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

/* ===========================
   CSS 变量 & 重置
=========================== */
:root {
  --red: #D72638;
  --brown: #5C3317;
  --cream: #F5F0E8;
  --red-dark: #b51e2c;
  --brown-light: #7a4522;
  --cream-dark: #e8e0ce;
  --text-dark: #1a0a00;
  --text-mid: #3d1f0a;
  --text-light: #F5F0E8;
  --font: 'Space Grotesk', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --nav-h: 48px;
  --brand-h: 64px;
  --radius: 2px;
  --transition: 160ms ease;
  --max-w: 1200px;
  --content-max: 820px;
}

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

html {
  font-size: 17px;
  line-height: 1.6;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font);
  background: var(--cream);
  color: var(--text-dark);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
}

main {
  flex: 1;
}

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

a {
  color: var(--red);
  text-decoration: none;
  transition: color var(--transition), background var(--transition), opacity var(--transition);
}

a:hover {
  color: var(--red-dark);
}

ul, ol {
  list-style: none;
}

/* ===========================
   页头
=========================== */
.site-header {
  background: var(--brown);
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 3px solid var(--red);
}

.brand-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 0 24px;
  height: var(--brand-h);
  background: var(--brown);
}

.brand-inner {
  display: flex;
  align-items: center;
  gap: 16px;
  flex: 1;
  min-width: 0;
}

.logo-img {
  height: 40px;
  width: auto;
  display: block;
}

.logo-text {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--cream);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.logo-text:hover {
  color: var(--red);
}

.brand-tagline {
  font-size: 0.82rem;
  color: rgba(245,240,232,0.65);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.header-contact {
  flex-shrink: 0;
}

.contact-btn {
  display: inline-block;
  padding: 8px 18px;
  background: var(--red);
  color: var(--cream) !important;
  font-weight: 700;
  font-size: 0.88rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  border-radius: var(--radius);
  min-height: 40px;
  line-height: 1.3;
  display: flex;
  align-items: center;
}

.contact-btn:hover {
  background: var(--red-dark);
  color: var(--cream) !important;
}

.main-nav {
  background: var(--red);
  padding: 0 24px;
  border-top: 2px solid rgba(0,0,0,0.15);
}

.main-nav > p {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0;
  min-height: var(--nav-h);
}

.main-nav > p > a {
  display: inline-flex;
  align-items: center;
  padding: 10px 14px;
  color: var(--cream);
  font-size: 0.88rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  border-right: 1px solid rgba(245,240,232,0.2);
  min-height: 48px;
  white-space: nowrap;
}

.main-nav > p > a:first-child {
  border-left: 1px solid rgba(245,240,232,0.2);
}

.main-nav > p > a:hover {
  background: rgba(0,0,0,0.18);
  color: var(--cream);
}

/* ===========================
   面包屑
=========================== */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.82rem;
  color: rgba(245,240,232,0.75);
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.breadcrumb a {
  color: rgba(245,240,232,0.85);
}

.breadcrumb a:hover {
  color: var(--cream);
}

.breadcrumb span[aria-hidden] {
  opacity: 0.5;
}

/* ===========================
   Hero — 首页
=========================== */
.hero-section {
  position: relative;
  min-height: 70vh;
  background: var(--brown);
  display: flex;
  align-items: center;
  overflow: hidden;
  clip-path: polygon(0 0, 100% 0, 100% 88%, 0 100%);
  padding: 80px 24px 120px;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 640px;
  margin-left: max(24px, calc((100vw - var(--max-w)) / 2));
}

.hero-eyebrow {
  display: inline-block;
  background: var(--red);
  color: var(--cream);
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: 4px 14px;
  margin-bottom: 20px;
  border-radius: var(--radius);
}

.hero-section h1,
.hero-section .hero-content h1 {
  font-size: clamp(2.2rem, 6vw, 4rem);
  font-weight: 700;
  color: var(--cream);
  line-height: 1.12;
  margin-bottom: 20px;
  text-transform: uppercase;
  letter-spacing: -0.01em;
}

.hero-sub {
  font-size: 1.05rem;
  color: rgba(245,240,232,0.8);
  line-height: 1.65;
  margin-bottom: 32px;
  max-width: 520px;
}

.hero-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--red);
  color: var(--cream) !important;
  font-weight: 700;
  font-size: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 14px 32px;
  border-radius: var(--radius);
  border: 2px solid var(--red);
  min-height: 48px;
}

.hero-cta:hover {
  background: transparent;
  color: var(--red) !important;
  border-color: var(--red);
}

.hero-deco {
  position: absolute;
  right: 4%;
  top: 50%;
  transform: translateY(-50%);
  z-index: 1;
  pointer-events: none;
  user-select: none;
}

.hero-deco span {
  font-size: clamp(8rem, 22vw, 18rem);
  font-weight: 700;
  color: rgba(245,240,232,0.05);
  line-height: 1;
  display: block;
  letter-spacing: -0.05em;
}

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

.hero-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.18;
}

/* ===========================
   Hero — 内页
=========================== */
.page-hero {
  position: relative;
  background: var(--brown);
  overflow: hidden;
  clip-path: polygon(0 0, 100% 0, 100% 90%, 0 100%);
  padding: 56px 24px 88px;
}

.page-hero-inner {
  position: relative;
  z-index: 2;
  max-width: var(--max-w);
  margin: 0 auto;
}

.page-hero h1 {
  font-size: clamp(1.8rem, 4vw, 3rem);
  font-weight: 700;
  color: var(--cream);
  line-height: 1.15;
  margin-bottom: 14px;
  text-transform: uppercase;
  letter-spacing: -0.01em;
}

.page-hero .hero-sub {
  font-size: 1rem;
  color: rgba(245,240,232,0.78);
  max-width: 560px;
}

.page-hero .hero-eyebrow {
  margin-bottom: 14px;
}

.page-hero .hero-deco {
  top: 50%;
}

/* ===========================
   内容区：侧边栏 + 正文
=========================== */
.content-section.prose-section {
  display: flex;
  flex-direction: row;
  align-items: flex-start;
  gap: 0;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0;
}

.sidebar {
  width: 240px;
  flex-shrink: 0;
  background: var(--brown);
  min-height: 100%;
  padding: 32px 20px;
  order: -1;
}

.aside-block {
  margin-bottom: 28px;
}

.aside-block h3 {
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--cream);
  margin-bottom: 12px;
  padding-bottom: 6px;
  border-bottom: 2px solid var(--red);
}

.aside-block h3 > span {
  display: inline;
}

.aside-block ul li {
  border-bottom: 1px solid rgba(245,240,232,0.1);
}

.aside-block ul li a {
  display: block;
  padding: 8px 0;
  color: rgba(245,240,232,0.82);
  font-size: 0.88rem;
  font-weight: 500;
  line-height: 1.4;
  min-height: 40px;
  display: flex;
  align-items: center;
}

.aside-block ul li a:hover {
  color: var(--cream);
  padding-left: 6px;
}

.main-content {
  flex: 1;
  min-width: 0;
  padding: 40px 32px;
}

/* ===========================
   正文样式
=========================== */
.page-content {
  font-size: 1rem;
  line-height: 1.75;
  color: var(--text-dark);
}

.page-content h2 {
  font-size: 1.45rem;
  font-weight: 700;
  color: var(--brown);
  margin: 36px 0 14px;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  border-left: 4px solid var(--red);
  padding-left: 12px;
}

.page-content h2 > span {
  display: inline;
}

.page-content h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--brown);
  margin: 28px 0 10px;
}

.page-content h3 > span {
  display: inline;
}

.page-content p {
  margin-bottom: 18px;
}

.page-content ul, .page-content ol {
  list-style: disc;
  padding-left: 22px;
  margin-bottom: 18px;
}

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

.page-content li {
  margin-bottom: 6px;
}

.page-content a {
  color: var(--red);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.page-content a:hover {
  color: var(--red-dark);
}

.page-content strong {
  font-weight: 700;
  color: var(--brown);
}

.page-content blockquote {
  border-left: 4px solid var(--red);
  padding: 12px 20px;
  background: var(--cream-dark);
  margin: 24px 0;
  font-style: italic;
  color: var(--text-mid);
}

.page-content code {
  background: var(--cream-dark);
  padding: 2px 6px;
  border-radius: var(--radius);
  font-family: monospace;
  font-size: 0.92em;
}

.page-content pre {
  background: var(--cream-dark);
  padding: 16px;
  overflow-x: auto;
  border-radius: var(--radius);
  margin-bottom: 18px;
}

.page-content table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 18px;
  font-size: 0.93rem;
}

.page-content th {
  background: var(--brown);
  color: var(--cream);
  padding: 10px 12px;
  text-align: left;
  font-weight: 700;
}

.page-content td {
  padding: 9px 12px;
  border-bottom: 1px solid var(--cream-dark);
}

.page-content tr:hover td {
  background: var(--cream-dark);
}

/* ===========================
   子页卡片
=========================== */
.children-section {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 48px 32px 64px;
}

.children-section > h2 {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--brown);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 32px;
  padding-bottom: 10px;
  border-bottom: 3px solid var(--red);
  display: flex;
  align-items: center;
  gap: 10px;
}

.children-section > h2 > span {
  display: inline;
}

.child-card {
  display: flex;
  flex-direction: row;
  gap: 0;
  border: 2px solid var(--brown);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--cream);
  margin-bottom: 20px;
  border-bottom: 4px solid var(--red);
  transition: border-color var(--transition), transform var(--transition);
}

.child-card:hover {
  border-color: var(--red);
  transform: translateX(4px);
}

.card-media {
  width: 180px;
  flex-shrink: 0;
  overflow: hidden;
  background: var(--brown);
}

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

.card-body {
  padding: 20px 24px;
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.card-body h3 {
  font-size: 1.08rem;
  font-weight: 700;
  color: var(--brown);
  line-height: 1.3;
  text-transform: uppercase;
  letter-spacing: 0.02em;
}

.card-body h3 > span {
  display: inline;
}

.card-desc {
  font-size: 0.92rem;
  color: var(--text-mid);
  line-height: 1.6;
  flex: 1;
}

.card-date {
  font-size: 0.8rem;
  color: rgba(92,51,23,0.6);
}

.card-date time {
  font-weight: 600;
}

.card-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--red);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  min-height: 40px;
  align-self: flex-start;
  padding: 8px 0;
}

.card-link:hover {
  color: var(--brown);
}

/* ===========================
   文章页专属
=========================== */
.article-header-section {
  background: var(--brown);
  padding: 48px 24px 72px;
  clip-path: polygon(0 0, 100% 0, 100% 88%, 0 100%);
  position: relative;
  overflow: hidden;
}

.article-header-section .breadcrumb {
  max-width: var(--max-w);
  margin: 0 auto 14px;
}

.article-header-section h1 {
  max-width: var(--max-w);
  margin: 0 auto 16px;
  font-size: clamp(1.7rem, 4vw, 2.8rem);
  font-weight: 700;
  color: var(--cream);
  line-height: 1.15;
  text-transform: uppercase;
  letter-spacing: -0.01em;
}

.article-meta {
  max-width: var(--max-w);
  margin: 0 auto 20px;
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.pub-date, .mod-date {
  font-size: 0.82rem;
  color: rgba(245,240,232,0.7);
  font-weight: 600;
}

.meta-topic {
  background: var(--red);
  color: var(--cream) !important;
  font-size: 0.78rem;
  font-weight: 700;
  padding: 3px 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  border-radius: var(--radius);
  min-height: 40px;
  display: inline-flex;
  align-items: center;
}

.meta-topic:hover {
  background: var(--red-dark);
}

.article-hero-media {
  max-width: var(--max-w);
  margin: 20px auto 0;
  overflow: hidden;
  border-radius: var(--radius);
}

.article-hero-img {
  width: 100%;
  max-height: 420px;
  object-fit: cover;
}

.article-body {
  max-width: var(--content-max);
}

.article-footer-nav {
  margin-top: 40px;
  padding-top: 20px;
  border-top: 2px solid var(--cream-dark);
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.btn-back {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 20px;
  background: var(--brown);
  color: var(--cream) !important;
  font-size: 0.88rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-radius: var(--radius);
  min-height: 40px;
}

.btn-back:hover {
  background: var(--red);
  color: var(--cream) !important;
}

/* ===========================
   关于页
=========================== */
.about-links {
  margin-top: 40px;
  padding: 24px;
  background: var(--cream-dark);
  border-left: 4px solid var(--red);
}

.about-links h2 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--brown);
  margin-bottom: 12px;
  text-transform: uppercase;
}

.about-links h2 > span {
  display: inline;
}

.about-links p {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.about-links a {
  color: var(--red);
  font-weight: 600;
  font-size: 0.9rem;
  min-height: 40px;
  display: inline-flex;
  align-items: center;
  padding: 8px 14px;
  border: 2px solid var(--red);
  border-radius: var(--radius);
}

.about-links a:hover {
  background: var(--red);
  color: var(--cream) !important;
}

/* ===========================
   日期
=========================== */
.pub-date, .mod-date {
  display: inline;
}

time {
  font-weight: 600;
}

/* ===========================
   页脚
=========================== */
.site-footer {
  background: var(--brown);
  border-top: 3px solid var(--red);
  margin-top: auto;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 20px 24px;
}

.footer-brand {
  flex-shrink: 0;
}

.footer-logo {
  font-size: 1rem;
  font-weight: 700;
  color: var(--cream);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  white-space: nowrap;
}

.footer-logo:hover {
  color: var(--red);
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}

.footer-nav a {
  color: rgba(245,240,232,0.72);
  font-size: 0.84rem;
  padding: 8px 10px;
  font-weight: 500;
  min-height: 40px;
  display: inline-flex;
  align-items: center;
  border-radius: var(--radius);
}

.footer-nav a:hover {
  color: var(--cream);
  background: rgba(245,240,232,0.1);
}

.footer-copy p {
  font-size: 0.8rem;
  color: rgba(245,240,232,0.5);
  white-space: nowrap;
}

/* ===========================
   标签页专属
=========================== */
.tag-articles {
  background: var(--cream-dark);
  padding-top: 40px;
  padding-bottom: 60px;
}

/* ===========================
   Reveal 动效
=========================== */
@media (prefers-reduced-motion: no-preference) {
  .reveal {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 400ms ease calc(var(--i, 0) * 80ms),
                transform 400ms ease calc(var(--i, 0) * 80ms);
  }

  .reveal.is-visible {
    opacity: 1;
    transform: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1;
    transform: none;
  }
}

/* ===========================
   响应式
=========================== */
@media (max-width: 960px) {
  .content-section.prose-section {
    flex-direction: column;
  }

  .sidebar {
    width: 100%;
    order: 0;
    padding: 24px 20px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 16px;
  }

  .aside-block {
    margin-bottom: 0;
  }

  .main-content {
    padding: 32px 20px;
  }

  .children-section {
    padding: 32px 20px 48px;
  }

  .child-card {
    flex-direction: column;
  }

  .card-media {
    width: 100%;
    height: 180px;
  }
}

@media (max-width: 600px) {
  html {
    font-size: 16px;
  }

  .brand-row {
    padding: 0 14px;
    height: auto;
    min-height: var(--brand-h);
    flex-wrap: wrap;
    gap: 8px;
    padding-top: 10px;
    padding-bottom: 10px;
  }

  .brand-tagline {
    display: none;
  }

  .main-nav {
    padding: 0 14px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }

  .main-nav > p {
    flex-wrap: nowrap;
    gap: 0;
    padding: 4px 0;
  }

  .main-nav > p > a {
    font-size: 0.8rem;
    padding: 8px 10px;
    white-space: nowrap;
    flex-shrink: 0;
  }

  .hero-section {
    min-height: 60vh;
    padding: 48px 14px 88px;
  }

  .hero-content {
    margin-left: 0;
  }

  .hero-section h1,
  .hero-content h1 {
    font-size: 1.9rem;
  }

  .page-hero {
    padding: 40px 14px 68px;
  }

  .page-hero h1 {
    font-size: 1.65rem;
  }

  .article-header-section {
    padding: 36px 14px 60px;
  }

  .article-header-section h1 {
    font-size: 1.6rem;
  }

  .sidebar {
    display: block;
  }

  .main-content {
    padding: 24px 14px;
  }

  .children-section {
    padding: 24px 14px 40px;
  }

  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
    padding: 16px 14px;
  }

  .footer-nav {
    gap: 2px;
  }

  .footer-nav a {
    font-size: 0.8rem;
    padding: 8px 8px;
  }

  .hero-deco {
    right: -2%;
  }

  .hero-deco span {
    font-size: 7rem;
  }

  .article-footer-nav {
    flex-direction: column;
  }
}