/* ============================================================
   方造 MINDLOOP · 官网设计系统 v1.0
   视觉规范：银白 / 米黄（金土色系）· 宋体标题 + 无衬线正文
   哲学：立方以制器，守道以御幻
   ============================================================ */

:root {
  /* 金土色系 */
  --bg:        #F6F1E5;   /* 米黄底色 */
  --bg-soft:   #FBF8EF;   /* 浅米 */
  --surface:   #FDFBF4;   /* 卡片表面 */
  --white:     #FFFFFF;
  --ink:       #2B2620;   /* 暖黑正文 */
  --ink-2:     #6E6755;   /* 次级文字 */
  --ink-3:     #9A927D;   /* 弱文字 */
  --gold:      #A5812F;   /* 主金 */
  --gold-deep: #87692A;   /* 深金 */
  --gold-soft: #E9DDBE;   /* 浅金填充 */
  --line:      #E4DAC4;   /* 分隔线 */
  --footer-bg: #262119;   /* 页脚深土 */
  --footer-line:#3A3428;

  --serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "STSong", "SimSun", serif;
  --sans:  -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --en:    "Georgia", "Times New Roman", var(--serif);

  --shadow: 0 6px 24px rgba(80, 66, 30, 0.08);
  --radius: 6px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--sans);
  background: var(--bg);
  color: var(--ink);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  font-size: 16px;
}

/* 背景网格纹理（浅金细线，呼应「范式/规则」） */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(165,129,47,0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(165,129,47,0.05) 1px, transparent 1px);
  background-size: 44px 44px;
  pointer-events: none;
  z-index: 0;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }

.container {
  width: min(1120px, 92%);
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

/* 金土渐变标题 */
.serif { font-family: var(--serif); }
.en { font-family: var(--en); }

/* 金色小块 + 章节标题 */
.sec-tag {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  letter-spacing: 0.32em;
  color: var(--gold-deep);
  font-weight: 600;
}
.sec-tag::before {
  content: "";
  width: 22px;
  height: 1px;
  background: var(--gold);
}
.sec-title {
  font-family: var(--serif);
  font-size: clamp(26px, 3.4vw, 36px);
  font-weight: 700;
  letter-spacing: 0.06em;
  margin: 14px 0 12px;
  line-height: 1.4;
}
.sec-sub {
  color: var(--ink-2);
  max-width: 640px;
  font-size: 15px;
}

.section { padding: 84px 0; }
.section--soft { background: var(--bg-soft); }

/* ---------- 顶部导航 ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(246, 241, 229, 0.88);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}
.brand-mark {
  width: 40px;
  height: 40px;
  border: 1.5px solid var(--gold);
  display: grid;
  place-items: center;
  font-family: var(--serif);
  font-weight: 700;
  font-size: 17px;
  color: var(--gold-deep);
  letter-spacing: 0.08em;
  background: var(--surface);
  box-shadow: inset 0 0 0 3px var(--bg);
}
.brand-mark-img {
  width: 40px;
  height: 40px;
  display: block;
  flex-shrink: 0;
}
.seal-square-img {
  width: 72px;
  height: 72px;
  display: block;
  margin: 0 auto 20px;
}
.brand-name {
  font-family: var(--serif);
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.28em;
  line-height: 1.2;
}
.brand-en {
  font-family: var(--en);
  font-size: 10px;
  letter-spacing: 0.34em;
  color: var(--ink-3);
  text-transform: uppercase;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 34px;
}
.nav-links a {
  font-size: 14.5px;
  letter-spacing: 0.12em;
  color: var(--ink);
  position: relative;
  padding: 6px 0;
  transition: color 0.25s;
}
.nav-links a::after {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  width: 0; height: 2px;
  background: var(--gold);
  transition: width 0.3s;
}
.nav-links a:hover, .nav-links a.active { color: var(--gold-deep); }
.nav-links a:hover::after, .nav-links a.active::after { width: 100%; }
.nav-cta {
  border: 1px solid var(--gold);
  color: var(--gold-deep) !important;
  padding: 8px 20px !important;
  border-radius: var(--radius);
  transition: all 0.25s;
}
.nav-cta:hover { background: var(--gold); color: #fff !important; }
.nav-cta::after { display: none; }

/* 移动端菜单 */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}
.nav-toggle span {
  width: 22px; height: 2px;
  background: var(--ink);
  transition: 0.3s;
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  padding: 96px 0 80px;
  overflow: hidden;
}
.hero::after {
  content: "方";
  position: absolute;
  right: -40px; top: -40px;
  font-family: var(--serif);
  font-size: 320px;
  color: rgba(165,129,47,0.06);
  line-height: 1;
  pointer-events: none;
}
.hero-inner {
  display: grid;
  grid-template-columns: 1.35fr 1fr;
  gap: 60px;
  align-items: center;
}
.hero-slogan {
  font-family: var(--serif);
  font-size: clamp(34px, 5vw, 54px);
  font-weight: 700;
  line-height: 1.5;
  letter-spacing: 0.1em;
}
.hero-slogan em {
  font-style: normal;
  color: var(--gold-deep);
}
.hero-en {
  margin-top: 18px;
  font-family: var(--en);
  font-size: 17px;
  letter-spacing: 0.22em;
  color: var(--ink-3);
}
.hero-sub {
  margin-top: 26px;
  font-family: var(--serif);
  font-size: 19px;
  letter-spacing: 0.18em;
  color: var(--ink-2);
  border-left: 3px solid var(--gold);
  padding-left: 16px;
}
.hero-desc {
  margin-top: 22px;
  color: var(--ink-2);
  max-width: 560px;
  font-size: 15px;
}
.hero-actions {
  margin-top: 34px;
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 30px;
  border-radius: var(--radius);
  font-size: 15px;
  line-height: 1.2; /* 统一 button 与 a.btn 的行高（a 继承正文 1.75 会撑高 6px，导致按钮不对齐） */
  letter-spacing: 0.12em;
  transition: all 0.25s;
  cursor: pointer;
  border: 1px solid transparent;
}
.btn-primary {
  background: var(--gold);
  color: #fff;
}
.btn-primary:hover { background: var(--gold-deep); }
.btn-ghost {
  border-color: var(--gold);
  color: var(--gold-deep);
  background: transparent;
}
.btn-ghost:hover { background: var(--gold-soft); }
/* 按钮行（多按钮并排）：flex 居中 + 紧凑内边距，防溢出换行错位 */
.btn-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}
.btn-row .btn { padding: 12px 20px; letter-spacing: 0.08em; }
/* 外链箭头：独立控制行高，避免回退字体撑高按钮基线 */
.ext-arrow {
  font-size: 0.85em;
  line-height: 1;
  transform: translateY(-1px);
}

/* Hero 右侧：印章卡片 */
.hero-seal {
  display: flex;
  justify-content: center;
}
.seal-card {
  background: var(--surface);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  padding: 40px 36px;
  text-align: center;
  max-width: 340px;
  position: relative;
}
.seal-card::before {
  content: "";
  position: absolute;
  inset: 10px;
  border: 1px solid var(--gold-soft);
  pointer-events: none;
}
.seal-square {
  width: 72px; height: 72px;
  margin: 0 auto 20px;
  border: 2px solid var(--gold);
  display: grid;
  place-items: center;
  font-family: var(--serif);
  font-size: 28px;
  font-weight: 700;
  color: var(--gold-deep);
  transform: rotate(0deg);
  background: var(--bg-soft);
}
.seal-quote {
  font-family: var(--serif);
  font-size: 17px;
  letter-spacing: 0.14em;
  line-height: 2;
  color: var(--ink);
}
.seal-quote cite {
  display: block;
  margin-top: 10px;
  font-size: 12.5px;
  color: var(--ink-3);
  letter-spacing: 0.2em;
  font-style: normal;
}
.seal-en {
  margin-top: 18px;
  font-family: var(--en);
  font-size: 12.5px;
  letter-spacing: 0.14em;
  color: var(--ink-3);
  border-top: 1px dashed var(--line);
  padding-top: 14px;
}

/* ---------- 简介带 ---------- */
.intro-band {
  background: var(--footer-bg);
  color: #E9E2D0;
  padding: 54px 0;
}
.intro-band .container {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 48px;
  align-items: center;
}
.intro-band .sec-tag { color: #D9C58A; }
.intro-band p { color: #D6CEBC; font-size: 15px; }
.intro-quote {
  font-family: var(--serif);
  font-size: 20px;
  letter-spacing: 0.12em;
  line-height: 2;
  color: #F0E9D4;
  border-left: 3px solid var(--gold);
  padding-left: 20px;
}
.intro-quote span { color: #D9C58A; }

/* ---------- 产品卡片 ---------- */
.cards-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
  margin-top: 46px;
}
.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 36px 30px;
  transition: all 0.3s;
  position: relative;
  overflow: hidden;
}
.card::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--gold), transparent);
  opacity: 0;
  transition: opacity 0.3s;
}
.card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow);
  border-color: var(--gold-soft);
}
.card:hover::before { opacity: 1; }
.card-num {
  font-family: var(--en);
  font-size: 13px;
  letter-spacing: 0.3em;
  color: var(--ink-3);
}
.card-icon {
  width: 52px; height: 52px;
  border: 1px solid var(--gold-soft);
  background: var(--bg-soft);
  display: grid;
  place-items: center;
  color: var(--gold-deep);
  margin: 18px 0;
  font-size: 22px;
  font-family: var(--serif);
}
.card h3 {
  font-family: var(--serif);
  font-size: 20px;
  letter-spacing: 0.1em;
  margin-bottom: 12px;
}
.card p { color: var(--ink-2); font-size: 14.5px; }
.card-link {
  display: inline-block;
  margin-top: 20px;
  font-size: 13.5px;
  letter-spacing: 0.18em;
  color: var(--gold-deep);
  border-bottom: 1px solid var(--gold-soft);
  padding-bottom: 2px;
  transition: 0.25s;
}
.card:hover .card-link { border-color: var(--gold); }

/* ---------- 价值观 ---------- */
.values-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
  margin-top: 46px;
}
.value-item {
  background: var(--surface);
  border: 1px solid var(--line);
  padding: 30px 26px;
  border-radius: var(--radius);
  position: relative;
  transition: 0.3s;
}
.value-item:hover { border-color: var(--gold); }
.value-idx {
  font-family: var(--en);
  font-size: 30px;
  color: var(--gold-soft);
  font-weight: 700;
  line-height: 1;
}
.value-item h4 {
  font-family: var(--serif);
  font-size: 19px;
  letter-spacing: 0.14em;
  margin: 12px 0 8px;
}
.value-item p { color: var(--ink-2); font-size: 13.5px; }

/* ---------- 页脚 ---------- */
.footer {
  background: var(--footer-bg);
  color: #A9A290;
  padding: 64px 0 36px;
  position: relative;
  z-index: 1;
}
.footer-top {
  display: grid;
  grid-template-columns: 1.3fr 1fr 1fr 1.2fr;
  gap: 50px;
  padding-bottom: 44px;
  border-bottom: 1px solid var(--footer-line);
}
.footer .brand-name { color: #F0E9D4; }
.footer .brand-en { color: #8A8168; }
.footer-tagline {
  margin-top: 20px;
  font-family: var(--serif);
  font-size: 18px;
  letter-spacing: 0.2em;
  color: #D9C58A;
}
.footer-en {
  margin-top: 8px;
  font-family: var(--en);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: #8A8168;
}
.footer h5 {
  color: #D6CEBC;
  font-size: 14px;
  letter-spacing: 0.24em;
  margin-bottom: 18px;
  font-weight: 600;
}
.footer-links li { margin-bottom: 10px; }
.footer-links a {
  font-size: 14px;
  color: #A9A290;
  transition: color 0.25s;
}
.footer-links a:hover { color: #D9C58A; }
.footer-bottom {
  padding-top: 26px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 13px;
}
.footer-bottom a { color: #8A8168; }
.footer-bottom a:hover { color: #D9C58A; }
.footer-filings {
  display: inline-flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px 18px;
}
.footer-filings a {
  display: inline-flex;
  align-items: center;
  gap: 5px;
}
.footer-filings .beian-icon {
  width: 20px;
  height: 20px;
  display: block;
  flex-shrink: 0;
}

/* ---------- 内页通用 ---------- */
.page-hero {
  padding: 72px 0 52px;
  border-bottom: 1px solid var(--line);
  background: var(--bg-soft);
  position: relative;
  overflow: hidden;
}
.page-hero::after {
  content: "";
  position: absolute;
  right: -30px; bottom: -60px;
  width: 240px; height: 240px;
  border: 1px solid rgba(165,129,47,0.18);
  transform: rotate(45deg);
}
.page-hero .crumb {
  font-size: 13px;
  letter-spacing: 0.2em;
  color: var(--ink-3);
  margin-bottom: 16px;
}
.page-hero h1 {
  font-family: var(--serif);
  font-size: clamp(30px, 4vw, 44px);
  letter-spacing: 0.12em;
  line-height: 1.4;
}
.page-hero .page-en {
  margin-top: 10px;
  font-family: var(--en);
  letter-spacing: 0.3em;
  color: var(--ink-3);
  font-size: 14px;
  text-transform: uppercase;
}
.page-hero .page-desc {
  margin-top: 16px;
  color: var(--ink-2);
  max-width: 660px;
  font-size: 15px;
}

/* 版式：图文块 */
.block {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 54px;
  align-items: start;
  padding: 40px 0;
}
.block + .block {
  border-top: 1px solid var(--line);
}
.block-label {
  font-family: var(--serif);
  font-size: 24px;
  letter-spacing: 0.14em;
  line-height: 1.6;
  color: var(--gold-deep);
  position: sticky;
  top: 100px;
}
.block-label small {
  display: block;
  font-family: var(--sans);
  font-size: 12px;
  letter-spacing: 0.3em;
  color: var(--ink-3);
  margin-bottom: 10px;
  font-weight: 400;
}
.block-body p { margin-bottom: 16px; color: var(--ink-2); font-size: 15px; }
.block-body p strong { color: var(--ink); }

/* 引文 */
.quote-block {
  background: var(--surface);
  border: 1px solid var(--line);
  border-left: 4px solid var(--gold);
  padding: 34px 36px;
  margin: 30px 0;
  font-family: var(--serif);
  font-size: 19px;
  line-height: 2.2;
  letter-spacing: 0.08em;
  color: var(--ink);
}
.quote-block cite {
  display: block;
  margin-top: 12px;
  font-size: 13px;
  color: var(--ink-3);
  font-style: normal;
  letter-spacing: 0.16em;
}

/* 表格 */
.tbl-wrap { overflow-x: auto; margin: 26px 0; }
table.tbl {
  width: 100%;
  border-collapse: collapse;
  background: var(--surface);
  font-size: 14.5px;
}
.tbl th {
  background: var(--bg-soft);
  font-family: var(--serif);
  font-weight: 700;
  letter-spacing: 0.1em;
  text-align: left;
  padding: 14px 18px;
  border: 1px solid var(--line);
  white-space: nowrap;
}
.tbl td {
  padding: 14px 18px;
  border: 1px solid var(--line);
  color: var(--ink-2);
  vertical-align: top;
}
.tbl td strong { color: var(--ink); }

/* 大引文（BP 故事） */
.bp-story { max-width: 780px; margin: 0 auto; }
.bp-hero-quote {
  font-family: var(--serif);
  font-size: clamp(24px, 3.4vw, 32px);
  line-height: 2;
  letter-spacing: 0.1em;
  text-align: center;
  color: var(--gold-deep);
  padding: 40px 0;
}
.bp-hero-quote span {
  display: block;
  font-size: 14px;
  letter-spacing: 0.3em;
  color: var(--ink-3);
  margin-top: 14px;
  font-family: var(--sans);
}
.bp-chapter {
  padding: 40px 0;
  border-top: 1px solid var(--line);
}
.bp-chapter:first-of-type { border-top: none; }
.bp-chapter .bp-tag {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 0.3em;
  color: var(--gold-deep);
  border: 1px solid var(--gold-soft);
  padding: 4px 14px;
  margin-bottom: 18px;
  background: var(--bg-soft);
}
.bp-chapter h2 {
  font-family: var(--serif);
  font-size: 24px;
  letter-spacing: 0.14em;
  margin-bottom: 16px;
}
.bp-chapter p { color: var(--ink-2); margin-bottom: 14px; font-size: 15.5px; }
.bp-chapter .bp-key {
  font-family: var(--serif);
  font-size: 20px;
  letter-spacing: 0.1em;
  color: var(--ink);
  line-height: 2;
  border-left: 3px solid var(--gold);
  padding-left: 18px;
  margin: 20px 0;
}
.bp-chapter .bp-key span { color: var(--gold-deep); }

/* 悬浮在线客服（企业微信获客入口） */
.cs-fab {
  position: fixed;
  right: 22px;
  bottom: 26px;
  z-index: 60;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 18px;
  border-radius: 999px;
  background: var(--gold);
  color: #fff;
  font-size: 14px;
  letter-spacing: 0.06em;
  text-decoration: none;
  box-shadow: 0 8px 22px rgba(0, 0, 0, 0.22);
  transition: all 0.25s;
}
.cs-fab:hover { background: var(--gold-deep); transform: translateY(-2px); }
.cs-fab .cs-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #7DD3A0;
}
@media (max-width: 640px) {
  .cs-fab { right: 14px; bottom: 16px; padding: 10px 15px; font-size: 13px; }
}

/* 联系我们 */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 26px;
  margin-top: 40px;
}
.contact-item {
  background: var(--surface);
  border: 1px solid var(--line);
  padding: 30px 32px;
  border-radius: var(--radius);
}
.contact-item h3 {
  font-family: var(--serif);
  font-size: 17px;
  letter-spacing: 0.16em;
  color: var(--gold-deep);
  margin-bottom: 10px;
}
.contact-item p { color: var(--ink-2); font-size: 14.5px; }
.contact-item .pending {
  display: inline-block;
  margin-top: 6px;
  font-size: 12px;
  color: var(--ink-3);
  border: 1px dashed var(--gold-soft);
  padding: 2px 10px;
}
.contact-item .done {
  display: inline-block;
  margin-top: 6px;
  font-size: 12px;
  color: var(--gold-deep);
  border: 1px solid var(--gold-soft);
  padding: 2px 10px;
}

/* 页面底部导航 */
.page-nav {
  margin-top: 60px;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}
.page-nav a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 1px solid var(--line);
  background: var(--surface);
  padding: 10px 22px;
  font-size: 13.5px;
  letter-spacing: 0.14em;
  color: var(--ink-2);
  transition: 0.25s;
  border-radius: var(--radius);
}
.page-nav a:hover { border-color: var(--gold); color: var(--gold-deep); }

/* 滚动显现 */
.reveal { opacity: 0; transform: translateY(22px); transition: opacity 0.6s ease, transform 0.6s ease; }
.reveal.in { opacity: 1; transform: none; }

/* 五板块总览（自适应列数） */
.grid5 { grid-template-columns: repeat(5, 1fr); }
@media (max-width: 1100px) { .grid5 { grid-template-columns: repeat(3, 1fr); } }
@media (max-width: 760px)  { .grid5 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 480px)  { .grid5 { grid-template-columns: 1fr; } }
.grid5 .value-item { display: block; }

/* ---------- 响应式 ---------- */
@media (max-width: 900px) {
  .hero-inner { grid-template-columns: 1fr; gap: 40px; }
  .hero-seal { justify-content: flex-start; }
  .intro-band .container { grid-template-columns: 1fr; }
  .cards-3 { grid-template-columns: 1fr; }
  .values-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-top { grid-template-columns: 1fr; gap: 34px; }
  .block { grid-template-columns: 1fr; gap: 20px; }
  .block-label { position: static; }
  .contact-grid { grid-template-columns: 1fr; }
  .nav-links {
    position: fixed;
    inset: 72px 0 auto 0;
    background: var(--bg-soft);
    flex-direction: column;
    padding: 26px 0 30px;
    gap: 20px;
    border-bottom: 1px solid var(--line);
    transform: translateY(-120%);
    transition: transform 0.3s;
    box-shadow: var(--shadow);
  }
  .nav-links.open { transform: translateY(0); }
  .nav-toggle { display: flex; }
}
@media (max-width: 560px) {
  .values-grid { grid-template-columns: 1fr; }
  .section { padding: 60px 0; }
  .hero { padding: 64px 0 56px; }
}

/* ---------- 视频演示弹层 ---------- */
.video-modal {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: rgba(24, 20, 12, 0.9);
  display: none;
  align-items: center;
  justify-content: center;
  padding: 6vh 4vw;
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}
.video-modal.open { display: flex; }
.video-modal-box {
  position: relative;
  width: min(960px, 100%);
  background: var(--footer-bg);
  border: 1px solid var(--footer-line);
  box-shadow: 0 24px 70px rgba(0,0,0,0.55);
  animation: vmodal-in 0.28s ease;
}
@keyframes vmodal-in {
  from { opacity: 0; transform: translateY(18px) scale(0.985); }
  to   { opacity: 1; transform: none; }
}
.video-modal-close {
  position: absolute;
  top: -46px;
  right: 0;
  background: none;
  border: 1px solid rgba(233,226,208,0.35);
  color: #F0E9D4;
  font-size: 13px;
  letter-spacing: 0.22em;
  padding: 9px 18px;
  cursor: pointer;
  transition: 0.25s;
  font-family: var(--sans);
}
.video-modal-close:hover {
  background: var(--gold);
  border-color: var(--gold);
  color: #fff;
}
.video-modal video {
  width: 100%;
  display: block;
  aspect-ratio: 16 / 9;
  background: #000;
  outline: none;
}
.video-modal-cap {
  padding: 12px 18px;
  font-size: 13px;
  color: #A9A290;
  letter-spacing: 0.08em;
  margin: 0;
}

/* ============================================================
   双语（中 / EN）适配层 v1.0
   中文版不受影响；html[lang="en"] 下切换字体栈并收窄字距
   ============================================================ */
html[lang="en"] {
  --serif: Georgia, "Times New Roman", "Noto Serif SC", "Songti SC", serif;
  --sans: "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
  --en: Georgia, "Times New Roman", serif;
}
html[lang="en"] body { font-size: 15.5px; }

/* 语言切换按钮（导航内，描金小按钮） */
.lang-switch {
  border: 1px solid var(--gold);
  color: var(--gold-deep) !important;
  padding: 6px 15px !important;
  border-radius: var(--radius);
  font-size: 12.5px !important;
  letter-spacing: 0.18em;
  transition: all 0.25s;
  flex-shrink: 0;
  white-space: nowrap;
}
.lang-switch:hover { background: var(--gold); color: #fff !important; }
.lang-switch::after { display: none; }

/* 登录 / 注册双入口间距 + 关闭态按钮 */
.nav-auth { display: inline-flex; align-items: center; gap: 4px; }
.btn[aria-disabled="true"] { opacity: .55; cursor: not-allowed; pointer-events: none; }

/* 英文版：全角宽字距收窄为适合拉丁字母的字距 */
html[lang="en"] .nav-links a,
html[lang="en"] .footer-links a,
html[lang="en"] .page-nav a,
html[lang="en"] .footer-bottom a { letter-spacing: 0.03em; }
html[lang="en"] .sec-tag,
html[lang="en"] .crumb,
html[lang="en"] .footer h5,
html[lang="en"] .brand-en,
html[lang="en"] .hero-en,
html[lang="en"] .page-en,
html[lang="en"] .seal-en,
html[lang="en"] .footer-en,
html[lang="en"] .block-label small,
html[lang="en"] .bp-tag,
html[lang="en"] .card-num,
html[lang="en"] .lang-switch { letter-spacing: 0.08em; }
html[lang="en"] .hero-slogan,
html[lang="en"] .sec-title,
html[lang="en"] .page-hero h1 { letter-spacing: 0.02em; line-height: 1.3; }
html[lang="en"] .intro-quote,
html[lang="en"] .quote-block,
html[lang="en"] .seal-quote,
html[lang="en"] .block-label { letter-spacing: 0.015em; }
html[lang="en"] .block-label { line-height: 1.9; }

/* ---------- 打印友好 ---------- */
@media print {
  .nav, .page-nav, .footer { display: none; }
  body { background: #fff; }
  body::before { display: none; }
}