@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');

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

:root {
  --c-black: #000000;
  --c-white: #ffffff;
  --c-ink: #000000;
  --c-gray-100: #f5f5f5;
  --c-gray-200: #e8e8e8;
  --c-gray-400: #999999;
  --c-gray-600: #555555;
  --font-heading: 'Cormorant Garamond', 'Cinzel', 'Crimson Pro', 'SimSun', serif;
  --font-body: 'Crimson Pro', 'Cormorant Garamond', 'SimSun', 'STSong', Georgia, serif;
  --font-mono: 'Cinzel', monospace;
  --max-w: 1200px;
  --header-h: 96px;
  --transition: 220ms ease;
}

html {
  font-size: 18px;
  line-height: 1.65;
  color: var(--c-black);
  background: var(--c-white);
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

a {
  color: inherit;
  text-decoration: none;
}

/* ─── 顶部导航（两行结构：品牌行 + 菜单行） ─── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--c-black);
  color: var(--c-white);
  border-bottom: 2px solid var(--c-white);
}

.brand-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0.75rem 1.5rem;
  gap: 1rem;
  border-bottom: 1px solid rgba(255,255,255,0.15);
}

.brand-link {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-heading);
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--c-white);
  text-transform: uppercase;
  transition: opacity var(--transition);
}

.brand-link:hover {
  opacity: 0.75;
}

.site-logo-img {
  height: 32px;
  width: auto;
}

.brand-name {
  white-space: nowrap;
}

.header-search {
  display: flex;
  align-items: center;
  gap: 0;
  border: 1px solid rgba(255,255,255,0.4);
}

.search-input {
  background: transparent;
  border: none;
  color: var(--c-white);
  font-family: var(--font-body);
  font-size: 0.9rem;
  padding: 0.45rem 0.75rem;
  width: 200px;
  outline: none;
}

.search-input::placeholder {
  color: rgba(255,255,255,0.45);
}

.search-btn {
  background: var(--c-white);
  color: var(--c-black);
  border: none;
  font-family: var(--font-heading);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  padding: 0.45rem 0.9rem;
  cursor: pointer;
  min-height: 40px;
  transition: background var(--transition), color var(--transition);
}

.search-btn:hover {
  background: var(--c-gray-200);
}

.menu-row {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0;
  overflow-x: auto;
  scrollbar-width: none;
}

.menu-row::-webkit-scrollbar { display: none; }

.nav-link {
  display: inline-block;
  font-family: var(--font-body);
  font-size: 0.88rem;
  color: rgba(255,255,255,0.75);
  padding: 0.65rem 1rem;
  border-right: 1px solid rgba(255,255,255,0.12);
  white-space: nowrap;
  min-height: 44px;
  line-height: 1.8;
  transition: color var(--transition), background var(--transition);
  letter-spacing: 0.02em;
}

.nav-link:first-child {
  padding-left: 0;
}

.nav-link:hover,
.nav-link--active {
  color: var(--c-white);
  background: rgba(255,255,255,0.08);
}

/* ─── 页面包裹 ─── */
.page-wrap {
  flex: 1;
  width: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ─── 通用眉题 / 标题装饰 ─── */
.eyebrow {
  display: block;
  font-family: var(--font-heading);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--c-gray-600);
  margin-bottom: 0.4rem;
}

.block-heading {
  font-family: var(--font-heading);
  font-size: 1.55rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  border-bottom: 2px solid var(--c-black);
  padding-bottom: 0.35rem;
  margin-bottom: 1.5rem;
}

/* ─── 子页表格列表 ─── */
.child-table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 2rem;
}

.child-row {
  border-bottom: 1px solid var(--c-gray-200);
  transition: background var(--transition);
}

.child-row:hover {
  background: var(--c-gray-100);
}

.child-td-num {
  font-family: var(--font-heading);
  font-size: 0.78rem;
  font-weight: 300;
  letter-spacing: 0.08em;
  color: var(--c-gray-400);
  padding: 1rem 1rem 1rem 0;
  width: 3rem;
  vertical-align: top;
}

.child-td-main {
  padding: 0.85rem 1rem 0.85rem 0;
  vertical-align: top;
}

.child-td-arrow {
  font-size: 1rem;
  color: var(--c-gray-400);
  padding: 0.85rem 0;
  width: 2rem;
  text-align: right;
  vertical-align: middle;
  transition: color var(--transition), transform var(--transition);
}

.child-row:hover .child-td-arrow {
  color: var(--c-black);
  transform: translateX(3px);
}

.child-td-date {
  font-size: 0.78rem;
  color: var(--c-gray-400);
  padding: 0.85rem 0;
  width: 7rem;
  text-align: right;
  vertical-align: middle;
  white-space: nowrap;
}

.child-link {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.child-title {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 500;
  color: var(--c-black);
  transition: opacity var(--transition);
}

.child-row:hover .child-title {
  opacity: 0.7;
}

.child-desc {
  font-size: 0.85rem;
  color: var(--c-gray-600);
  line-height: 1.4;
}

/* ─── 交错动画 ─── */
@media (prefers-reduced-motion: no-preference) {
  .stagger-item {
    opacity: 0;
    transform: translateY(12px);
    animation: stagger-in 400ms ease forwards;
    animation-delay: calc(var(--i, 0) * 70ms + 100ms);
  }

  @keyframes stagger-in {
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }
}

/* ─── 首页 Hero ─── */
.main-home {
  padding: 0;
}

.home-article {
  padding: 0;
}

.hero-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  min-height: 100vh;
  border-bottom: 2px solid var(--c-black);
  margin: 0 -1.5rem;
}

.hero-media {
  overflow: hidden;
  background: var(--c-gray-100);
  border-right: 2px solid var(--c-black);
}

.hero-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-placeholder {
  width: 100%;
  height: 100%;
  background: var(--c-black);
}

.hero-text {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 4rem 3rem;
  text-align: center;
  gap: 1.5rem;
}

.hero-h1 {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 4vw, 3.5rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: 0.02em;
}

.hero-lead {
  font-size: 1.05rem;
  color: var(--c-gray-600);
  max-width: 28ch;
  line-height: 1.7;
}

.hero-cta {
  display: inline-block;
  background: var(--c-black);
  color: var(--c-white);
  font-family: var(--font-heading);
  font-size: 0.88rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  padding: 0.85rem 2.5rem;
  min-height: 44px;
  border: 2px solid var(--c-black);
  transition: background var(--transition), color var(--transition);
}

.hero-cta:hover {
  background: var(--c-white);
  color: var(--c-black);
}

.content-block {
  padding: 3rem 0 2rem;
  max-width: 72ch;
}

.index-block {
  padding: 2.5rem 0;
  border-top: 1px solid var(--c-gray-200);
}

/* ─── Feature 页 ─── */
.main-feature {
  padding: 0;
}

.feature-article {
  padding: 0;
}

.feature-banner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  min-height: 50vh;
  border-bottom: 2px solid var(--c-black);
  margin: 0 -1.5rem;
}

.feature-banner-img {
  overflow: hidden;
  background: var(--c-gray-100);
  border-right: 2px solid var(--c-black);
}

.feature-hero-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.feature-banner-text {
  padding: 3rem 2.5rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 0.75rem;
}

.feature-h1 {
  font-family: var(--font-heading);
  font-size: clamp(1.6rem, 3vw, 2.8rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: 0.02em;
}

.feature-lead {
  font-size: 1rem;
  color: var(--c-gray-600);
  line-height: 1.65;
}

.feature-content {
  padding: 3rem 0 2rem;
  max-width: 72ch;
  border-bottom: 1px solid var(--c-gray-200);
}

.feature-children,
.feature-related {
  padding: 2.5rem 0;
  border-bottom: 1px solid var(--c-gray-200);
}

/* ─── Guide 页 ─── */
.main-guide {
  padding: 0;
}

.guide-article {
  padding: 0;
}

.guide-header {
  padding: 3rem 0 2rem;
  border-bottom: 2px solid var(--c-black);
  max-width: 72ch;
}

.guide-h1 {
  font-family: var(--font-heading);
  font-size: clamp(1.6rem, 3vw, 2.6rem);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 0.5rem;
}

.guide-meta {
  display: flex;
  gap: 1.5rem;
  margin-top: 0.5rem;
}

.guide-hero-wrap {
  margin-top: 1.5rem;
}

.guide-hero-img {
  width: 100%;
  max-height: 320px;
  object-fit: cover;
}

.guide-content {
  padding: 3rem 0 2rem;
  max-width: 72ch;
  border-bottom: 1px solid var(--c-gray-200);
}

.guide-related {
  padding: 2.5rem 0;
  border-bottom: 1px solid var(--c-gray-200);
}

.guide-nav-links {
  padding: 2rem 0;
  display: flex;
  gap: 1.5rem;
}

/* ─── FAQ 页 ─── */
.main-faq {
  padding: 0;
}

.faq-article {
  padding: 0;
}

.faq-header {
  padding: 3rem 0 2rem;
  border-bottom: 2px solid var(--c-black);
  max-width: 72ch;
}

.faq-h1 {
  font-family: var(--font-heading);
  font-size: clamp(1.6rem, 3vw, 2.6rem);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 0.5rem;
}

.faq-lead {
  color: var(--c-gray-600);
  font-size: 1rem;
}

.faq-content {
  padding: 3rem 0 2rem;
  max-width: 72ch;
  border-bottom: 1px solid var(--c-gray-200);
}

.faq-guides {
  padding: 2.5rem 0;
  border-bottom: 1px solid var(--c-gray-200);
}

.faq-nav-links {
  padding: 2rem 0;
  display: flex;
  gap: 1.5rem;
}

/* ─── About 页 ─── */
.main-about {
  padding: 0;
}

.about-article {
  padding: 0;
}

.about-header {
  padding: 3rem 0 2rem;
  border-bottom: 2px solid var(--c-black);
  max-width: 72ch;
}

.about-logo-wrap {
  margin-bottom: 1.5rem;
}

.about-logo {
  height: 56px;
  width: auto;
}

.about-h1 {
  font-family: var(--font-heading);
  font-size: clamp(1.6rem, 3vw, 2.6rem);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 0.5rem;
}

.about-content {
  padding: 3rem 0 2rem;
  max-width: 72ch;
  border-bottom: 1px solid var(--c-gray-200);
}

.about-index {
  padding: 2.5rem 0;
  border-bottom: 1px solid var(--c-gray-200);
}

.about-links {
  padding: 2rem 0;
  display: flex;
  gap: 1.5rem;
}

/* ─── Privacy 页 ─── */
.main-privacy {
  padding: 0;
}

.privacy-article {
  padding: 0;
}

.privacy-header {
  padding: 3rem 0 2rem;
  border-bottom: 2px solid var(--c-black);
  max-width: 72ch;
}

.privacy-h1 {
  font-family: var(--font-heading);
  font-size: clamp(1.6rem, 3vw, 2.6rem);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 0.5rem;
}

.privacy-meta {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
  margin-top: 0.4rem;
}

.privacy-content {
  padding: 3rem 0 2rem;
  max-width: 72ch;
  border-bottom: 1px solid var(--c-gray-200);
}

.privacy-links {
  padding: 2rem 0;
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
}

/* ─── 通用日期 / 返回链接 ─── */
.page-date,
.page-date-mod {
  font-size: 0.8rem;
  color: var(--c-gray-400);
  letter-spacing: 0.03em;
}

.back-link {
  display: inline-block;
  font-family: var(--font-heading);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  border-bottom: 1px solid var(--c-black);
  padding-bottom: 0.1rem;
  color: var(--c-black);
  transition: opacity var(--transition);
  min-height: 40px;
  line-height: 2.5;
}

.back-link:hover {
  opacity: 0.5;
}

/* ─── 正文内容区排版 ─── */
.content-block p,
.feature-content p,
.guide-content p,
.faq-content p,
.about-content p,
.privacy-content p {
  margin-bottom: 1.2rem;
  font-size: 1rem;
  line-height: 1.75;
  color: var(--c-ink);
}

.content-block h2,
.feature-content h2,
.guide-content h2,
.faq-content h2,
.about-content h2,
.privacy-content h2 {
  font-family: var(--font-heading);
  font-size: 1.35rem;
  font-weight: 700;
  margin: 2rem 0 0.75rem;
  letter-spacing: 0.02em;
}

.content-block h3,
.feature-content h3,
.guide-content h3,
.faq-content h3,
.about-content h3,
.privacy-content h3 {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 600;
  margin: 1.5rem 0 0.5rem;
}

.content-block ul,
.content-block ol,
.feature-content ul,
.feature-content ol,
.guide-content ul,
.guide-content ol,
.faq-content ul,
.faq-content ol,
.about-content ul,
.about-content ol,
.privacy-content ul,
.privacy-content ol {
  margin: 0.75rem 0 1.2rem 1.5rem;
  line-height: 1.75;
}

.content-block li,
.feature-content li,
.guide-content li,
.faq-content li,
.about-content li,
.privacy-content li {
  margin-bottom: 0.3rem;
}

.content-block a,
.feature-content a,
.guide-content a,
.faq-content a,
.about-content a,
.privacy-content a {
  border-bottom: 1px solid currentColor;
  transition: opacity var(--transition);
}

.content-block a:hover,
.feature-content a:hover,
.guide-content a:hover,
.faq-content a:hover,
.about-content a:hover,
.privacy-content a:hover {
  opacity: 0.6;
}

.content-block table,
.feature-content table,
.guide-content table,
.faq-content table,
.about-content table,
.privacy-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  font-size: 0.95rem;
}

.content-block th,
.content-block td,
.feature-content th,
.feature-content td,
.guide-content th,
.guide-content td,
.faq-content th,
.faq-content td,
.about-content th,
.about-content td,
.privacy-content th,
.privacy-content td {
  border: 1px solid var(--c-gray-200);
  padding: 0.6rem 0.9rem;
  text-align: left;
}

.content-block th,
.feature-content th,
.guide-content th,
.faq-content th,
.about-content th,
.privacy-content th {
  background: var(--c-black);
  color: var(--c-white);
  font-family: var(--font-heading);
  font-weight: 600;
  letter-spacing: 0.05em;
}

/* ─── 页脚 ─── */
.site-footer {
  background: var(--c-black);
  color: var(--c-white);
  margin-top: auto;
  border-top: 2px solid var(--c-black);
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 3rem 1.5rem 2rem;
  gap: 2rem;
  border-bottom: 1px solid rgba(255,255,255,0.15);
}

.footer-col {
  display: block;
}

.footer-dt {
  font-family: var(--font-heading);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.45);
  margin-bottom: 1rem;
  display: block;
}

.footer-dd {
  display: block;
  margin: 0 0 0.5rem;
}

.footer-link {
  font-size: 0.9rem;
  color: rgba(255,255,255,0.7);
  display: inline-block;
  min-height: 40px;
  line-height: 2.2;
  transition: color var(--transition);
}

.footer-link:hover {
  color: var(--c-white);
}

.footer-bottom {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 1.25rem 1.5rem;
  text-align: center;
}

.footer-copy {
  font-size: 0.8rem;
  color: rgba(255,255,255,0.4);
  letter-spacing: 0.04em;
  line-height: 1.6;
}

/* ─── 响应式 ─── */
@media (max-width: 900px) {
  .hero-block,
  .feature-banner {
    grid-template-columns: 1fr;
    min-height: auto;
  }

  .hero-media,
  .feature-banner-img {
    height: 50vw;
    border-right: none;
    border-bottom: 2px solid var(--c-black);
  }

  .hero-text {
    padding: 2.5rem 1.5rem;
  }

  .feature-banner-text {
    padding: 2rem 0;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
  }
}

@media (max-width: 640px) {
  :root {
    --max-w: 100%;
  }

  html {
    font-size: 17px;
  }

  .brand-row {
    padding: 0.6rem 1rem;
    gap: 0.75rem;
  }

  .search-input {
    width: 120px;
  }

  .menu-row {
    padding: 0 1rem;
  }

  .nav-link {
    padding: 0.6rem 0.7rem;
    font-size: 0.82rem;
  }

  .page-wrap {
    padding: 0 1rem;
  }

  .hero-block,
  .feature-banner {
    margin: 0 -1rem;
  }

  .hero-text {
    padding: 2rem 1rem;
    gap: 1rem;
  }

  .hero-h1 {
    font-size: 1.75rem;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    padding: 2rem 1rem 1.5rem;
    gap: 1.25rem;
  }

  .footer-bottom {
    padding: 1rem;
  }

  .child-td-date {
    display: none;
  }

  .guide-meta {
    flex-direction: column;
    gap: 0.25rem;
  }

  .back-link {
    font-size: 0.8rem;
  }
}

@media (max-width: 375px) {
  .brand-name {
    font-size: 1rem;
  }

  .hero-h1 {
    font-size: 1.5rem;
  }

  .search-input {
    width: 90px;
  }
}