data-js] .site-nav__list li + li { border-top: 1px solid var(--line-soft); }

  html[data-js] .site-nav__list a {
    display: block;
    padding: 15px 24px;
    font-size: 17px;
  }

  html[data-js] .site-nav__list a::after { display: none; }

  html[data-js] .site-nav__list a[aria-current="page"] {
    color: var(--gold);
    background: rgba(232, 181, 74, 0.08);
    box-shadow: inset 4px 0 0 var(--gold);
  }

  .path-strip { grid-template-columns: minmax(0, 1fr); }

  .path-strip__step {
    border-right: 0;
    border-bottom: var(--bw) solid var(--gold-soft);
  }

  .path-strip__step:last-child { border-bottom: 0; }
}

@media (max-width: 720px) {
  .footer-grid { grid-template-columns: minmax(0, 1fr); }
  .footer-legal__links { margin-left: 0; }
  .stat-bar { grid-template-columns: minmax(0, 1fr); }
  .stat-bar__item { border-right: 0; border-bottom: 3px solid var(--ink-navy); }
  .stat-bar__item:last-child { border-bottom: 0; }
  .stat-bar--ink .stat-bar__item { border-bottom-color: var(--gold); }
}

/* ---------- 21. 降低动效 ---------- */
@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;
  }

  html[data-section-watch] [data-section] { opacity: 1; }
  html[data-reveal-armed] [data-reveal] { opacity: 1; transform: none; }
}