/* =====================================================
   博澳娱乐 中文官网 · Site Kit 共享样式
   概念：金框夜航 / 深海军蓝 + 香槟金
   ===================================================== */

/* ---------- 设计变量 ---------- */
:root {
  --c-sea: #0B1B3A;
  --c-royal: #142C5A;
  --c-gold: #C9A44B;
  --c-gold-light: #E5C873;
  --c-red: #8E2B3C;
  --c-ivory: #F5F0E8;
  --c-fog: #A9B7D4;
  --c-midnight: #0A0F1A;
  --c-jade: #2F7D5B;
  --c-glass: rgba(255,255,255,0.08);

  --font-head: "Noto Serif SC", "Songti SC", "STSong", "SimSun", serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", "WenQuanYi Micro Hei", sans-serif;

  --header-h: 68px;
  --announce-h: 34px;
  --container: 1280px;
  --ease: cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --shadow: 0 20px 60px rgba(0,0,0,0.35);
}

/* ---------- 重置与基础 ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: var(--font-body);
  font-weight: 300;
  font-size: 1rem;
  line-height: 1.7;
  letter-spacing: 0.01em;
  background-color: var(--c-sea);
  color: var(--c-ivory);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

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

ul,
ol {
  list-style: none;
}

a {
  color: var(--c-gold);
  text-decoration: none;
  transition: color 0.25s ease;
}

a:hover {
  color: var(--c-gold-light);
}

p {
  margin-bottom: 1em;
}

p:last-child {
  margin-bottom: 0;
}

h1,
h2,
h3,
h4 {
  font-family: var(--font-head);
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: 0.02em;
  color: var(--c-ivory);
}

button {
  font: inherit;
  color: inherit;
  background: none;
  border: none;
  cursor: pointer;
}

::selection {
  background: rgba(201, 164, 75, 0.3);
  color: var(--c-ivory);
}

:focus-visible {
  outline: 2px solid var(--c-gold);
  outline-offset: 3px;
}

::-webkit-scrollbar {
  width: 10px;
}

::-webkit-scrollbar-track {
  background: var(--c-midnight);
}

::-webkit-scrollbar-thumb {
  background: var(--c-sea);
  border: 2px solid var(--c-midnight);
  border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--c-gold);
}

/* ---------- 工具类 ---------- */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 48px;
}

.page-pad {
  padding-top: calc(var(--announce-h) + var(--header-h));
}

.page-title {
  font-size: clamp(2rem, 4vw, 2.8rem);
  line-height: 1.2;
  margin-bottom: 12px;
}

.page-intro {
  font-size: 1.05rem;
  color: var(--c-fog);
  max-width: 60ch;
}

/* ---------- 跳转链接 ---------- */
.skip-link {
  position: fixed;
  top: -120px;
  left: 16px;
  z-index: 2000;
  padding: 12px 24px;
  background: var(--c-gold);
  color: var(--c-midnight);
  font-weight: 700;
  font-size: 0.92rem;
  border-radius: 2px;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.4);
  transition: top 0.3s var(--ease);
}

.skip-link:focus {
  top: 12px;
  color: var(--c-midnight);
}

/* ---------- 全局按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  font-size: 0.92rem;
  font-family: var(--font-body);
  font-weight: 500;
  letter-spacing: 0.08em;
  line-height: 1.4;
  border: 1px solid transparent;
  border-radius: 2px;
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease), background-color 0.3s var(--ease), color 0.3s var(--ease), border-color 0.3s var(--ease);
}

.btn-gold {
  background: linear-gradient(135deg, var(--c-gold-light) 0%, var(--c-gold) 60%, #A8853A 100%);
  color: var(--c-midnight);
  font-weight: 700;
  box-shadow: 0 8px 24px rgba(201, 164, 75, 0.25);
}

.btn-gold:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 30px rgba(201, 164, 75, 0.35);
  color: var(--c-midnight);
  filter: brightness(1.05);
}

.btn-outline {
  border-color: var(--c-gold);
  color: var(--c-gold);
  background: transparent;
}

.btn-outline:hover {
  background: rgba(201, 164, 75, 0.1);
  border-color: var(--c-gold-light);
  color: var(--c-gold-light);
}

.btn-small {
  padding: 8px 18px;
  font-size: 0.84rem;
}

/* ---------- 页头 ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: transparent;
  transition: background-color 0.4s var(--ease), box-shadow 0.4s var(--ease), border-color 0.4s var(--ease);
  border-bottom: 1px solid transparent;
}

.site-header.is-scrolled {
  background: rgba(11, 27, 58, 0.88);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  border-bottom-color: rgba(201, 164, 75, 0.25);
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
}

.site-header:not(.is-scrolled) .nav-link,
.site-header:not(.is-scrolled) .brand-name,
.site-header:not(.is-scrolled) .brand-sub {
  text-shadow: 0 2px 12px rgba(10, 15, 26, 0.6);
}

.header-announce {
  overflow: hidden;
  max-height: var(--announce-h);
  background: rgba(10, 15, 26, 0.65);
  -webkit-backdrop-filter: blur(4px);
  backdrop-filter: blur(4px);
  border-bottom: 1px solid rgba(201, 164, 75, 0.15);
  transition: max-height 0.45s var(--ease), opacity 0.45s var(--ease), border-color 0.45s var(--ease);
}

.site-header.is-scrolled .header-announce {
  max-height: 0;
  opacity: 0;
  border-bottom-color: transparent;
}

.header-announce-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 6px 48px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.header-announce-caret {
  color: var(--c-gold);
  font-size: 8px;
  line-height: 1;
  flex-shrink: 0;
  animation: caretPulse 3s ease-in-out infinite;
}

@keyframes caretPulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.35; }
}

.header-announce-text {
  font-size: 0.78rem;
  color: var(--c-fog);
  letter-spacing: 0.04em;
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
  margin: 0;
}

.header-main-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 48px;
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}

/* ---------- 品牌 ---------- */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  flex-shrink: 0;
}

.brand:hover {
  color: var(--c-ivory);
}

.brand-mark {
  position: relative;
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  font-family: var(--font-head);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--c-gold);
  z-index: 0;
}

.brand-mark::before {
  content: "";
  position: absolute;
  inset: 1px;
  border: 1px solid var(--c-gold);
  border-radius: 1px;
  transform: rotate(45deg);
  background: rgba(201, 164, 75, 0.06);
  z-index: -1;
  transition: transform 0.4s var(--ease);
}

.brand-mark::after {
  content: "";
  position: absolute;
  inset: 7px;
  border: 1px solid rgba(201, 164, 75, 0.4);
  border-radius: 1px;
  transform: rotate(45deg);
  transition: transform 0.4s var(--ease);
}

.brand:hover .brand-mark::before {
  transform: rotate(135deg);
}

.brand:hover .brand-mark::after {
  transform: rotate(135deg);
}

.brand-type {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.brand-name {
  font-family: var(--font-head);
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--c-ivory);
  line-height: 1.2;
}

.brand-sub {
  font-size: 0.72rem;
  color: var(--c-gold);
  letter-spacing: 0.42em;
  margin-top: 2px;
}

/* ---------- 导航 ---------- */
.site-nav {
  display: flex;
  align-items: center;
  gap: 24px;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-link {
  display: block;
  padding: 8px 16px;
  font-size: 0.92rem;
  color: var(--c-ivory);
  letter-spacing: 0.05em;
  position: relative;
  transition: color 0.25s ease;
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 16px;
  right: 100%;
  bottom: 2px;
  height: 1px;
  background: var(--c-gold);
  transition: right 0.3s var(--ease);
}

.nav-link:hover {
  color: var(--c-gold-light);
}

.nav-link:hover::after {
  right: 16px;
}

.nav-link[aria-current="page"] {
  color: var(--c-gold);
}

.nav-link[aria-current="page"]::after {
  right: 16px;
  background: var(--c-gold);
  box-shadow: 0 0 8px rgba(201, 164, 75, 0.6);
}

.nav-fav {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 18px;
  border: 1px solid var(--c-gold);
  color: var(--c-gold);
  font-size: 0.88rem;
  letter-spacing: 0.1em;
  border-radius: 2px;
  transition: background-color 0.3s var(--ease), color 0.3s var(--ease), border-color 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

.nav-fav:hover {
  background: rgba(201, 164, 75, 0.12);
  border-color: var(--c-gold-light);
  color: var(--c-gold-light);
  box-shadow: 0 0 20px rgba(201, 164, 75, 0.15);
}

.nav-fav-star {
  color: var(--c-gold);
  font-size: 0.9rem;
  transition: transform 0.3s ease;
}

.nav-fav:hover .nav-fav-star {
  transform: scale(1.15) rotate(8deg);
}

/* ---------- 移动端导航按钮 ---------- */
.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  flex-shrink: 0;
  align-items: center;
  justify-content: center;
}

.nav-toggle-box {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
  width: 24px;
}

.nav-toggle-bar {
  display: block;
  height: 1.5px;
  background: var(--c-ivory);
  transition: transform 0.35s var(--ease), opacity 0.35s var(--ease), background-color 0.35s ease;
}

.nav-toggle:hover .nav-toggle-bar {
  background: var(--c-gold);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) {
  transform: translateY(7.5px) rotate(45deg);
  background: var(--c-gold);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3) {
  transform: translateY(-7.5px) rotate(-45deg);
  background: var(--c-gold);
}

/* ---------- 移动端抽屉遮罩 ---------- */
.nav-scrim {
  display: none;
}

/* ---------- 页脚 ---------- */
.site-footer {
  background:
    radial-gradient(1400px 600px at 85% 0%, rgba(201, 164, 75, 0.06), transparent 60%),
    var(--c-midnight);
  border-top: 1px solid rgba(201, 164, 75, 0.18);
  position: relative;
}

.footer-top {
  display: flex;
  align-items: center;
  gap: 18px;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 48px;
  height: 48px;
}

.footer-top-line {
  flex: 1;
  height: 1px;
  background: linear-gradient(270deg, rgba(201, 164, 75, 0.4), transparent);
}

.footer-top-line:last-of-type {
  background: linear-gradient(90deg, rgba(201, 164, 75, 0.4), transparent);
}

.footer-top-diamond {
  color: var(--c-gold);
  font-size: 9px;
}

.footer-main {
  max-width: var(--container);
  margin: 0 auto;
  padding: 20px 48px 48px;
  display: grid;
  grid-template-columns: 4fr 2fr 2fr 3fr;
  gap: 40px;
}

.footer-brand .brand-name {
  font-size: 1.2rem;
}

.footer-tagline {
  font-family: var(--font-head);
  font-size: 1.05rem;
  color: var(--c-gold-light);
  margin: 20px 0 10px;
}

.footer-trust {
  font-size: 0.8rem;
  color: var(--c-fog);
  line-height: 1.7;
  max-width: 46ch;
  opacity: 0.85;
}

.footer-heading {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--c-gold);
  letter-spacing: 0.18em;
  margin-bottom: 18px;
  position: relative;
  padding-bottom: 8px;
}

.footer-heading::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 24px;
  height: 1px;
  background: var(--c-gold);
}

.footer-link-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-link-list a,
.footer-contact-list a {
  color: var(--c-fog);
  font-size: 0.9rem;
  transition: color 0.25s ease, padding-left 0.3s var(--ease);
}

.footer-link-list a:hover,
.footer-contact-list a:hover {
  color: var(--c-gold-light);
  padding-left: 6px;
}

.footer-contact-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  color: var(--c-fog);
  font-size: 0.9rem;
}

.contact-label {
  display: inline-block;
  min-width: 3.2em;
  color: var(--c-gold);
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  margin-right: 8px;
}

.footer-contact-note {
  font-size: 0.78rem;
  color: var(--c-fog);
  opacity: 0.7;
  margin: 14px 0 16px;
}

.footer-bottom {
  border-top: 1px solid var(--c-glass);
  padding: 20px 0;
}

.footer-bottom-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 48px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  text-align: center;
}

.footer-copy,
.footer-icp {
  font-size: 0.78rem;
  color: var(--c-fog);
  opacity: 0.75;
}

/* ---------- 返回顶部 ---------- */
.back-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 900;
  width: 46px;
  height: 46px;
  display: grid;
  place-items: center;
  border: 1px solid rgba(201, 164, 75, 0.4);
  border-radius: 50%;
  background: rgba(11, 27, 58, 0.8);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  color: var(--c-gold);
  font-size: 1.1rem;
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: opacity 0.35s var(--ease), transform 0.35s var(--ease), visibility 0.35s ease, background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
}

.back-top.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-top:hover {
  background: var(--c-gold);
  border-color: var(--c-gold);
  color: var(--c-midnight);
}

/* ---------- 章节叙事 ---------- */
.section {
  padding: 80px 0;
}

.section-head {
  display: grid;
  grid-template-columns: auto 1fr;
  grid-template-rows: auto auto;
  grid-template-areas: "no title" ". note";
  column-gap: 28px;
  row-gap: 6px;
  align-items: end;
  margin-bottom: 36px;
}

.section-no {
  grid-area: no;
  font-family: var(--font-head);
  font-size: 3rem;
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--c-gold);
  opacity: 0.35;
  padding-bottom: 6px;
}

.section-title {
  grid-area: title;
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  line-height: 1.3;
}

.section-note {
  grid-area: note;
  font-size: 0.875rem;
  color: var(--c-fog);
  border-left: 1px solid var(--c-gold);
  padding-left: 14px;
  margin: 8px 0 0;
}

/* ---------- 卡片 ---------- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 24px;
}

.card {
  background: var(--c-royal);
  border: 1px solid var(--c-glass);
  border-radius: 2px;
  padding: 28px;
  position: relative;
  transition: transform 0.35s var(--ease), box-shadow 0.35s var(--ease), border-color 0.35s var(--ease);
}

.card::before {
  content: "";
  position: absolute;
  top: -1px;
  left: -1px;
  width: 28px;
  height: 28px;
  border-top: 2px solid var(--c-gold);
  border-left: 2px solid var(--c-gold);
  opacity: 0;
  transition: opacity 0.35s ease;
}

.card:hover {
  transform: translateY(-6px);
  border-color: rgba(201, 164, 75, 0.45);
  box-shadow: var(--shadow);
}

.card:hover::before {
  opacity: 1;
}

.card-title {
  font-size: 1.2rem;
  margin-bottom: 10px;
  line-height: 1.4;
}

.card-text {
  font-size: 0.9rem;
  color: var(--c-fog);
  margin-bottom: 0;
}

.card-meta {
  display: block;
  margin-top: 14px;
  font-size: 0.78rem;
  color: var(--c-gold);
  opacity: 0.85;
  letter-spacing: 0.08em;
}

/* ---------- 标签页 ---------- */
.tabs {
  position: relative;
}

.tab-list {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  border-bottom: 1px solid var(--c-glass);
  margin-bottom: 28px;
}

.tab-btn {
  padding: 12px 24px;
  font-size: 0.92rem;
  font-family: var(--font-body);
  color: var(--c-fog);
  letter-spacing: 0.05em;
  border: 1px solid transparent;
  border-bottom: none;
  border-radius: 2px 2px 0 0;
  position: relative;
  transition: color 0.25s ease, background-color 0.25s ease, border-color 0.25s ease;
}

.tab-btn::after {
  content: "";
  position: absolute;
  left: 20px;
  right: 20px;
  bottom: -1px;
  height: 2px;
  background: var(--c-gold);
  transform: scaleX(0);
  transition: transform 0.3s var(--ease);
}

.tab-btn:hover {
  color: var(--c-ivory);
}

.tab-btn[aria-selected="true"] {
  color: var(--c-gold);
  background: rgba(201, 164, 75, 0.06);
  border-color: var(--c-glass);
}

.tab-btn[aria-selected="true"]::after {
  transform: scaleX(1);
}

.tab-panel {
  animation: fadeSlideIn 0.45s var(--ease);
}

.tab-panel[hidden] {
  display: none;
}

@keyframes fadeSlideIn {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ---------- 图片框架 ---------- */
.img-frame {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  border: 1px solid rgba(201, 164, 75, 0.3);
  background:
    linear-gradient(120deg, transparent 30%, rgba(201, 164, 75, 0.08) 50%, transparent 70%),
    radial-gradient(circle at 80% 20%, rgba(201, 164, 75, 0.12) 0%, transparent 45%),
    linear-gradient(145deg, var(--c-royal) 0%, var(--c-sea) 55%, var(--c-midnight) 100%);
}

.img-frame::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
}

.img-frame::after {
  content: "";
  position: absolute;
  inset: 12px;
  z-index: 2;
  border: 1px solid rgba(201, 164, 75, 0.2);
  pointer-events: none;
}

.img-frame > img {
  position: absolute;
  inset: 0;
  z-index: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.img-frame > .img-content {
  position: relative;
  z-index: 3;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.img-hero {
  aspect-ratio: 21 / 9;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 32px), calc(100% - 32px) 100%, 0 100%);
}

.img-card {
  aspect-ratio: 4 / 3;
}

.img-portrait {
  aspect-ratio: 3 / 4;
}

/* ---------- 首屏框景 ---------- */
.frame-hero {
  position: relative;
  border: 1px solid rgba(201, 164, 75, 0.35);
  padding: clamp(24px, 4vw, 56px);
  background: linear-gradient(160deg, rgba(20, 44, 90, 0.55), rgba(11, 27, 58, 0.25));
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
}

.frame-hero::before {
  content: "";
  position: absolute;
  inset: 12px;
  border: 1px solid rgba(201, 164, 75, 0.15);
  pointer-events: none;
}

.frame-hero::after {
  content: "";
  position: absolute;
  top: -1px;
  left: -1px;
  width: 64px;
  height: 64px;
  border-top: 2px solid var(--c-gold);
  border-left: 2px solid var(--c-gold);
  pointer-events: none;
}

/* ---------- 索引目录 ---------- */
.index-list {
  border-top: 1px solid var(--c-glass);
}

.index-list li {
  display: grid;
  grid-template-columns: 60px 1fr auto;
  gap: 18px;
  align-items: baseline;
  padding: 18px 4px;
  border-bottom: 1px solid var(--c-glass);
  transition: background-color 0.3s ease, padding-left 0.3s var(--ease);
}

.index-list li:hover {
  background: rgba(201, 164, 75, 0.04);
  padding-left: 12px;
}

.index-no {
  font-family: var(--font-head);
  font-size: 0.9rem;
  color: var(--c-gold);
  opacity: 0.6;
}

.index-main {
  color: var(--c-ivory);
  font-size: 0.98rem;
}

.index-meta {
  font-size: 0.78rem;
  color: var(--c-fog);
}

/* ---------- 装饰分隔与旁注 ---------- */
.divider-gold {
  display: flex;
  align-items: center;
  gap: 14px;
  margin: 36px 0;
  color: var(--c-gold);
}

.divider-gold::before,
.divider-gold::after {
  content: "";
  height: 1px;
  flex: 1;
  background: linear-gradient(90deg, transparent, rgba(201, 164, 75, 0.5));
}

.divider-gold::after {
  background: linear-gradient(90deg, rgba(201, 164, 75, 0.5), transparent);
}

.divider-gold .divider-icon {
  font-size: 0.7rem;
}

.note {
  font-size: 0.82rem;
  color: var(--c-fog);
  border-left: 2px solid var(--c-gold);
  padding-left: 16px;
  margin: 24px 0;
  opacity: 0.9;
}

/* ---------- 面包屑 ---------- */
.breadcrumbs {
  padding: 8px 0 28px;
  font-size: 0.82rem;
  color: var(--c-fog);
}

.crumb-list {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
}

.crumb-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.crumb-item + .crumb-item::before {
  content: "／";
  color: rgba(169, 183, 212, 0.5);
  font-size: 0.72rem;
}

.crumb-link {
  color: var(--c-fog);
}

.crumb-link:hover {
  color: var(--c-gold);
}

.crumb-current {
  color: var(--c-ivory);
}

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .footer-main {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }

  .footer-brand-col {
    grid-column: 1 / -1;
  }
}

@media (max-width: 960px) {
  :root {
    --header-h: 60px;
  }

  .header-main-inner {
    padding: 0 20px;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .site-nav {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    z-index: 1100;
    width: min(86vw, 420px);
    flex-direction: column;
    align-items: flex-start;
    justify-content: flex-start;
    gap: 0;
    padding: 84px 36px 40px;
    overflow-y: auto;
    background: rgba(10, 15, 26, 0.97);
    -webkit-backdrop-filter: blur(18px);
    backdrop-filter: blur(18px);
    box-shadow: -20px 0 60px rgba(0, 0, 0, 0.45);
    transform: translateX(100%);
    transition: transform 0.4s var(--ease);
  }

  .site-nav[data-open] {
    transform: translateX(0);
  }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    width: 100%;
    padding-bottom: 20px;
    margin-bottom: 20px;
    border-bottom: 1px solid var(--c-glass);
  }

  .nav-link {
    font-family: var(--font-head);
    font-size: 1.08rem;
    padding: 13px 10px;
    border-left: 2px solid transparent;
    transition: color 0.25s ease, padding-left 0.3s var(--ease), border-color 0.25s ease;
  }

  .nav-link::after {
    display: none;
  }

  .nav-link:hover {
    color: var(--c-gold-light);
    padding-left: 18px;
  }

  .nav-link[aria-current="page"] {
    color: var(--c-gold);
    border-left-color: var(--c-gold);
    padding-left: 18px;
  }

  .nav-fav {
    width: 100%;
    justify-content: center;
    padding: 12px;
  }

  .nav-scrim {
    display: block;
    position: fixed;
    inset: 0;
    z-index: 1040;
    background: rgba(10, 15, 26, 0.5);
    -webkit-backdrop-filter: blur(2px);
    backdrop-filter: blur(2px);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.35s var(--ease), visibility 0.35s ease;
  }

  .site-nav[data-open] ~ .nav-scrim {
    opacity: 1;
    visibility: visible;
  }

  .header-announce-inner {
    padding: 6px 20px;
  }

  .header-announce-text {
    font-size: 0.72rem;
  }

  .page-pad {
    padding-top: calc(var(--announce-h) + var(--header-h));
  }

  .section {
    padding: 56px 0;
  }

  .section-head {
    grid-template-columns: 1fr;
    grid-template-areas: "no" "title" "note";
    row-gap: 8px;
    column-gap: 0;
    margin-bottom: 28px;
  }

  .section-no {
    font-size: 2.4rem;
    padding-bottom: 0;
  }

  .img-hero {
    clip-path: none;
  }
}

@media (max-width: 720px) {
  .container {
    padding: 0 20px;
  }

  .header-announce-text {
    letter-spacing: 0.02em;
  }

  .footer-main {
    grid-template-columns: 1fr 1fr;
    gap: 28px 20px;
    padding: 10px 20px 36px;
  }

  .footer-brand-col,
  .footer-contact-col {
    grid-column: 1 / -1;
  }

  .footer-bottom-inner {
    padding: 0 20px;
  }

  .footer-top {
    padding: 0 20px;
  }

  .back-top {
    right: 16px;
    bottom: 16px;
    width: 42px;
    height: 42px;
  }

  .card-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .index-list li {
    grid-template-columns: 40px 1fr;
    gap: 12px;
  }

  .index-meta {
    grid-column: 2;
    margin-top: -6px;
  }
}

/* ---------- 无障碍：减少动效 ---------- */
@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;
  }

  .tab-panel {
    animation: none;
  }

  .site-nav,
  .nav-scrim,
  .header-announce,
  .back-top,
  .nav-toggle-bar,
  .brand-mark::before,
  .brand-mark::after {
    transition: none;
  }
}