/* ==========================================================================
   华体会HTH · 共享 Site CSS
   /assets/site.css
   ========================================================================== */

/* ---------- 1. 设计令牌 ---------- */
:root {
  --color-ink: #2B2926;
  --color-rock: #403D37;
  --color-stone: #6E675E;
  --color-moss: #556B4D;
  --color-moss-light: #8FA985;
  --color-clay: #B45F3F;
  --color-clay-light: #D89A7E;
  --color-cream: #F5EDE3;
  --color-signal: #E8491B;
  --color-deepblue: #1E3A5F;
  --color-gold: #C9A227;
  --color-panel: #FFFFFF;

  --font-head: "Inter", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;

  --rail-w: clamp(260px, 20vw, 320px);
  --header-h-mobile: 64px;
  --content-max: 1240px;

  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 2rem;
  --space-lg: 4rem;
  --space-xl: 6rem;

  --radius-sm: 6px;
  --radius-md: 14px;
  --radius-lg: 24px;

  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --shadow-card: 0 4px 20px rgba(43, 41, 38, 0.08);
  --shadow-panel: 0 10px 44px rgba(43, 41, 38, 0.12);
  --transition: 0.3s var(--ease-out);
}

/* ---------- 2. Reset 与基础 ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h-mobile) + 1rem);
  -webkit-text-size-adjust: 100%;
}

body {
  display: flex;
  flex-direction: column;
  min-height: 100dvh;
  margin: 0;
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.75;
  color: var(--color-ink);
  background:
    radial-gradient(circle at 18% 8%, rgba(216, 154, 126, 0.18) 0%, transparent 42%),
    radial-gradient(circle at 86% 92%, rgba(85, 107, 77, 0.1) 0%, transparent 38%),
    var(--color-cream);
  -webkit-font-smoothing: antialiased;
}

h1,
h2,
h3,
h4 {
  font-family: var(--font-head);
  font-weight: 400;
  line-height: 1.25;
}

p {
  margin: 0;
}

ul,
ol {
  margin: 0;
  padding: 0;
}

li {
  list-style: none;
}

a {
  color: var(--color-moss);
  text-decoration: none;
  transition: color var(--transition);
}

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

button {
  font-family: inherit;
  color: inherit;
  background: none;
  border: 0;
  cursor: pointer;
}

address {
  font-style: normal;
}

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

strong {
  font-weight: 600;
}

/* ---------- 3. 通用工具 ---------- */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  border: 0;
  clip-path: inset(50%);
  overflow: hidden;
  white-space: nowrap;
}

.skip-link {
  position: fixed;
  top: -100%;
  left: var(--space-sm);
  z-index: 1000;
  padding: 0.625rem 1.125rem;
  background: var(--color-clay);
  color: var(--color-cream);
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-decoration: none;
  box-shadow: var(--shadow-panel);
  transition: top 0.3s var(--ease-out);
}

.skip-link:focus-visible {
  top: var(--space-sm);
}

/* ---------- 4. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-height: 2.75rem;
  padding: 0.625rem 1.25rem;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  background: transparent;
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 600;
  line-height: 1.5;
  letter-spacing: 0.06em;
  text-decoration: none;
  color: var(--color-ink);
  cursor: pointer;
  transition:
    background var(--transition),
    color var(--transition),
    border-color var(--transition),
    box-shadow var(--transition),
    transform var(--transition);
}

.btn:hover {
  transform: scale(1.02);
}

.btn:active {
  transform: scale(0.98);
}

.btn:focus-visible {
  outline: 2px solid var(--color-clay);
  outline-offset: 2px;
}

.btn-primary {
  background: var(--color-clay);
  color: var(--color-cream);
  box-shadow: 0 6px 20px rgba(180, 95, 63, 0.3);
}

.btn-primary:hover {
  background: #c96a47;
  box-shadow: 0 10px 28px rgba(180, 95, 63, 0.36);
}

.btn-block {
  width: 100%;
}

/* ---------- 5. 品牌标志 ---------- */
.brand-mark {
  --brand-symbol-size: 2.5rem;
  display: inline-flex;
  flex-wrap: wrap;
  align-items: center;
  column-gap: 0.625rem;
  row-gap: 0.125rem;
  color: var(--color-cream);
  text-decoration: none;
  border-radius: var(--radius-sm);
}

.brand-mark__symbol {
  display: block;
  width: var(--brand-symbol-size);
  height: var(--brand-symbol-size);
  flex-shrink: 0;
  border-radius: var(--radius-sm);
}

.brand-mark__text {
  display: inline-flex;
  align-items: baseline;
  gap: 0.3125rem;
  font-family: var(--font-head);
  line-height: 1.15;
}

.brand-mark__cn {
  font-size: 1.4375rem;
  font-weight: 200;
  letter-spacing: -0.01em;
}

.brand-mark__en {
  font-size: 1rem;
  font-weight: 400;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-clay-light);
}

.brand-mark__tag {
  display: none;
  width: 100%;
  padding-left: calc(var(--brand-symbol-size) + 0.625rem);
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: rgba(245, 237, 227, 0.55);
}

/* ---------- 6. 头部 / 数据轨道 ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 50;
  display: flex;
  flex-direction: column;
  height: var(--header-h-mobile);
  background: rgba(43, 41, 38, 0.7);
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  border-bottom: 1px solid rgba(245, 237, 227, 0.1);
  color: var(--color-cream);
  transition: background 0.4s var(--ease-out), height 0.3s var(--ease-out);
}

.site-header[data-scrolled] {
  background: var(--color-ink);
}

.site-header[data-nav-open] {
  height: auto;
  max-height: 100dvh;
  overflow-y: auto;
  background: var(--color-ink);
}

.header-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-sm);
  flex-shrink: 0;
  height: var(--header-h-mobile);
  padding: 0 var(--space-md);
}

.nav-toggle {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: var(--radius-sm);
  color: var(--color-cream);
  transition: background var(--transition);
}

.nav-toggle:hover {
  background: rgba(245, 237, 227, 0.1);
}

.nav-toggle__bar {
  display: block;
  width: 20px;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
  transition: transform 0.3s var(--ease-out), opacity 0.3s var(--ease-out);
}

.site-header[data-nav-open] .nav-toggle__bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.site-header[data-nav-open] .nav-toggle__bar:nth-child(2) {
  opacity: 0;
}

.site-header[data-nav-open] .nav-toggle__bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.site-nav {
  display: none;
}

@media (max-width: 1024px) {
  .site-nav {
    padding: var(--space-xs) var(--space-md) var(--space-md);
  }

  .site-nav[data-open],
  .site-header[data-nav-open] .site-nav {
    display: block;
  }
}

.nav-list {
  display: flex;
  flex-direction: column;
  gap: 0.125rem;
}

.nav-item {
  margin: 0;
}

.nav-link {
  position: relative;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.8125rem 0.875rem;
  border-radius: var(--radius-sm);
  color: rgba(245, 237, 227, 0.7);
  text-decoration: none;
  transition:
    color var(--transition),
    background-color var(--transition),
    transform var(--transition);
}

.nav-link::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 3px;
  height: 0;
  transform: translateY(-50%);
  background: var(--color-clay);
  border-radius: 3px;
  transition: height 0.3s var(--ease-out);
}

.nav-link:hover {
  color: var(--color-cream);
  background: rgba(245, 237, 227, 0.06);
  transform: translateX(2px);
}

.nav-link[aria-current="page"] {
  color: var(--color-cream);
  background: rgba(245, 237, 227, 0.08);
}

.nav-link[aria-current="page"]::before {
  height: 60%;
}

.nav-link__index {
  min-width: 1.25rem;
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--color-clay-light);
}

.nav-link__label {
  font-size: 1rem;
  letter-spacing: 0.02em;
}

.header-bottom {
  position: relative;
  display: none;
  flex-direction: column;
  gap: var(--space-sm);
  margin-top: auto;
  padding: var(--space-md);
}

.site-header[data-nav-open] .header-bottom {
  display: flex;
}

.header-bottom::before {
  content: "";
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, var(--color-signal), var(--color-gold), transparent);
}

.console-status {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  margin: 0;
  padding: var(--space-sm);
  border: 1px solid rgba(245, 237, 227, 0.12);
  border-radius: var(--radius-sm);
  background: rgba(245, 237, 227, 0.04);
}

.console-status__dot {
  width: 8px;
  height: 8px;
  flex-shrink: 0;
  border-radius: 50%;
  background: var(--color-moss-light);
  box-shadow: 0 0 0 0 rgba(143, 169, 133, 0.6);
  animation: pulse-dot 2.4s ease-in-out infinite;
}

.console-status__label {
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(245, 237, 227, 0.6);
}

.console-status__value {
  flex-basis: 100%;
  margin-left: calc(0.5rem + 8px);
  font-size: 0.875rem;
  color: var(--color-cream);
}

@keyframes pulse-dot {
  0% {
    box-shadow: 0 0 0 0 rgba(143, 169, 133, 0.6);
  }
  70% {
    box-shadow: 0 0 0 8px rgba(143, 169, 133, 0);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(143, 169, 133, 0);
  }
}

/* ---------- 7. 主内容区 ---------- */
.site-main {
  flex: 1 0 auto;
  min-height: 100dvh;
  padding-top: var(--header-h-mobile);
}

.container {
  width: 100%;
  max-width: var(--content-max);
  margin: 0 auto;
  padding-left: clamp(1.5rem, 4vw, 4rem);
  padding-right: clamp(1.5rem, 4vw, 4rem);
}

/* ---------- 8. 分节与标题 ---------- */
.section {
  padding-top: clamp(3rem, 7vw, 6rem);
  padding-bottom: clamp(3rem, 7vw, 6rem);
}

.section-head {
  margin-bottom: clamp(2rem, 4vw, 3rem);
}

.section-index {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-clay);
}

.section-index::before {
  content: "";
  width: 2.25rem;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
}

.section-title {
  margin-top: var(--space-sm);
  font-family: var(--font-head);
  font-size: clamp(2rem, 5vw, 4rem);
  font-weight: 200;
  line-height: 1.12;
  letter-spacing: -0.02em;
  color: var(--color-ink);
}

.section-title--light {
  color: var(--color-cream);
}

.section-desc {
  max-width: 58ch;
  margin-top: var(--space-sm);
  color: var(--color-stone);
}

.lead {
  font-size: 1.125rem;
  line-height: 1.85;
  color: var(--color-ink);
}

/* ---------- 9. 面包屑 ---------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.25rem;
  margin-bottom: var(--space-md);
  padding: 0;
  font-size: 0.8125rem;
  line-height: 1.6;
  color: var(--color-stone);
}

.breadcrumb li {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
}

.breadcrumb li + li::before {
  content: "/";
  color: rgba(110, 103, 94, 0.55);
}

.breadcrumb a {
  color: var(--color-moss);
  text-decoration: none;
}

.breadcrumb a:hover {
  color: var(--color-moss-light);
}

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

/* ---------- 10. 卡片与网格 ---------- */
.card-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-md);
}

.card {
  display: flex;
  flex-direction: column;
  background: var(--color-panel);
  border: 1px solid rgba(43, 41, 38, 0.08);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  transition:
    transform var(--transition),
    box-shadow var(--transition),
    opacity var(--transition);
}

.card:hover {
  transform: translateY(-2px) scale(1.01);
  box-shadow: var(--shadow-panel);
}

.card[hidden] {
  display: none;
}

.card-body {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  flex: 1;
  padding: var(--space-md);
}

.card-title {
  font-family: var(--font-head);
  font-size: 1.25rem;
  font-weight: 400;
  line-height: 1.35;
  color: var(--color-ink);
}

.card-desc {
  color: var(--color-stone);
  font-size: 0.9375rem;
  line-height: 1.7;
}

.card-meta {
  margin-top: auto;
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-moss);
}

@media (min-width: 640px) {
  .card-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1025px) {
  .card-grid--3 {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* ---------- 11. 主题筛选 ---------- */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.filter-btn {
  padding: 0.4375rem 1.125rem;
  border: 1px solid var(--color-stone);
  border-radius: 999px;
  background: transparent;
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--color-stone);
  transition:
    color var(--transition),
    border-color var(--transition),
    background-color var(--transition),
    transform var(--transition);
}

.filter-btn:hover {
  border-color: var(--color-clay);
  color: var(--color-clay);
  transform: translateY(-1px);
}

.filter-btn[aria-pressed="true"] {
  background: var(--color-ink);
  border-color: var(--color-ink);
  color: var(--color-cream);
}

/* ---------- 12. 图片占位容器 ---------- */
.img-panel {
  position: relative;
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border-radius: var(--radius-md);
  background:
    linear-gradient(135deg, rgba(180, 95, 63, 0.25) 0%, rgba(30, 58, 95, 0.55) 100%),
    repeating-linear-gradient(45deg, rgba(245, 237, 227, 0.05) 0, rgba(245, 237, 227, 0.05) 1px, transparent 1px, transparent 9px),
    var(--color-ink);
}

.img-panel--wide {
  aspect-ratio: 21 / 9;
}

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

.img-panel--square {
  aspect-ratio: 1 / 1;
}

.img-panel__overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: flex-end;
  padding: var(--space-md);
  background: linear-gradient(to top, rgba(43, 41, 38, 0.72), transparent 55%);
  color: var(--color-cream);
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

/* ---------- 13. 数据装饰线 ---------- */
.deco-ticker {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: var(--color-stone);
}

.deco-line {
  flex: 1;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--color-signal), var(--color-gold), var(--color-deepblue));
  transform-origin: left;
  animation: line-grow 1.2s var(--ease-out) both;
}

@keyframes line-grow {
  from {
    transform: scaleX(0);
  }
  to {
    transform: scaleX(1);
  }
}

/* ---------- 14. 页脚 ---------- */
.site-footer {
  position: relative;
  margin-left: 0;
  background: var(--color-ink);
  color: var(--color-cream);
}

.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-signal), var(--color-gold), var(--color-deepblue), transparent);
  opacity: 0.7;
}

.footer-top {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.5rem, 4vw, 3rem);
  max-width: var(--content-max);
  margin: 0 auto;
  padding: clamp(3rem, 6vw, 5rem) clamp(1.5rem, 4vw, 4rem) clamp(2rem, 4vw, 3rem);
}

.footer-brand {
  max-width: 40ch;
}

.brand-mark--footer {
  --brand-symbol-size: 3rem;
}

.brand-mark--footer .brand-mark__cn {
  font-size: 1.75rem;
}

.brand-mark--footer .brand-mark__en {
  font-size: 1.125rem;
}

.footer-trust {
  margin-top: var(--space-md);
  color: rgba(245, 237, 227, 0.62);
  font-size: 0.9375rem;
  line-height: 1.75;
}

.footer-nav,
.footer-legal,
.footer-contact {
  min-width: 0;
}

.footer-heading {
  margin-bottom: var(--space-sm);
  font-family: var(--font-head);
  font-size: 0.75rem;
  font-weight: 200;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-clay-light);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
}

.footer-links a {
  display: inline-block;
  color: rgba(245, 237, 227, 0.72);
  text-decoration: none;
  transition:
    color var(--transition),
    padding-left var(--transition);
}

.footer-links a:hover {
  color: var(--color-cream);
  padding-left: 0.25rem;
}

.footer-contact__item {
  margin-bottom: var(--space-sm);
  color: rgba(245, 237, 227, 0.72);
  font-size: 0.875rem;
  line-height: 1.7;
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem 1.5rem;
  max-width: var(--content-max);
  margin: 0 auto;
  padding: var(--space-sm) clamp(1.5rem, 4vw, 4rem);
  border-top: 1px solid rgba(245, 237, 227, 0.1);
  font-size: 0.8125rem;
  color: rgba(245, 237, 227, 0.55);
}

.footer-copy,
.footer-icp {
  margin: 0;
}

@media (min-width: 640px) {
  .footer-top {
    grid-template-columns: 1fr 1fr;
  }

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

@media (min-width: 1025px) {
  .footer-top {
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: var(--space-lg);
  }

  .footer-brand {
    grid-column: auto;
  }
}

/* ---------- 15. 桌面端头部 / 侧轨 ---------- */
@media (min-width: 1025px) {
  .site-header {
    top: 0;
    right: auto;
    bottom: 0;
    left: 0;
    width: var(--rail-w);
    height: 100dvh;
    padding: var(--space-lg) var(--space-md) var(--space-md);
    border-bottom: 0;
    border-right: 1px solid rgba(245, 237, 227, 0.12);
    background: rgba(43, 41, 38, 0.55);
  }

  .site-header[data-scrolled] {
    background: var(--color-ink);
  }

  .site-header[data-nav-open] {
    max-height: none;
    overflow: visible;
  }

  .header-top {
    height: auto;
    flex-direction: column;
    align-items: flex-start;
    justify-content: flex-start;
    padding: 0;
  }

  .brand-mark__tag {
    display: block;
  }

  .nav-toggle {
    display: none;
  }

  .site-nav,
  .site-nav[data-open],
  .site-header[data-nav-open] .site-nav {
    display: flex;
    flex-direction: column;
    margin-top: var(--space-lg);
  }

  .header-bottom,
  .site-header[data-nav-open] .header-bottom {
    display: flex;
    padding: var(--space-sm) 0 0;
  }

  .site-main {
    padding-top: 0;
    margin-left: var(--rail-w);
  }

  .site-footer {
    margin-left: var(--rail-w);
  }
}

/* ---------- 16. 可访问性与动效降级 ---------- */
:focus-visible {
  outline: 2px solid var(--color-clay);
  outline-offset: 3px;
}

.site-header :focus-visible,
.site-footer :focus-visible {
  outline-color: var(--color-clay-light);
}

#main-content:focus-visible {
  outline: 2px solid var(--color-clay);
  outline-offset: -2px;
}

@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;
  }
}