@import url('https://fonts.googleapis.com/css2?family=Cinzel:wght@400;500;600&family=Cormorant+Garamond:ital,wght@0,300;0,500;0,700;1,300;1,500&family=Crimson+Pro:ital,wght@0,300;0,400;0,600;1,300;1,400&display=swap');

/* ===== CSS 变量 ===== */
:root {
  --mint: #b4fde1;
  --ice: #add8e6;
  --dark: #172620;
  --mint-dark: #7de8bc;
  --ice-dark: #7bbdd4;
  --dark-mid: #1f3a2e;
  --dark-light: #2d5040;
  --white: #ffffff;
  --text-main: #172620;
  --text-muted: #3a5a4a;
  --radius-card: 28px;
  --radius-btn: 20px;
  --border-width: 3px;
  --shadow-clay: inset -2px -2px 8px rgba(0,0,0,0.12), 4px 4px 12px rgba(23,38,32,0.22);
  --shadow-clay-hover: inset -2px -2px 8px rgba(0,0,0,0.08), 6px 6px 18px rgba(23,38,32,0.32);
  --font-serif: 'Cormorant Garamond', 'Crimson Pro', 'Palatino Linotype', 'Book Antiqua', Georgia, serif;
  --font-display: 'Cinzel', 'Cormorant Garamond', serif;
  --transition: 200ms ease-out;
  --header-h: 64px;
  --anchor-h: 44px;
}

/* ===== 重置 ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + var(--anchor-h) + 8px);
  font-size: 17px;
  -webkit-text-size-adjust: 100%;
}
body {
  font-family: var(--font-serif);
  background: var(--dark);
  color: var(--text-main);
  line-height: 1.65;
  min-height: 100vh;
}

/* ===== 无障碍跳过 ===== */
.skip-link {
  position: absolute;
  top: -100px;
  left: 0;
  background: var(--mint);
  color: var(--dark);
  padding: 8px 16px;
  border-radius: 0 0 12px 0;
  z-index: 9999;
  font-size: 14px;
}
.skip-link:focus { top: 0; }

/* ===== 站点包裹 ===== */
.site-wrapper {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ===== 顶部导航 Header ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 900;
  height: var(--header-h);
  background: rgba(23, 38, 32, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 2px solid var(--mint-dark);
}
.header-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* Logo */
.logo-mark {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 14px;
  border: var(--border-width) solid var(--mint);
  background: linear-gradient(135deg, var(--mint) 0%, var(--ice) 100%);
  box-shadow: var(--shadow-clay);
  text-decoration: none;
  transition: box-shadow var(--transition), transform var(--transition);
  overflow: hidden;
  flex-shrink: 0;
}
.logo-mark:hover {
  box-shadow: var(--shadow-clay-hover);
  transform: translateY(-2px);
}
.nav-logo-img { width: 100%; height: 100%; object-fit: cover; display: block; }
.nav-logo-text {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 600;
  color: var(--dark);
}

/* 汉堡按钮 */
.burger-btn {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 48px;
  height: 48px;
  padding: 10px 12px;
  background: linear-gradient(135deg, var(--mint) 0%, var(--ice) 100%);
  border: var(--border-width) solid var(--mint-dark);
  border-radius: 14px;
  cursor: pointer;
  box-shadow: var(--shadow-clay);
  transition: box-shadow var(--transition), transform var(--transition);
}
.burger-btn:hover {
  box-shadow: var(--shadow-clay-hover);
  transform: translateY(-2px);
}
.burger-bar {
  display: block;
  height: 3px;
  background: var(--dark);
  border-radius: 2px;
  transition: transform 0.2s ease, opacity 0.2s ease;
}
.burger-btn[aria-expanded="true"] .burger-bar:nth-child(1) { transform: translateY(8px) rotate(45deg); }
.burger-btn[aria-expanded="true"] .burger-bar:nth-child(2) { opacity: 0; }
.burger-btn[aria-expanded="true"] .burger-bar:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }

/* ===== 全屏遮罩菜单 ===== */
.fullscreen-menu {
  position: fixed;
  inset: 0;
  z-index: 1000;
  background: rgba(23, 38, 32, 0.97);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}
.fullscreen-menu.is-open {
  opacity: 1;
  pointer-events: all;
}
.menu-close {
  position: absolute;
  top: 20px;
  right: 24px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: var(--border-width) solid var(--mint);
  background: linear-gradient(135deg, var(--mint) 0%, var(--ice) 100%);
  color: var(--dark);
  font-size: 20px;
  cursor: pointer;
  box-shadow: var(--shadow-clay);
  transition: box-shadow var(--transition), transform var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
}
.menu-close:hover {
  box-shadow: var(--shadow-clay-hover);
  transform: scale(1.1);
}
.fullscreen-nav ol {
  list-style: none;
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding: 0;
  counter-reset: nav-counter;
}
.fullscreen-nav li {
  counter-increment: nav-counter;
  opacity: 0;
  transform: translateY(20px);
}
.fullscreen-menu.is-open .fullscreen-nav li {
  opacity: 1;
  transform: translateY(0);
}
.fullscreen-menu.is-open .fullscreen-nav li:nth-child(1) { transition: opacity 0.4s ease 0.05s, transform 0.4s cubic-bezier(0.34,1.56,0.64,1) 0.05s; }
.fullscreen-menu.is-open .fullscreen-nav li:nth-child(2) { transition: opacity 0.4s ease 0.10s, transform 0.4s cubic-bezier(0.34,1.56,0.64,1) 0.10s; }
.fullscreen-menu.is-open .fullscreen-nav li:nth-child(3) { transition: opacity 0.4s ease 0.15s, transform 0.4s cubic-bezier(0.34,1.56,0.64,1) 0.15s; }
.fullscreen-menu.is-open .fullscreen-nav li:nth-child(4) { transition: opacity 0.4s ease 0.20s, transform 0.4s cubic-bezier(0.34,1.56,0.64,1) 0.20s; }
.fullscreen-menu.is-open .fullscreen-nav li:nth-child(5) { transition: opacity 0.4s ease 0.25s, transform 0.4s cubic-bezier(0.34,1.56,0.64,1) 0.25s; }
.fullscreen-menu.is-open .fullscreen-nav li:nth-child(6) { transition: opacity 0.4s ease 0.30s, transform 0.4s cubic-bezier(0.34,1.56,0.64,1) 0.30s; }
.fullscreen-menu.is-open .fullscreen-nav li:nth-child(7) { transition: opacity 0.4s ease 0.35s, transform 0.4s cubic-bezier(0.34,1.56,0.64,1) 0.35s; }
.nav-link {
  display: inline-block;
  font-family: var(--font-display);
  font-size: clamp(22px, 4vw, 36px);
  font-weight: 500;
  color: var(--mint);
  text-decoration: none;
  padding: 10px 32px;
  border-radius: var(--radius-btn);
  border: 2px solid transparent;
  letter-spacing: 0.04em;
  transition: background var(--transition), color var(--transition), border-color var(--transition), box-shadow var(--transition);
}
.nav-link::before {
  content: counter(nav-counter, decimal-leading-zero) "  ";
  font-size: 0.55em;
  opacity: 0.55;
  font-family: var(--font-serif);
  vertical-align: middle;
}
.nav-link:hover {
  background: linear-gradient(135deg, var(--mint) 0%, var(--ice) 100%);
  color: var(--dark);
  border-color: var(--mint-dark);
  box-shadow: var(--shadow-clay);
}

/* ===== 粘性锚点条 ===== */
.anchor-bar {
  position: sticky;
  top: var(--header-h);
  z-index: 800;
  height: var(--anchor-h);
  background: linear-gradient(90deg, var(--dark-mid) 0%, var(--dark-light) 100%);
  border-bottom: 2px solid var(--mint-dark);
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 0 16px;
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
}
.anchor-bar::-webkit-scrollbar { display: none; }
.anchor-link {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  height: 32px;
  padding: 0 14px;
  font-family: var(--font-serif);
  font-size: 14px;
  color: var(--mint);
  text-decoration: none;
  border-radius: 16px;
  border: 2px solid transparent;
  transition: background var(--transition), border-color var(--transition), color var(--transition);
  white-space: nowrap;
}
.anchor-link:hover {
  background: rgba(180, 253, 225, 0.15);
  border-color: var(--mint);
  color: var(--white);
}

/* ===== Hero ===== */
.hero-section {
  position: relative;
  width: 100%;
  height: 100vh;
  min-height: 560px;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  overflow: hidden;
  padding-top: calc(var(--header-h) + var(--anchor-h));
}
.hero-media {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.hero-bg-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  display: block;
}
.hero-mask {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    110deg,
    rgba(23,38,32,0.7) 0%,
    rgba(23,38,32,0.3) 45%,
    rgba(23,38,32,0.75) 100%
  );
}
/* 无图时 hero 背景 */
.hero-section:not(:has(.hero-bg-img)) {
  background: linear-gradient(135deg, var(--dark) 0%, var(--dark-light) 60%, var(--dark-mid) 100%);
}
.hero-content {
  position: relative;
  z-index: 2;
  max-width: 560px;
  padding: 48px 48px 48px 24px;
  text-align: right;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 20px;
}
.hero-badge {
  display: inline-block;
  background: linear-gradient(135deg, var(--mint) 0%, var(--ice) 100%);
  color: var(--dark);
  font-family: var(--font-serif);
  font-size: 14px;
  font-weight: 600;
  padding: 6px 18px;
  border-radius: 20px;
  border: var(--border-width) solid var(--mint-dark);
  box-shadow: var(--shadow-clay);
  letter-spacing: 0.06em;
}
.hero-h1 {
  font-family: var(--font-display);
  font-size: clamp(32px, 6vw, 68px);
  font-weight: 600;
  color: var(--mint);
  line-height: 1.15;
  letter-spacing: 0.02em;
  text-shadow: 0 2px 24px rgba(0,0,0,0.5);
}
.hero-sub {
  font-size: clamp(16px, 2vw, 20px);
  color: rgba(180,253,225,0.85);
  line-height: 1.6;
  max-width: 420px;
}
.clay-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 14px 32px;
  background: linear-gradient(135deg, var(--mint) 0%, var(--ice) 100%);
  color: var(--dark);
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 600;
  border-radius: var(--radius-btn);
  border: var(--border-width) solid var(--mint-dark);
  box-shadow: var(--shadow-clay);
  text-decoration: none;
  cursor: pointer;
  transition: box-shadow var(--transition), transform var(--transition), background var(--transition);
  letter-spacing: 0.03em;
  min-height: 48px;
}
.clay-btn:hover {
  box-shadow: var(--shadow-clay-hover);
  transform: translateY(-3px);
  background: linear-gradient(135deg, var(--ice) 0%, var(--mint) 100%);
}
.clay-btn:active {
  transform: translateY(0);
  box-shadow: inset -1px -1px 4px rgba(0,0,0,0.18), 2px 2px 6px rgba(23,38,32,0.2);
}

/* ===== 主体 main ===== */
.site-main {
  flex: 1;
  background: linear-gradient(180deg, var(--dark-mid) 0%, var(--dark) 100%);
}
.main-article {
  max-width: 1280px;
  margin: 0 auto;
  padding: 56px 24px 80px;
}
.content-section {
  width: 100%;
}
.content-with-aside {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 40px;
  align-items: start;
}
.content-body {
  min-width: 0;
  color: rgba(180,253,225,0.92);
}

/* ===== 正文内容样式 ===== */
.content-body h2 {
  font-family: var(--font-display);
  font-size: clamp(22px, 3vw, 32px);
  font-weight: 600;
  color: var(--mint);
  margin: 48px 0 8px;
  letter-spacing: 0.03em;
}
.content-body h2 + hr,
.content-body h3 + hr {
  border: none;
  border-top: 2px solid var(--mint-dark);
  margin: 0 0 20px;
  opacity: 0.45;
}
.content-body h3 {
  font-family: var(--font-display);
  font-size: clamp(18px, 2.2vw, 24px);
  font-weight: 500;
  color: var(--ice);
  margin: 36px 0 8px;
  letter-spacing: 0.02em;
}
.content-body h4 {
  font-size: 18px;
  font-weight: 600;
  color: var(--mint);
  margin: 24px 0 8px;
}
.content-body p {
  font-size: 17px;
  line-height: 1.75;
  margin-bottom: 16px;
  color: rgba(180,253,225,0.88);
}
.content-body a {
  color: var(--ice);
  text-decoration: underline;
  text-decoration-color: rgba(173,216,230,0.5);
  text-underline-offset: 3px;
  transition: color var(--transition);
}
.content-body a:hover { color: var(--mint); }
.content-body ul,
.content-body ol {
  margin: 12px 0 20px 24px;
  color: rgba(180,253,225,0.88);
  font-size: 17px;
  line-height: 1.75;
}
.content-body li { margin-bottom: 6px; }
.content-body blockquote {
  margin: 24px 0;
  padding: 18px 24px;
  background: rgba(180,253,225,0.07);
  border-left: 4px solid var(--mint);
  border-radius: 0 12px 12px 0;
  font-style: italic;
  color: rgba(180,253,225,0.8);
}
.content-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0;
  font-size: 15px;
}
.content-body th {
  background: rgba(180,253,225,0.12);
  color: var(--mint);
  padding: 10px 14px;
  text-align: left;
  border-bottom: 2px solid var(--mint-dark);
  font-family: var(--font-display);
  letter-spacing: 0.03em;
}
.content-body td {
  padding: 9px 14px;
  border-bottom: 1px solid rgba(180,253,225,0.1);
  color: rgba(180,253,225,0.82);
}
.content-body tr:hover td { background: rgba(180,253,225,0.04); }
.content-body img {
  max-width: 100%;
  height: auto;
  border-radius: 16px;
  border: var(--border-width) solid var(--mint-dark);
  box-shadow: var(--shadow-clay);
  margin: 16px 0;
}
.content-body strong { color: var(--mint); font-weight: 700; }
.content-body em { color: var(--ice); font-style: italic; }
.content-body hr {
  border: none;
  border-top: 2px solid var(--mint-dark);
  margin: 32px 0;
  opacity: 0.35;
}
.content-body section {
  margin-bottom: 48px;
  padding-bottom: 24px;
  border-bottom: 1px solid rgba(180,253,225,0.08);
}
.content-body section:last-child {
  border-bottom: none;
}

/* Section scroll-margin for sticky header */
.content-body section[id] {
  scroll-margin-top: calc(var(--header-h) + var(--anchor-h) + 12px);
}

/* ===== 侧边栏 aside ===== */
.content-aside {
  display: flex;
  flex-direction: column;
  gap: 24px;
  position: sticky;
  top: calc(var(--header-h) + var(--anchor-h) + 20px);
}
.clay-card {
  background: linear-gradient(135deg, rgba(180,253,225,0.10) 0%, rgba(173,216,230,0.10) 100%);
  border: var(--border-width) solid var(--mint-dark);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-clay);
  padding: 24px;
  transition: box-shadow var(--transition);
}
.clay-card:hover { box-shadow: var(--shadow-clay-hover); }
.aside-title {
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 600;
  color: var(--mint);
  margin-bottom: 8px;
  letter-spacing: 0.04em;
}
.aside-card hr {
  border: none;
  border-top: 2px solid var(--mint-dark);
  margin: 0 0 16px;
  opacity: 0.4;
}
.aside-nav-list {
  list-style: none;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
  counter-reset: aside-counter;
}
.aside-nav-list li { counter-increment: aside-counter; }
.aside-link {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border-radius: 12px;
  color: rgba(180,253,225,0.82);
  text-decoration: none;
  font-size: 15px;
  border: 1px solid transparent;
  transition: background var(--transition), border-color var(--transition), color var(--transition);
  min-height: 40px;
}
.aside-link::before {
  content: counter(aside-counter, decimal-leading-zero);
  font-size: 11px;
  opacity: 0.5;
  font-family: var(--font-serif);
  flex-shrink: 0;
}
.aside-link:hover {
  background: rgba(180,253,225,0.12);
  border-color: var(--mint-dark);
  color: var(--mint);
}
.aside-tip p {
  font-size: 14px;
  color: rgba(180,253,225,0.72);
  line-height: 1.6;
}

/* ===== 页脚 ===== */
.site-footer {
  background: var(--dark);
  border-top: 3px solid var(--mint-dark);
  padding: 0;
  text-align: center;
}
.footer-cta {
  padding: 40px 24px 24px;
}
.footer-cta-link {
  font-size: 18px;
}
.footer-copy {
  display: block;
  padding: 16px 24px 24px;
  font-size: 13px;
  color: rgba(180,253,225,0.45);
  font-family: var(--font-serif);
  border-top: 1px solid rgba(180,253,225,0.1);
}

/* ===== 动效 - prefers-reduced-motion ===== */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; animation: none !important; }
  html { scroll-behavior: auto; }
  .fullscreen-menu.is-open .fullscreen-nav li { opacity: 1 !important; transform: none !important; transition: none !important; }
}

/* ===== 响应式 ===== */
@media (max-width: 900px) {
  .content-with-aside {
    grid-template-columns: 1fr;
  }
  .content-aside {
    position: static;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
  }
}
@media (max-width: 600px) {
  .hero-content {
    padding: 32px 20px 32px 20px;
    max-width: 100%;
    text-align: right;
    align-items: flex-end;
  }
  .hero-h1 { font-size: clamp(28px, 8vw, 44px); }
  .main-article { padding: 36px 16px 60px; }
  .content-aside {
    grid-template-columns: 1fr;
  }
  .anchor-bar { padding: 0 12px; gap: 2px; }
  .anchor-link { font-size: 13px; padding: 0 10px; }
  .content-body h2 { font-size: 20px; }
  .content-body h3 { font-size: 17px; }
  .clay-btn { padding: 12px 24px; font-size: 16px; }
}
@media (max-width: 375px) {
  .hero-content { padding: 24px 14px; }
  .hero-badge { font-size: 12px; padding: 5px 12px; }
}