@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;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  background: #000;
  color: #fff;
}

body {
  font-family: 'Roboto', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  font-size: 1rem;
  line-height: 1.7;
  background: #000;
  color: #fff;
  overflow-x: hidden;
}

body.menu-open {
  overflow: hidden;
}

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

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

a:hover {
  text-decoration: underline;
  text-underline-offset: 3px;
}

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

/* ── 顶部导航 ── */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 2rem;
  height: 64px;
  background: #000;
  border-bottom: 1px solid #222;
}

.brand-logo {
  display: flex;
  align-items: center;
  text-decoration: none;
  flex-shrink: 0;
}

.brand-mark {
  width: 40px;
  height: 40px;
  object-fit: contain;
}

.brand-mark-text {
  font-family: 'Newsreader', serif;
  font-size: 1.4rem;
  font-weight: 700;
  color: #fff;
  letter-spacing: -0.05em;
  line-height: 1;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid #fff;
}

.menu-toggle {
  background: none;
  border: none;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 10px;
  min-width: 40px;
  min-height: 40px;
  justify-content: center;
  align-items: center;
}

.burger-line {
  display: block;
  width: 24px;
  height: 2px;
  background: #fff;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.nav-cta {
  font-family: 'Roboto', sans-serif;
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #000;
  background: #fff;
  padding: 10px 20px;
  min-height: 40px;
  display: flex;
  align-items: center;
  text-decoration: none;
  transition: background 0.15s ease, color 0.15s ease;
}

.nav-cta:hover {
  background: #e0e0e0;
  color: #000;
  text-decoration: none;
}

/* ── 全屏遮罩菜单 ── */
.fullscreen-menu {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: #000;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 4rem 3rem;
}

.fullscreen-menu[hidden] {
  display: none;
}

.menu-close {
  position: absolute;
  top: 1.5rem;
  right: 2rem;
  background: none;
  border: none;
  color: #fff;
  font-size: 1.5rem;
  cursor: pointer;
  padding: 10px;
  min-width: 40px;
  min-height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
}

.menu-close:hover {
  opacity: 0.7;
}

.fullscreen-nav {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.nav-link {
  font-family: 'Newsreader', serif;
  font-size: clamp(1.4rem, 4vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  color: #fff;
  padding: 0.5rem 0;
  border-bottom: 1px solid #1a1a1a;
  text-decoration: none;
  transition: color 0.15s ease, padding-left 0.15s ease;
  min-height: 48px;
  display: flex;
  align-items: center;
}

.nav-link:hover,
.nav-link--active {
  color: #ccc;
  padding-left: 1rem;
  text-decoration: none;
}

/* ── 主内容区域 ── */
main {
  flex: 1;
  padding-top: 64px;
}

/* ── 首页 Hero ── */
.hero-section {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  overflow: hidden;
  background: #000;
}

.hero-media {
  position: absolute;
  inset: 0;
  overflow: hidden;
}

.hero-media--empty {
  background: linear-gradient(160deg, #111 0%, #000 60%);
}

.hero-bg-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.35;
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: right;
  padding: 4rem 3rem 6rem;
  max-width: 100%;
}

.hero-h1 {
  font-family: 'Newsreader', serif;
  font-size: clamp(3rem, 10vw, 12rem);
  font-weight: 900;
  letter-spacing: -0.05em;
  line-height: 0.9;
  color: #fff;
  margin-bottom: 2rem;
  word-break: break-all;
}

.hero-lead {
  font-family: 'Roboto', sans-serif;
  font-size: clamp(1rem, 2vw, 1.25rem);
  font-weight: 300;
  color: rgba(255,255,255,0.75);
  max-width: 48ch;
  margin-left: auto;
  line-height: 1.6;
}

.hero-clip-bottom {
  position: absolute;
  bottom: -1px;
  left: 0;
  right: 0;
  height: 80px;
  background: #000;
  clip-path: polygon(0 100%, 100% 100%, 100% 0);
  z-index: 3;
}

/* ── 内页 Hero（FAQ、通用） ── */
.inner-hero-section {
  padding: 6rem 3rem 4rem;
  border-bottom: 1px solid #222;
  background: #000;
}

.inner-hero-eyebrow {
  font-family: 'Roboto', sans-serif;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: #888;
  margin-bottom: 1.5rem;
}

.inner-hero-h1 {
  font-family: 'Newsreader', serif;
  font-size: clamp(2.5rem, 6vw, 7rem);
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1;
  color: #fff;
  margin-bottom: 1.5rem;
  max-width: 20ch;
}

.inner-hero-meta {
  font-size: 0.875rem;
  color: #666;
  font-family: 'Roboto', sans-serif;
}

.inner-hero-meta time {
  color: #888;
}

/* ── 文章 Hero ── */
.article-hero-section {
  padding: 6rem 3rem 4rem;
  border-bottom: 1px solid #222;
  background: #000;
}

.article-hero-media {
  margin-bottom: 3rem;
  overflow: hidden;
  max-height: 60vh;
}

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

.article-breadcrumb {
  font-family: 'Roboto', sans-serif;
  font-size: 0.8125rem;
  color: #666;
  margin-bottom: 1.5rem;
  letter-spacing: 0.02em;
}

.article-breadcrumb a {
  color: #888;
  text-decoration: none;
}

.article-breadcrumb a:hover {
  color: #fff;
}

.article-h1 {
  font-family: 'Newsreader', serif;
  font-size: clamp(2.5rem, 5vw, 6rem);
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1.05;
  color: #fff;
  margin-bottom: 1.5rem;
  max-width: 24ch;
}

.article-meta {
  font-family: 'Roboto', sans-serif;
  font-size: 0.875rem;
  color: #666;
}

.article-meta time {
  color: #888;
}

/* ── 关于我们 Hero ── */
.about-hero-section {
  padding: 8rem 3rem 5rem;
  border-bottom: 1px solid #222;
  background: #000;
  overflow: hidden;
}

.about-hero-label {
  font-family: 'Roboto', sans-serif;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: #555;
  margin-bottom: 2rem;
}

.about-hero-h1 {
  font-family: 'Newsreader', serif;
  font-size: clamp(2rem, 5vw, 5rem);
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1.05;
  color: #fff;
  margin-bottom: 2rem;
  max-width: 28ch;
}

.about-hero-brand {
  font-family: 'Newsreader', serif;
  font-size: clamp(3rem, 8vw, 10rem);
  font-weight: 900;
  letter-spacing: -0.06em;
  line-height: 0.85;
  color: #1a1a1a;
  margin-top: 2rem;
  word-break: break-all;
  user-select: none;
}

/* ── 隐私政策 Hero ── */
.privacy-hero-section {
  padding: 6rem 3rem 4rem;
  border-bottom: 1px solid #222;
  background: #000;
}

.privacy-hero-label {
  font-family: 'Roboto', sans-serif;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: #555;
  margin-bottom: 1.5rem;
}

.privacy-hero-h1 {
  font-family: 'Newsreader', serif;
  font-size: clamp(2rem, 5vw, 5rem);
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1.05;
  color: #fff;
  margin-bottom: 1rem;
}

.privacy-hero-meta {
  font-size: 0.875rem;
  color: #666;
  font-family: 'Roboto', sans-serif;
}

.privacy-hero-meta time {
  color: #888;
}

/* ── 正文内容区 ── */
.content-section {
  padding: 5rem 3rem;
  background: #000;
}

.content-prose {
  max-width: 72ch;
  font-size: 1.0625rem;
  line-height: 1.75;
  color: rgba(255,255,255,0.88);
}

.content-prose--narrow {
  max-width: 60ch;
}

.content-prose h2 {
  font-family: 'Newsreader', serif;
  font-size: clamp(1.5rem, 3vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  color: #fff;
  margin-top: 3rem;
  margin-bottom: 0.5rem;
  line-height: 1.1;
}

.content-prose h2 + hr {
  border: none;
  border-top: 1px solid #333;
  margin-bottom: 1.5rem;
}

.content-prose h3 {
  font-family: 'Newsreader', serif;
  font-size: clamp(1.1rem, 2vw, 1.6rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  color: #fff;
  margin-top: 2.5rem;
  margin-bottom: 0.75rem;
  line-height: 1.2;
}

.content-prose p {
  margin-bottom: 1.25rem;
}

.content-prose ul,
.content-prose ol {
  margin-left: 1.5rem;
  margin-bottom: 1.25rem;
}

.content-prose li {
  margin-bottom: 0.5rem;
}

.content-prose a {
  color: #fff;
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-color: #555;
  transition: text-decoration-color 0.15s;
}

.content-prose a:hover {
  text-decoration-color: #fff;
}

.content-prose strong {
  font-weight: 700;
  color: #fff;
}

.content-prose em {
  font-style: italic;
  color: rgba(255,255,255,0.8);
}

.content-prose time {
  font-family: 'Roboto', sans-serif;
  font-size: 0.875em;
  color: #888;
}

.content-prose blockquote {
  border-left: 3px solid #fff;
  padding-left: 1.5rem;
  margin: 2rem 0;
  color: rgba(255,255,255,0.65);
  font-style: italic;
}

.content-prose code {
  font-family: 'Roboto Mono', monospace;
  font-size: 0.875em;
  background: #111;
  padding: 0.1em 0.4em;
  color: #e0e0e0;
}

.content-prose pre {
  background: #111;
  padding: 1.5rem;
  overflow-x: auto;
  margin: 2rem 0;
}

.content-prose img {
  max-width: 100%;
  height: auto;
  margin: 2rem 0;
}

/* ── 索引/列表区块 ── */
.index-section {
  padding: 5rem 3rem;
  border-top: 1px solid #111;
  background: #000;
}

.index-section h2 {
  font-family: 'Newsreader', serif;
  font-size: clamp(1.75rem, 4vw, 3.5rem);
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1;
  color: #fff;
  margin-bottom: 0.5rem;
}

.index-section > h2 + hr {
  border: none;
  border-top: 1px solid #333;
  margin-bottom: 2.5rem;
}

/* ── 列表表格 ── */
.list-table {
  width: 100%;
  border-collapse: collapse;
  table-layout: fixed;
}

.list-row {
  border-bottom: 1px solid #1a1a1a;
  transition: background 0.15s ease;
}

.list-row:hover {
  background: rgba(255,255,255,0.03);
}

.list-cell-num {
  width: 10rem;
  padding: 1.25rem 1rem 1.25rem 0;
  font-family: 'Roboto', sans-serif;
  font-size: 0.75rem;
  font-weight: 500;
  color: #555;
  letter-spacing: 0.05em;
  vertical-align: top;
  white-space: nowrap;
}

.list-cell-num time {
  color: #666;
}

.list-cell-title {
  padding: 1.25rem 1.5rem 1.25rem 0;
  vertical-align: top;
}

.list-cell-title a {
  font-family: 'Newsreader', serif;
  font-size: clamp(1rem, 2vw, 1.3rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  color: #fff;
  text-decoration: none;
  transition: color 0.15s ease;
  line-height: 1.3;
}

.list-cell-title a:hover {
  color: #ccc;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.list-cell-desc {
  padding: 1.25rem 0;
  font-family: 'Roboto', sans-serif;
  font-size: 0.875rem;
  color: #666;
  line-height: 1.5;
  vertical-align: top;
  word-break: break-all;
}

/* ── 关于页 - 链接区 ── */
.about-links-section {
  padding: 5rem 3rem;
  border-top: 1px solid #111;
  background: #000;
}

.about-links-section h2 {
  font-family: 'Newsreader', serif;
  font-size: clamp(1.75rem, 4vw, 3.5rem);
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1;
  color: #fff;
  margin-bottom: 0.5rem;
}

.about-links-section > h2 + hr {
  border: none;
  border-top: 1px solid #333;
  margin-bottom: 2.5rem;
}

/* ── 隐私页 - 返回链接 ── */
.privacy-nav-section {
  padding: 3rem;
  border-top: 1px solid #111;
  display: flex;
  gap: 2rem;
  flex-wrap: wrap;
}

.privacy-back-link {
  font-family: 'Roboto', sans-serif;
  font-size: 0.875rem;
  color: #888;
  text-decoration: none;
  padding: 12px 0;
  min-height: 40px;
  display: inline-flex;
  align-items: center;
  transition: color 0.15s;
}

.privacy-back-link:hover {
  color: #fff;
}

/* ── 页脚 ── */
.site-footer {
  background: #000;
  border-top: 1px solid #222;
  padding: 6rem 3rem 3rem;
  margin-top: auto;
}

.footer-brand-row {
  margin-bottom: 5rem;
  overflow: hidden;
}

.footer-brand-giant {
  display: block;
  font-family: 'Newsreader', serif;
  font-size: clamp(3rem, 10vw, 12rem);
  font-weight: 900;
  letter-spacing: -0.06em;
  line-height: 0.85;
  color: #111;
  word-break: break-all;
  user-select: none;
}

.footer-cols {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 3rem;
  margin-bottom: 4rem;
  border-top: 1px solid #1a1a1a;
  padding-top: 3rem;
}

.footer-dl dt {
  font-family: 'Roboto', sans-serif;
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: #444;
  margin-bottom: 1rem;
}

.footer-dl dd {
  font-family: 'Roboto', sans-serif;
  font-size: 0.875rem;
  color: #666;
  margin-bottom: 0.5rem;
  line-height: 1.5;
}

.footer-dl dd a {
  color: #666;
  text-decoration: none;
  transition: color 0.15s ease;
  display: inline-block;
  min-height: 28px;
  line-height: 28px;
}

.footer-dl dd a:hover {
  color: #fff;
}

.footer-bottom {
  border-top: 1px solid #111;
  padding-top: 2rem;
  text-align: center;
}

.footer-bottom p {
  font-family: 'Roboto', sans-serif;
  font-size: 0.8125rem;
  color: #444;
  line-height: 1.6;
}

/* ── 动画 ── */
@keyframes stagger-in {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.stagger-animate {
  animation: stagger-in 0.45s ease both;
}

/* ── 减动效 ── */
@media (prefers-reduced-motion: reduce) {
  .stagger-animate {
    animation: none;
  }
  * {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}

/* ── 移动端断点 ── */
@media (max-width: 768px) {
  .site-header {
    padding: 0 1.25rem;
  }

  .hero-content {
    padding: 3rem 1.5rem 5rem;
    text-align: right;
  }

  .inner-hero-section {
    padding: 4rem 1.5rem 3rem;
  }

  .article-hero-section {
    padding: 4rem 1.5rem 3rem;
  }

  .about-hero-section {
    padding: 5rem 1.5rem 3rem;
  }

  .privacy-hero-section {
    padding: 4rem 1.5rem 3rem;
  }

  .content-section {
    padding: 3rem 1.5rem;
  }

  .index-section {
    padding: 3rem 1.5rem;
  }

  .about-links-section {
    padding: 3rem 1.5rem;
  }

  .privacy-nav-section {
    padding: 2rem 1.5rem;
  }

  .footer-cols {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .site-footer {
    padding: 4rem 1.5rem 2rem;
  }

  .list-table {
    table-layout: auto;
  }

  .list-cell-num {
    display: none;
  }

  .list-cell-title {
    width: 55%;
    padding-right: 1rem;
  }

  .list-cell-desc {
    width: 45%;
  }

  .fullscreen-menu {
    padding: 4rem 1.5rem;
  }

  .nav-link {
    font-size: clamp(1.25rem, 5vw, 2rem);
  }
}

@media (max-width: 480px) {
  .list-cell-desc {
    display: none;
  }

  .list-cell-title {
    width: 100%;
  }

  .hero-h1 {
    font-size: clamp(2.5rem, 12vw, 5rem);
  }
}

/* ── 玻璃卡片（可选用于嵌入 content） ── */
.glass-card {
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.08);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  padding: 2rem;
  margin: 1.5rem 0;
}

/* ── 焦点可见 ── */
:focus-visible {
  outline: 2px solid #fff;
  outline-offset: 2px;
}