@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+Thai:wght@300;400;500;700&display=swap');

/* ============================================================
   CSS 变量 & 重置
   ============================================================ */
: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;
  --c-glass-bg: rgba(255,255,255,0.06);
  --c-glass-border: rgba(255,255,255,0.14);
  --c-glass-shadow: rgba(0,0,0,0.45);
  --radius-card: 28px;
  --radius-btn: 4px;
  --font-body: 'Noto Sans Thai', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  --max-w: 1200px;
  --header-h: 64px;
  --transition: 0.3s ease;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  scroll-behavior: smooth;
  font-size: 16px;
  background: var(--c-black);
  color: var(--c-white);
}

body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.7;
  background: var(--c-black);
  color: var(--c-white);
  min-height: 100vh;
  overflow-x: hidden;
}

img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
a:hover { opacity: 0.75; }

h1,h2,h3,h4 {
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.01em;
}

h1 { font-size: clamp(1.8rem, 5vw, 3.2rem); }
h2 { font-size: clamp(1.3rem, 3vw, 2rem); margin-top: 2rem; }
h3 { font-size: 1.2rem; margin-top: 1.5rem; }

hr {
  border: none;
  border-top: 1px solid var(--c-gray-600);
  margin: 0.6rem 0 1.4rem;
}

p { margin-bottom: 1.1rem; }
ul, ol { padding-left: 1.5rem; margin-bottom: 1rem; }
li { margin-bottom: 0.4rem; }

/* ============================================================
   导航 Header
   ============================================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(0,0,0,0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255,255,255,0.08);
  height: var(--header-h);
}

.header-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 1.5rem;
  height: 100%;
  display: flex;
  align-items: center;
  gap: 2rem;
}

.brand-icon {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 40px;
  min-height: 40px;
}

.brand-mark {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: var(--c-white);
  color: var(--c-black);
  font-weight: 700;
  font-size: 1.1rem;
  border-radius: 4px;
}

.site-header nav {
  flex: 1;
  overflow: hidden;
}

.site-header nav > p {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 1.5rem;
  align-items: center;
}

.site-header nav > p > a {
  white-space: nowrap;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--c-gray-200);
  padding: 0.6rem 0;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition), color var(--transition);
}

.site-header nav > p > a:hover {
  color: var(--c-white);
  border-bottom-color: var(--c-white);
  opacity: 1;
}

/* 粘性锚点条 */
.sticky-anchor {
  position: sticky;
  top: var(--header-h);
  z-index: 90;
  background: rgba(0,0,0,0.88);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  backdrop-filter: blur(8px);
}

.sticky-anchor > p {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  gap: 2rem;
  overflow-x: auto;
  scrollbar-width: none;
}

.sticky-anchor > p::-webkit-scrollbar { display: none; }

.sticky-anchor > p > a {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--c-gray-400);
  padding: 0.65rem 0;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  white-space: nowrap;
  border-bottom: 2px solid transparent;
  transition: color var(--transition), border-color var(--transition);
}

.sticky-anchor > p > a:hover {
  color: var(--c-white);
  border-bottom-color: var(--c-white);
  opacity: 1;
}

/* ============================================================
   面包屑
   ============================================================ */
.breadcrumb {
  background: transparent;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}

.breadcrumb > p {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0.6rem 1.5rem;
  font-size: 0.8rem;
  color: var(--c-gray-400);
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  align-items: center;
}

.breadcrumb a { color: var(--c-gray-400); }
.breadcrumb a:hover { color: var(--c-white); opacity: 1; }

/* ============================================================
   玻璃拟态卡片
   ============================================================ */
.glass-card {
  background: var(--c-glass-bg);
  border: 1px solid var(--c-glass-border);
  border-radius: var(--radius-card);
  backdrop-filter: blur(16px);
  box-shadow: 0 4px 24px var(--c-glass-shadow);
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
}

.glass-card:hover {
  transform: translateY(-3px);
  background: rgba(255,255,255,0.1);
  box-shadow: 0 8px 40px rgba(0,0,0,0.6);
  opacity: 1;
}

.card {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  padding: 1.5rem;
}

.card > strong {
  display: block;
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.35;
  color: var(--c-white);
}

.card-body {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.card-thumb { border-radius: 12px; overflow: hidden; width: 100%; }
.card-thumb img { width: 100%; height: 160px; object-fit: cover; border-radius: 12px; }

.card-desc {
  font-size: 0.875rem;
  color: var(--c-gray-400);
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-date {
  font-size: 0.75rem;
  color: var(--c-gray-600);
  font-weight: 300;
}

/* ============================================================
   卡片网格
   ============================================================ */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
  margin-top: 1.5rem;
}

/* ============================================================
   Hero — 首页
   ============================================================ */
.hero-section {
  display: grid;
  grid-template-columns: 1fr 1fr;
  min-height: 70vh;
  align-items: center;
  position: relative;
  overflow: hidden;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 4rem 1.5rem;
  gap: 3rem;
}

.hero-text {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  align-items: flex-start;
  z-index: 2;
}

.hero-eyebrow {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--c-gray-400);
  border-left: 3px solid var(--c-white);
  padding-left: 0.75rem;
  margin-bottom: 0;
}

.hero-text h1 {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 700;
  line-height: 1.15;
}

.hero-lead {
  font-size: 1.1rem;
  color: var(--c-gray-200);
  line-height: 1.65;
  max-width: 44ch;
}

.hero-media {
  position: relative;
  height: 100%;
  min-height: 400px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-img { border-radius: 16px; width: 100%; height: auto; }

.hero-slash {
  position: absolute;
  top: -10%;
  left: -8%;
  width: 4px;
  height: 120%;
  background: var(--c-white);
  transform: rotate(12deg);
  transform-origin: top center;
  opacity: 0.15;
}

/* ============================================================
   CTA 按钮
   ============================================================ */
.cta-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 2rem;
  min-height: 48px;
  background: var(--c-white);
  color: var(--c-black);
  font-weight: 700;
  font-size: 0.9rem;
  border-radius: var(--radius-btn);
  letter-spacing: 0.04em;
  transition: background var(--transition), color var(--transition), opacity var(--transition);
}

.cta-btn:hover { opacity: 0.85; }

.cta-btn-outline {
  background: transparent;
  color: var(--c-white);
  border: 2px solid var(--c-white);
}

.cta-btn-outline:hover {
  background: var(--c-white);
  color: var(--c-black);
  opacity: 1;
}

/* ============================================================
   首页正文区
   ============================================================ */
.content-section {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 3rem 1.5rem;
}

.home-content {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 3rem;
  align-items: start;
}

.home-aside {
  position: sticky;
  top: calc(var(--header-h) + 1rem);
}

.topic-grid {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-top: 0.5rem;
}

.topic-link {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  padding: 0.75rem 1rem;
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 10px;
  transition: background var(--transition), border-color var(--transition);
}

.topic-link:hover {
  background: rgba(255,255,255,0.06);
  border-color: rgba(255,255,255,0.25);
  opacity: 1;
}

.topic-link strong { font-size: 0.875rem; font-weight: 700; line-height: 1.35; }
.topic-link .topic-desc { font-size: 0.75rem; color: var(--c-gray-400); line-height: 1.4; }

.home-main-content { min-width: 0; }

/* ============================================================
   精选区
   ============================================================ */
.featured-section {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 2rem 1.5rem 4rem;
}

/* ============================================================
   Prose 正文
   ============================================================ */
.prose-content {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--c-gray-200);
}

.prose-content h2 { color: var(--c-white); margin-top: 2.5rem; }
.prose-content h3 { color: var(--c-white); }
.prose-content a { color: var(--c-white); text-decoration: underline; text-underline-offset: 3px; }
.prose-content a:hover { opacity: 0.7; }

.prose-content blockquote {
  border-left: 4px solid var(--c-white);
  padding: 1rem 1.5rem;
  margin: 1.5rem 0;
  background: rgba(255,255,255,0.04);
  border-radius: 0 8px 8px 0;
  font-size: 1.1rem;
  font-style: italic;
  color: var(--c-gray-200);
}

.prose-content figure { margin: 2rem 0; }
.prose-content figcaption { font-size: 0.8rem; color: var(--c-gray-400); margin-top: 0.5rem; text-align: center; }
.prose-content img { border-radius: 12px; }

/* 首字下沉 */
.drop-cap .prose-content > p:first-of-type::first-letter,
.drop-cap > p:first-of-type::first-letter {
  float: left;
  font-size: 3.8em;
  line-height: 0.85;
  font-weight: 700;
  margin-right: 0.1em;
  margin-top: 0.05em;
  color: var(--c-white);
}

/* ============================================================
   文章 Layout
   ============================================================ */
.article-layout { max-width: var(--max-w); margin: 0 auto; }

.article-hero {
  padding: 3rem 1.5rem 2rem;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.article-meta-top {
  display: flex;
  gap: 1rem;
  align-items: center;
  flex-wrap: wrap;
  margin-bottom: 1rem;
}

.article-date {
  font-size: 0.8rem;
  color: var(--c-gray-400);
  font-weight: 300;
}

.article-modified {
  font-size: 0.8rem;
  color: var(--c-gray-600);
}

.article-h1 { margin-bottom: 0.75rem; }

.article-lead {
  font-size: 1.1rem;
  color: var(--c-gray-400);
  line-height: 1.65;
  margin-top: 0.5rem;
}

.article-figure { margin-top: 1.5rem; }
.article-hero-img { border-radius: 16px; width: 100%; max-height: 420px; object-fit: cover; }

.article-body-section {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 3rem;
  padding: 2.5rem 1.5rem 4rem;
  align-items: start;
}

.article-aside {
  position: sticky;
  top: calc(var(--header-h) + 1rem);
}

.aside-heading {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--c-gray-400);
  margin-top: 0;
}

.related-list {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.related-link {
  display: flex;
  flex-direction: column;
  padding: 0.6rem 0.75rem;
  border-left: 2px solid rgba(255,255,255,0.12);
  transition: border-color var(--transition);
  gap: 0.2rem;
}

.related-link:hover {
  border-left-color: var(--c-white);
  opacity: 1;
}

.related-link strong { font-size: 0.8rem; font-weight: 600; line-height: 1.35; }
.related-link span { font-size: 0.72rem; color: var(--c-gray-400); line-height: 1.4; }

.aside-tags { display: flex; flex-direction: column; gap: 0.5rem; }

.aside-tag {
  display: inline-flex;
  align-items: center;
  padding: 0.4rem 0.8rem;
  min-height: 36px;
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: 4px;
  font-size: 0.78rem;
  font-weight: 500;
  transition: background var(--transition), border-color var(--transition);
}

.aside-tag:hover {
  background: rgba(255,255,255,0.08);
  border-color: var(--c-white);
  opacity: 1;
}

.aside-nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1rem;
}

/* ============================================================
   栏目页 Layout
   ============================================================ */
.topic-layout { max-width: var(--max-w); margin: 0 auto; }

.topic-hero {
  padding: 3rem 1.5rem 2rem;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  position: relative;
  overflow: hidden;
}

.topic-hero::before {
  content: '';
  position: absolute;
  right: -60px;
  top: -40px;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(255,255,255,0.04) 0%, transparent 70%);
  pointer-events: none;
}

.topic-hero-inner { position: relative; z-index: 1; }

.topic-eyebrow {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--c-gray-400);
  margin-bottom: 0.75rem;
  padding-left: 0.75rem;
  border-left: 3px solid rgba(255,255,255,0.3);
}

.topic-lead {
  font-size: 1.05rem;
  color: var(--c-gray-400);
  line-height: 1.65;
  max-width: 60ch;
  margin-top: 0.75rem;
}

.topic-body-section {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 3rem;
  padding: 2.5rem 1.5rem 3rem;
  align-items: start;
}

.topic-aside {
  position: sticky;
  top: calc(var(--header-h) + 1rem);
}

.topic-main { min-width: 0; }

.topic-card-grid { grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); }

.topic-related-section {
  padding: 2rem 1.5rem 4rem;
}

.topic-related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1.25rem;
  margin-top: 1.5rem;
}

.topic-related-grid .card {
  padding: 1.25rem 1.5rem;
}

.topic-related-grid .card strong { font-size: 0.9rem; }
.topic-related-grid .card .card-desc { font-size: 0.8rem; }

/* ============================================================
   Tag Layout
   ============================================================ */
.tag-layout { max-width: var(--max-w); margin: 0 auto; }

.tag-hero {
  padding: 3rem 1.5rem 2rem;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.tag-body-section {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 3rem;
  padding: 2.5rem 1.5rem 4rem;
  align-items: start;
}

.tag-aside {
  position: sticky;
  top: calc(var(--header-h) + 1rem);
}

.tag-main { min-width: 0; }
.tag-card-grid { grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); }

/* ============================================================
   About Layout
   ============================================================ */
.about-layout { max-width: var(--max-w); margin: 0 auto; }

.about-hero {
  padding: 3rem 1.5rem 2rem;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.about-body-section {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 3rem;
  padding: 2.5rem 1.5rem 4rem;
  align-items: start;
}

.about-aside {
  position: sticky;
  top: calc(var(--header-h) + 1rem);
}

.about-content { min-width: 0; }

/* ============================================================
   Privacy Layout
   ============================================================ */
.privacy-layout { max-width: var(--max-w); margin: 0 auto; }

.privacy-hero {
  padding: 3rem 1.5rem 2rem;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.policy-updated {
  font-size: 0.8rem;
  color: var(--c-gray-400);
  margin-bottom: 0.5rem;
}

.privacy-body-section {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 3rem;
  padding: 2.5rem 1.5rem 4rem;
  align-items: start;
}

.privacy-aside {
  position: sticky;
  top: calc(var(--header-h) + 1rem);
}

.privacy-content { min-width: 0; }

/* ============================================================
   Generic
   ============================================================ */
.generic-hero {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 3rem 1.5rem 2rem;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.generic-body {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 3rem;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 2.5rem 1.5rem 4rem;
  align-items: start;
}

/* ============================================================
   Footer
   ============================================================ */
.site-footer {
  border-top: 1px solid rgba(255,255,255,0.1);
  margin-top: 4rem;
}

.footer-cta-block {
  background: rgba(255,255,255,0.04);
  border-bottom: 1px solid rgba(255,255,255,0.08);
  padding: 3rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1.5rem;
  max-width: var(--max-w);
  margin: 0 auto;
}

.footer-cta-text {
  font-size: 1.25rem;
  font-weight: 700;
  margin: 0;
}

.footer-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 2rem 1.5rem;
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 2rem;
  align-items: start;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.footer-brand-name {
  font-size: 0.85rem;
  font-weight: 700;
  white-space: nowrap;
}

.site-footer nav > p {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 1.25rem;
  align-items: center;
}

.site-footer nav > p > a {
  font-size: 0.8rem;
  color: var(--c-gray-400);
  padding: 0.45rem 0;
  min-height: 40px;
  display: inline-flex;
  align-items: center;
  transition: color var(--transition);
}

.site-footer nav > p > a:hover { color: var(--c-white); opacity: 1; }

.footer-copy {
  text-align: right;
}

.footer-copy p {
  font-size: 0.75rem;
  color: var(--c-gray-600);
  margin-bottom: 0.3rem;
  line-height: 1.5;
}

/* ============================================================
   空状态
   ============================================================ */
.empty-tip {
  color: var(--c-gray-400);
  font-size: 0.9rem;
  padding: 2rem 0;
}

/* ============================================================
   Scroll Reveal 动效
   ============================================================ */
@media (prefers-reduced-motion: no-preference) {
  .reveal {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.55s ease, transform 0.55s ease;
  }
  .reveal.visible {
    opacity: 1;
    transform: none;
  }
  .card { transition: transform 0.3s ease, box-shadow 0.3s ease, background 0.3s ease; }
}

@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; }
  * { transition: none !important; animation: none !important; scroll-behavior: auto !important; }
}

/* ============================================================
   移动端响应
   ============================================================ */
@media (max-width: 768px) {
  :root { --header-h: 56px; }

  .site-header nav > p {
    gap: 0.15rem 0.75rem;
    overflow-x: auto;
    flex-wrap: nowrap;
    scrollbar-width: none;
  }
  .site-header nav > p::-webkit-scrollbar { display: none; }

  .hero-section {
    grid-template-columns: 1fr;
    min-height: auto;
    padding: 2.5rem 1.25rem;
    gap: 2rem;
  }

  .hero-media { min-height: 220px; }

  .home-content {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .home-aside { position: static; }

  .article-body-section,
  .topic-body-section,
  .tag-body-section,
  .about-body-section,
  .privacy-body-section,
  .generic-body {
    grid-template-columns: 1fr;
    gap: 2rem;
    padding: 1.5rem 1.25rem 3rem;
  }

  .article-aside,
  .topic-aside,
  .tag-aside,
  .about-aside,
  .privacy-aside {
    position: static;
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: 16px;
    padding: 1.25rem;
  }

  .footer-inner {
    grid-template-columns: 1fr;
    gap: 1.25rem;
    text-align: center;
  }

  .footer-brand { justify-content: center; }
  .footer-copy { text-align: center; }
  .site-footer nav > p { justify-content: center; }

  .footer-cta-block {
    flex-direction: column;
    text-align: center;
  }

  .card-grid { grid-template-columns: 1fr; }

  .topic-related-grid { grid-template-columns: 1fr; }

  .drop-cap .prose-content > p:first-of-type::first-letter,
  .drop-cap > p:first-of-type::first-letter {
    font-size: 2.8em;
  }
}

@media (max-width: 480px) {
  body { font-size: 1rem; }
  h1 { font-size: 1.6rem; }
  h2 { font-size: 1.2rem; }
  .article-hero, .topic-hero, .tag-hero, .about-hero, .privacy-hero {
    padding: 2rem 1.25rem 1.5rem;
  }
}