@import url('https://fonts.googleapis.com/css2?family=Newsreader:wght@400;500;600;700&family=Roboto:wght@300;400;500;700&display=swap');

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

:root {
  --c-bg: #0D0D0D;
  --c-light: #F5F5F0;
  --c-gold: #C8A96E;
  --c-gold-dim: rgba(200,169,110,0.15);
  --c-gold-mid: rgba(200,169,110,0.4);
  --c-light-dim: rgba(245,245,240,0.6);
  --c-light-faint: rgba(245,245,240,0.08);
  --c-border: rgba(245,245,240,0.1);
  --c-border-gold: rgba(200,169,110,0.3);
  --nav-w: 220px;
  --font-serif: 'Newsreader', Georgia, 'Times New Roman', serif;
  --font-sans: 'Roboto', system-ui, -apple-system, sans-serif;
  --radius-sm: 4px;
  --radius-md: 8px;
  --transition: 0.3s cubic-bezier(0.4,0,0.2,1);
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body, .dark-body {
  background: var(--c-bg);
  color: var(--c-light);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  min-height: 100vh;
  overflow-x: hidden;
}

section {
  scroll-margin-top: 80px;
}

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

a {
  color: var(--c-gold);
  text-decoration: none;
  transition: color var(--transition), opacity var(--transition);
}
a:hover { color: var(--c-light); }

ul, menu { list-style: none; }

/* ===== 整体布局 ===== */
.site-shell {
  display: flex;
  min-height: 100vh;
  position: relative;
}

.page-body {
  margin-left: var(--nav-w);
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
}

/* ===== 左侧固定竖排导航（details > summary + menu > li > a） ===== */
.sidenav {
  position: fixed;
  left: 0;
  top: 0;
  width: var(--nav-w);
  height: 100vh;
  background: rgba(13,13,13,0.97);
  border-right: 1px solid var(--c-border);
  z-index: 100;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.sidenav[open] {
  display: flex;
}

.sidenav-summary {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  padding: 28px 20px 20px;
  border-bottom: 1px solid var(--c-border);
  cursor: default;
  list-style: none;
  gap: 16px;
}

.sidenav-summary::-webkit-details-marker { display: none; }

.nav-toggle-label {
  display: none;
}

.brand-mark {
  display: block;
  text-decoration: none;
}

.brand-text {
  font-family: var(--font-serif);
  font-size: 15px;
  font-weight: 700;
  color: var(--c-gold);
  letter-spacing: 0.03em;
  line-height: 1.3;
  display: block;
  word-break: break-all;
}

.brand-logo-img {
  max-width: 140px;
  height: auto;
}

.sidenav-menu {
  flex: 1;
  overflow-y: auto;
  padding: 16px 0 24px;
  scrollbar-width: thin;
  scrollbar-color: var(--c-border) transparent;
}

.sidenav-menu li {
  width: 100%;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 11px 20px;
  color: var(--c-light-dim);
  font-family: var(--font-sans);
  font-size: 13.5px;
  font-weight: 400;
  letter-spacing: 0.02em;
  text-decoration: none;
  transition: background var(--transition), color var(--transition), padding-left var(--transition);
  min-height: 44px;
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--c-gold);
  transform: scaleY(0);
  transition: transform var(--transition);
  transform-origin: bottom;
}

.nav-link:hover,
.nav-link:focus-visible {
  color: var(--c-light);
  background: var(--c-light-faint);
  padding-left: 26px;
}

.nav-link:hover::after,
.nav-link:focus-visible::after {
  transform: scaleY(1);
}

.nav-dot {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--c-gold);
  flex-shrink: 0;
  opacity: 0.5;
  transition: opacity var(--transition), transform var(--transition);
}

.nav-link:hover .nav-dot {
  opacity: 1;
  transform: scale(1.4);
}

.nav-text {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ===== main > div.wrap > section > article ===== */
main {
  flex: 1;
}

.wrap {
  width: 100%;
}

.content-section {
  width: 100%;
}

.content-article {
  width: 100%;
}

/* ===== Hero 区块 ===== */
.hero-block {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  padding: 0 60px;
}

.hero-grid-bg {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(200,169,110,0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(200,169,110,0.06) 1px, transparent 1px);
  background-size: 48px 48px;
  pointer-events: none;
}

.hero-grid-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 70% 70% at 30% 50%, transparent 40%, #0D0D0D 100%);
}

.hero-inner {
  position: relative;
  z-index: 1;
  max-width: 780px;
  padding: 80px 0;
}

.hero-eyebrow {
  font-family: var(--font-sans);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--c-gold);
  margin-bottom: 24px;
  overflow: hidden;
  white-space: nowrap;
  border-right: 2px solid var(--c-gold);
  animation: typing 2.4s steps(14) 0.3s both, blink-caret 0.75s step-end infinite 2.7s;
  width: 0;
  animation-fill-mode: forwards;
}

@keyframes typing {
  from { width: 0; }
  to { width: 100%; }
}

@keyframes blink-caret {
  from, to { border-color: transparent; }
  50% { border-color: var(--c-gold); }
}

.hero-h1 {
  font-family: var(--font-serif);
  font-size: clamp(2.6rem, 6vw, 5rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--c-light);
  margin-bottom: 28px;
  overflow: hidden;
}

.hero-h1-line {
  display: block;
  background: linear-gradient(135deg, var(--c-light) 0%, var(--c-gold) 60%, var(--c-light) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: slide-up 0.9s cubic-bezier(0.16,1,0.3,1) 0.5s both;
}

@keyframes slide-up {
  from { transform: translateY(110%); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

.hero-sub {
  font-family: var(--font-sans);
  font-size: 17px;
  font-weight: 300;
  color: var(--c-light-dim);
  line-height: 1.75;
  max-width: 560px;
  margin-bottom: 40px;
  animation: fade-in 0.8s ease 1.0s both;
}

.hero-cta {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  animation: fade-in 0.8s ease 1.2s both;
}

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

/* ===== 按钮 ===== */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 13px 28px;
  background: var(--c-gold);
  color: #0D0D0D;
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.05em;
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
  min-height: 46px;
}

.btn-primary:hover {
  background: var(--c-light);
  color: #0D0D0D;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(200,169,110,0.3);
}

.btn-ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 13px 28px;
  border: 1px solid var(--c-border-gold);
  color: var(--c-gold);
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.04em;
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: border-color var(--transition), color var(--transition), background var(--transition), transform var(--transition);
  min-height: 46px;
}

.btn-ghost:hover {
  border-color: var(--c-gold);
  background: var(--c-gold-dim);
  color: var(--c-light);
  transform: translateY(-2px);
}

/* ===== 正文内容体 ===== */
.content-body {
  padding: 0 60px 80px;
  max-width: 960px;
}

/* 正文内 section 样式（page.content 的各 section） */
.content-body section {
  padding: 80px 0 40px;
  border-top: 1px solid var(--c-border);
  position: relative;
}

.content-body section:first-child {
  border-top: none;
}

.content-body h2 {
  font-family: var(--font-serif);
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  font-weight: 700;
  color: var(--c-light);
  line-height: 1.25;
  margin-bottom: 24px;
  letter-spacing: -0.01em;
}

.content-body h2 span {
  display: inline-block;
  position: relative;
}

.content-body h2 span::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -4px;
  width: 100%;
  height: 2px;
  background: var(--c-gold);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.5s ease;
}

.content-body h2:hover span::after {
  transform: scaleX(1);
}

.content-body h3 {
  font-family: var(--font-serif);
  font-size: clamp(1.15rem, 2.2vw, 1.5rem);
  font-weight: 600;
  color: var(--c-gold);
  margin: 32px 0 14px;
  line-height: 1.35;
}

.content-body h3 span {
  display: inline-block;
}

.content-body p {
  font-size: 16px;
  line-height: 1.8;
  color: rgba(245,245,240,0.82);
  margin-bottom: 18px;
}

.content-body ul,
.content-body ol {
  padding-left: 20px;
  margin-bottom: 18px;
  list-style: disc;
}

.content-body ol {
  list-style: decimal;
}

.content-body li {
  color: rgba(245,245,240,0.8);
  font-size: 16px;
  line-height: 1.75;
  margin-bottom: 6px;
}

.content-body strong {
  color: var(--c-light);
  font-weight: 600;
}

.content-body em {
  color: var(--c-gold);
  font-style: normal;
}

.content-body a {
  color: var(--c-gold);
  border-bottom: 1px solid var(--c-border-gold);
  transition: color var(--transition), border-color var(--transition);
}

.content-body a:hover {
  color: var(--c-light);
  border-color: var(--c-light);
}

.content-body table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 24px;
  font-size: 15px;
}

.content-body th {
  background: var(--c-gold-dim);
  color: var(--c-gold);
  font-weight: 600;
  padding: 10px 14px;
  border: 1px solid var(--c-border-gold);
  text-align: left;
}

.content-body td {
  padding: 10px 14px;
  border: 1px solid var(--c-border);
  color: rgba(245,245,240,0.78);
}

.content-body blockquote {
  border-left: 3px solid var(--c-gold);
  padding: 14px 20px;
  background: var(--c-light-faint);
  margin: 24px 0;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.content-body blockquote p {
  color: var(--c-light-dim);
  font-style: italic;
  margin: 0;
}

/* ===== 卡片（正文内可能生成） ===== */
.content-body .card,
.content-body article {
  border-radius: var(--radius-sm);
  border-bottom: 3px solid var(--c-gold);
  background: rgba(245,245,240,0.03);
  padding: 20px 24px;
  transition: background var(--transition), transform var(--transition);
}

.content-body .card:hover,
.content-body article:hover {
  background: rgba(245,245,240,0.06);
  transform: translateY(-2px);
}

/* ===== 侧边栏 ===== */
.page-aside {
  position: fixed;
  right: 0;
  top: 0;
  width: 200px;
  height: 100vh;
  padding: 40px 20px 24px;
  border-left: 1px solid var(--c-border);
  background: rgba(13,13,13,0.96);
  z-index: 50;
  display: flex;
  flex-direction: column;
  gap: 0;
  overflow-y: auto;
}

.aside-inner {
  display: flex;
  flex-direction: column;
  gap: 20px;
  flex: 1;
}

.aside-title {
  font-family: var(--font-sans);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--c-gold);
  text-transform: uppercase;
  margin-bottom: 4px;
}

.aside-title span {
  display: inline-block;
}

.aside-nav-list {
  display: flex;
  flex-direction: column;
  gap: 2px;
  list-style: none;
}

.aside-link {
  display: block;
  font-size: 12px;
  color: rgba(245,245,240,0.5);
  padding: 7px 0;
  border-bottom: 1px solid transparent;
  transition: color var(--transition), border-color var(--transition), padding-left var(--transition);
  min-height: 32px;
  line-height: 1.4;
}

.aside-link:hover {
  color: var(--c-gold);
  border-color: var(--c-border-gold);
  padding-left: 6px;
}

.aside-brand-tag {
  margin-top: auto;
  padding-top: 20px;
  border-top: 1px solid var(--c-border);
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.aside-brand-name {
  font-family: var(--font-serif);
  font-size: 11px;
  font-weight: 700;
  color: var(--c-gold);
  word-break: break-all;
}

.aside-brand-sub {
  font-size: 10px;
  color: rgba(245,245,240,0.35);
  letter-spacing: 0.03em;
}

/* ===== 页脚（footer > div + nav + div） ===== */
.site-footer {
  margin-left: 0;
  border-top: 1px solid var(--c-border);
  background: rgba(6,6,6,0.98);
}

.footer-cta-block {
  padding: 80px 60px 60px;
  text-align: center;
  background: linear-gradient(135deg, rgba(200,169,110,0.06) 0%, transparent 60%);
  border-bottom: 1px solid var(--c-border);
}

.footer-cta-label {
  font-family: var(--font-sans);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--c-gold);
  text-transform: uppercase;
  margin-bottom: 12px;
}

.footer-cta-title {
  font-family: var(--font-serif);
  font-size: clamp(1.8rem, 4vw, 3rem);
  font-weight: 700;
  color: var(--c-light);
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.footer-cta-title span {
  display: inline-block;
  background: linear-gradient(135deg, var(--c-light), var(--c-gold));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.footer-cta-desc {
  color: var(--c-light-dim);
  font-size: 15px;
  margin-bottom: 32px;
  max-width: 460px;
  margin-left: auto;
  margin-right: auto;
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 20px 60px;
  flex-wrap: wrap;
}

.footer-bottom-logo .footer-brand {
  font-family: var(--font-serif);
  font-size: 14px;
  font-weight: 700;
  color: var(--c-gold);
}

.footer-bottom-logo img {
  max-height: 32px;
  width: auto;
}

.footer-bottom-nav {
  display: flex;
  gap: 0;
  flex-wrap: wrap;
  align-items: center;
}

.footer-bottom-nav a {
  color: rgba(245,245,240,0.45);
  font-size: 12px;
  padding: 8px 10px;
  transition: color var(--transition);
  min-height: 40px;
  display: inline-flex;
  align-items: center;
  text-decoration: none;
}

.footer-bottom-nav a:hover {
  color: var(--c-gold);
}

.footer-copyright {
  font-size: 12px;
  color: rgba(245,245,240,0.3);
  white-space: nowrap;
}

/* ===== 滚动动画 reveal ===== */
.reveal-fade,
.reveal-line {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s cubic-bezier(0.16,1,0.3,1);
}

.reveal-fade.visible,
.reveal-line.visible {
  opacity: 1;
  transform: none;
}

/* ===== 内容区与侧边栏共存时的宽度调整 ===== */
@media (min-width: 1200px) {
  .page-body {
    margin-right: 200px;
  }
}

/* ===== 响应式 ===== */
@media (max-width: 1199px) {
  .page-aside {
    display: none;
  }
}

@media (max-width: 900px) {
  :root {
    --nav-w: 0px;
  }

  .site-shell {
    flex-direction: column;
  }

  .sidenav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: auto;
    flex-direction: row;
    align-items: center;
    border-right: none;
    border-bottom: 1px solid var(--c-border);
    z-index: 200;
    overflow: visible;
  }

  .sidenav-summary {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    padding: 12px 20px;
    border-bottom: none;
    width: 100%;
    cursor: pointer;
  }

  .nav-toggle-label {
    display: flex;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 8px;
    min-height: 44px;
    justify-content: center;
  }

  .nav-toggle-label span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--c-gold);
    border-radius: 1px;
    transition: transform var(--transition), opacity var(--transition);
  }

  .sidenav-menu {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: rgba(13,13,13,0.99);
    border-bottom: 1px solid var(--c-border);
    padding: 8px 0 16px;
    max-height: 70vh;
    overflow-y: auto;
  }

  .sidenav:not([open]) .sidenav-menu {
    display: none;
  }

  .nav-link {
    min-height: 46px;
    font-size: 14px;
    padding: 12px 24px;
  }

  .page-body {
    margin-left: 0;
    padding-top: 60px;
  }

  .hero-block {
    padding: 0 24px;
    min-height: 100vh;
  }

  .hero-inner {
    padding: 60px 0;
  }

  .content-body {
    padding: 0 24px 60px;
  }

  .footer-bottom {
    padding: 20px 24px;
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }

  .footer-cta-block {
    padding: 60px 24px 48px;
  }

  .footer-bottom-nav {
    gap: 0;
  }
}

@media (max-width: 480px) {
  .hero-h1 {
    font-size: clamp(2rem, 10vw, 2.8rem);
  }

  .hero-cta {
    flex-direction: column;
  }

  .btn-primary,
  .btn-ghost {
    width: 100%;
    justify-content: center;
  }

  .content-body {
    padding: 0 16px 48px;
  }

  .content-body section {
    padding: 60px 0 32px;
  }
}

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

  .hero-eyebrow {
    animation: none;
    width: 100%;
    border-right: none;
  }

  .hero-h1-line {
    animation: none;
    transform: none;
    opacity: 1;
  }

  .hero-sub,
  .hero-cta {
    animation: none;
    opacity: 1;
    transform: none;
  }

  .reveal-fade,
  .reveal-line {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .nav-link,
  .btn-primary,
  .btn-ghost,
  .aside-link {
    transition: none;
  }
}