@import url('https://fonts.googleapis.com/css2?family=Didact+Gothic&family=Poiret+One&display=swap');

/* ===========================
   CSS 自定义属性
   =========================== */
:root {
  --c-bg: #1A1A1A;
  --c-gold: #C9A84C;
  --c-cream: #F5F0E8;
  --c-gold-dim: rgba(201, 168, 76, 0.15);
  --c-gold-mid: rgba(201, 168, 76, 0.4);
  --c-cream-dim: rgba(245, 240, 232, 0.08);
  --c-cream-mid: rgba(245, 240, 232, 0.6);
  --c-dark-2: #222222;
  --c-dark-3: #2a2a2a;
  --c-dark-4: #333333;

  --font-title: 'Poiret One', 'Didact Gothic', Georgia, serif;
  --font-body: 'Didact Gothic', 'Helvetica Neue', Arial, sans-serif;

  --nav-h: 72px;
  --radius: 0;
  --trans-base: 0.25s ease;
  --trans-slow: 0.5s ease;

  --content-w: 1200px;
  --article-w: 780px;
}

/* ===========================
   重置 & 基础
   =========================== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: var(--font-body);
  line-height: 1.7;
  background: var(--c-bg);
  color: var(--c-cream);
  overflow-x: hidden;
  min-height: 100vh;
}

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

a {
  color: var(--c-gold);
  text-decoration: none;
  transition: color var(--trans-base), opacity var(--trans-base);
}

a:hover, a:focus {
  color: var(--c-cream);
  text-decoration: underline;
}

a:focus-visible {
  outline: 2px solid var(--c-gold);
  outline-offset: 3px;
}

h1, h2, h3, h4 {
  font-family: var(--font-title);
  line-height: 1.2;
  letter-spacing: 0.08em;
}

p {
  font-size: 1rem;
  line-height: 1.75;
  color: var(--c-cream-mid);
}

ul, ol {
  list-style: none;
}

dl, dt, dd {
  margin: 0;
  padding: 0;
}

/* ===========================
   屏幕阅读器专用
   =========================== */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

/* ===========================
   全局包装
   =========================== */
.site-wrapper {
  position: relative;
  min-height: 100vh;
}

/* ===========================
   顶部导航
   =========================== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--nav-h);
  background: rgba(26, 26, 26, 0.96);
  border-bottom: 1px solid var(--c-gold-mid);
  backdrop-filter: blur(8px);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--content-w);
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
}

.nav-left, .nav-right {
  flex: 1;
}

.nav-right {
  display: flex;
  justify-content: flex-end;
}

.nav-left dl, .nav-right dl {
  display: flex;
  align-items: center;
  gap: 4px;
  flex-wrap: wrap;
}

.nav-left dt, .nav-right dt {
  display: flex;
}

.nav-left dt a, .nav-right dt a {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 10px 12px;
  min-height: 44px;
  font-family: var(--font-body);
  font-size: 0.8rem;
  color: var(--c-cream-mid);
  letter-spacing: 0.05em;
  white-space: nowrap;
  transition: color var(--trans-base);
  text-decoration: none;
}

.nav-left dt a:hover, .nav-right dt a:hover {
  color: var(--c-gold);
  text-decoration: none;
}

.nav-icon {
  color: var(--c-gold);
  font-size: 0.65rem;
  flex-shrink: 0;
}

.site-brand {
  flex-shrink: 0;
  padding: 0 20px;
}

.brand-link {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}

.brand-name {
  font-family: var(--font-title);
  font-size: 1.1rem;
  color: var(--c-gold);
  letter-spacing: 0.12em;
  white-space: nowrap;
}

.brand-logo {
  width: 32px;
  height: 32px;
  object-fit: contain;
}

/* ===========================
   点阵底纹 & 胶片质感
   =========================== */
.hero-bg-grid {
  position: absolute;
  inset: 0;
  z-index: 0;
  background-image:
    radial-gradient(circle, rgba(201,168,76,0.18) 1px, transparent 1px);
  background-size: 28px 28px;
  pointer-events: none;
}

.film-grain {
  position: absolute;
  inset: 0;
  z-index: 1;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.07'/%3E%3C/svg%3E");
  background-size: 200px 200px;
  opacity: 0.5;
  pointer-events: none;
  mix-blend-mode: overlay;
}

/* ===========================
   Parallax 章节基础
   =========================== */
.parallax-chapter {
  position: relative;
  overflow: hidden;
}

.parallax-layer {
  will-change: transform;
  transition: transform 0.05s linear;
}

/* ===========================
   首页 Hero
   =========================== */
.hero-section {
  height: 100vh;
  min-height: 600px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding-top: var(--nav-h);
}

.hero-layers {
  position: absolute;
  inset: 0;
  display: grid;
}

.hero-layer {
  position: absolute;
  inset: 0;
}

.hero-layer--back {
  z-index: 1;
  background: linear-gradient(160deg, #0d0d0d 0%, #1a1a1a 60%, #251f10 100%);
}

.hero-layer--mid {
  z-index: 2;
  display: flex;
  align-items: flex-end;
  justify-content: flex-end;
  opacity: 0.35;
}

.hero-layer--mid .hero-img {
  width: 60%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
  filter: sepia(0.4) contrast(1.1);
}

.hero-layer--front {
  z-index: 3;
  display: flex;
  align-items: flex-end;
  justify-content: flex-end;
  padding: 80px 60px;
}

.hero-content {
  text-align: right;
  max-width: 580px;
}

.hero-eyebrow {
  font-family: var(--font-body);
  font-size: 0.75rem;
  letter-spacing: 0.3em;
  color: var(--c-gold);
  text-transform: uppercase;
  margin-bottom: 16px;
}

.hero-h1 {
  font-size: clamp(2rem, 5vw, 3.8rem);
  color: var(--c-cream);
  margin-bottom: 20px;
  line-height: 1.1;
}

.hero-desc {
  font-size: 1rem;
  color: var(--c-cream-mid);
  margin-bottom: 32px;
  line-height: 1.7;
}

.hero-cta {
  display: inline-block;
  padding: 14px 36px;
  min-height: 48px;
  background: var(--c-gold);
  color: var(--c-bg);
  font-family: var(--font-title);
  font-size: 0.9rem;
  letter-spacing: 0.15em;
  text-decoration: none;
  transition: background var(--trans-base), transform var(--trans-base);
}

.hero-cta:hover {
  background: var(--c-cream);
  color: var(--c-bg);
  transform: translateY(-2px);
  text-decoration: none;
}

.hero-scroll-hint {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 10;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.scroll-line {
  display: block;
  width: 1px;
  height: 48px;
  background: linear-gradient(to bottom, var(--c-gold), transparent);
  animation: scrollPulse 2s ease-in-out infinite;
}

.scroll-txt {
  font-size: 0.65rem;
  letter-spacing: 0.25em;
  color: var(--c-gold);
}

@keyframes scrollPulse {
  0%, 100% { opacity: 0.4; transform: scaleY(1); }
  50% { opacity: 1; transform: scaleY(1.1); }
}

/* ===========================
   主体内容区
   =========================== */
.site-main {
  position: relative;
  z-index: 10;
  background: var(--c-bg);
}

.content-section {
  max-width: var(--content-w);
  margin: 0 auto;
  padding: 64px 24px;
  display: grid;
  grid-template-columns: 64px 1fr 280px;
  grid-template-areas:
    "fig content aside";
  gap: 0 32px;
  align-items: start;
}

.layout-with-aside {
  grid-template-columns: 64px 1fr 280px;
}

.content-figure {
  grid-area: fig;
  position: sticky;
  top: calc(var(--nav-h) + 24px);
}

.deco-filmstrip {
  width: 32px;
  min-height: 200px;
  background:
    repeating-linear-gradient(
      to bottom,
      transparent 0,
      transparent 18px,
      var(--c-gold-mid) 18px,
      var(--c-gold-mid) 20px
    );
  border-left: 2px solid var(--c-gold);
  border-right: 2px solid var(--c-gold);
  position: relative;
}

.deco-filmstrip::before,
.deco-filmstrip::after {
  content: '';
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  width: 8px;
  height: 8px;
  background: var(--c-gold);
  border-radius: 50%;
}

.deco-filmstrip::before { top: 8px; }
.deco-filmstrip::after { bottom: 8px; }

.content-body {
  grid-area: content;
  min-width: 0;
}

.content-aside {
  grid-area: aside;
  position: sticky;
  top: calc(var(--nav-h) + 24px);
  background: var(--c-dark-2);
  border: 1px solid var(--c-gold-mid);
  padding: 28px 24px;
}

.aside-title {
  font-size: 0.85rem;
  letter-spacing: 0.15em;
  color: var(--c-gold);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.aside-subtitle {
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  color: var(--c-gold);
  margin: 24px 0 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.aside-deco {
  color: var(--c-gold);
  font-size: 0.7rem;
}

.content-aside nav dl {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.content-aside nav dt a,
.content-aside nav dd a {
  display: block;
  padding: 8px 0;
  min-height: 40px;
  font-size: 0.85rem;
  color: var(--c-cream-mid);
  border-bottom: 1px solid rgba(201,168,76,0.08);
  transition: color var(--trans-base), padding-left var(--trans-base);
  text-decoration: none;
}

.content-aside nav dt a:hover,
.content-aside nav dd a:hover {
  color: var(--c-gold);
  padding-left: 8px;
  text-decoration: none;
}

/* ===========================
   正文内容
   =========================== */
.page-content-block {
  color: var(--c-cream-mid);
  font-size: 1rem;
  line-height: 1.8;
}

.page-content-block h2 {
  font-size: 1.4rem;
  color: var(--c-cream);
  margin: 2em 0 0.8em;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--c-gold-mid);
}

.page-content-block h3 {
  font-size: 1.15rem;
  color: var(--c-cream);
  margin: 1.5em 0 0.6em;
}

.page-content-block p {
  margin-bottom: 1.2em;
}

.page-content-block ul, .page-content-block ol {
  list-style: disc;
  padding-left: 1.5em;
  margin-bottom: 1.2em;
}

.page-content-block li {
  margin-bottom: 0.4em;
  color: var(--c-cream-mid);
}

.page-content-block a {
  color: var(--c-gold);
  text-decoration: underline;
}

.page-content-block a:hover {
  color: var(--c-cream);
}

.page-date {
  display: block;
  font-size: 0.78rem;
  color: var(--c-gold);
  letter-spacing: 0.1em;
  margin-bottom: 24px;
}

/* ===========================
   卡片公共：底部强调线、圆角0
   =========================== */
.card-accent-line {
  height: 3px;
  background: linear-gradient(90deg, var(--c-gold) 0%, transparent 100%);
  margin-top: auto;
}

/* ===========================
   首页频道卡片
   =========================== */
.section-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 40px;
  padding: 0 24px;
  max-width: var(--content-w);
  margin-left: auto;
  margin-right: auto;
}

.section-title {
  font-size: 1.6rem;
  color: var(--c-cream);
  display: flex;
  align-items: center;
  gap: 8px;
}

.title-deco {
  color: var(--c-gold);
  font-size: 1rem;
}

.section-sub {
  font-size: 0.8rem;
  color: var(--c-cream-mid);
  letter-spacing: 0.08em;
}

.section-more {
  font-size: 0.82rem;
  color: var(--c-gold);
  letter-spacing: 0.08em;
  text-decoration: none;
  border-bottom: 1px solid var(--c-gold-mid);
  padding-bottom: 2px;
  transition: color var(--trans-base);
}

.section-more:hover {
  color: var(--c-cream);
  text-decoration: none;
}

.channels-section {
  padding: 72px 0;
  background: var(--c-dark-2);
}

.channels-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 0;
  max-width: var(--content-w);
  margin: 0 auto;
  padding: 0 24px;
}

.channel-card {
  display: flex;
  flex-direction: column;
  background: var(--c-dark-3);
  border: 1px solid var(--c-gold-dim);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform var(--trans-slow), border-color var(--trans-base);
  position: relative;
}

.channel-card:hover {
  transform: translateY(-4px);
  border-color: var(--c-gold);
}

.card-img {
  width: 100%;
  height: 180px;
  object-fit: cover;
  filter: sepia(0.3) contrast(1.05);
  transition: filter var(--trans-slow);
}

.channel-card:hover .card-img {
  filter: sepia(0.1) contrast(1.1);
}

.card-body {
  padding: 24px;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.card-title {
  font-size: 1.2rem;
  color: var(--c-cream);
  display: flex;
  align-items: center;
  gap: 8px;
}

.deco-num {
  color: var(--c-gold);
  font-size: 0.8rem;
}

.card-desc {
  font-size: 0.88rem;
  color: var(--c-cream-mid);
  line-height: 1.6;
  flex: 1;
}

.sub-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.sub-link {
  font-size: 0.75rem;
  color: var(--c-cream-mid);
  border: 1px solid var(--c-gold-dim);
  padding: 4px 10px;
  min-height: 28px;
  display: inline-flex;
  align-items: center;
  transition: all var(--trans-base);
  text-decoration: none;
}

.sub-link:hover {
  color: var(--c-gold);
  border-color: var(--c-gold);
  text-decoration: none;
}

.card-cta {
  display: inline-block;
  padding: 10px 24px;
  min-height: 44px;
  border: 1px solid var(--c-gold);
  color: var(--c-gold);
  font-size: 0.82rem;
  letter-spacing: 0.1em;
  text-align: center;
  text-decoration: none;
  transition: all var(--trans-base);
  align-self: flex-start;
}

.card-cta:hover {
  background: var(--c-gold);
  color: var(--c-bg);
  text-decoration: none;
}

/* ===========================
   首页文章卡片
   =========================== */
.articles-section {
  padding: 72px 0;
}

.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1px;
  max-width: var(--content-w);
  margin: 0 auto;
  padding: 0 24px;
  background: var(--c-gold-dim);
}

.art-card {
  display: flex;
  flex-direction: column;
  background: var(--c-bg);
  transition: background var(--trans-base);
}

.art-card:hover {
  background: var(--c-dark-3);
}

.art-card-inner {
  padding: 28px 24px;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.art-tag {
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  color: var(--c-gold);
  border: 1px solid var(--c-gold-mid);
  padding: 3px 10px;
  align-self: flex-start;
}

.art-title {
  font-size: 1.05rem;
  color: var(--c-cream);
  line-height: 1.4;
}

.art-desc {
  font-size: 0.85rem;
  color: var(--c-cream-mid);
  line-height: 1.6;
  flex: 1;
}

.art-date {
  font-size: 0.75rem;
  color: var(--c-gold);
  letter-spacing: 0.08em;
}

.art-link {
  font-size: 0.8rem;
  color: var(--c-gold);
  text-decoration: none;
  letter-spacing: 0.08em;
  border-bottom: 1px solid var(--c-gold-mid);
  align-self: flex-start;
  padding-bottom: 2px;
  transition: color var(--trans-base);
}

.art-link:hover {
  color: var(--c-cream);
  text-decoration: none;
}

/* ===========================
   频道页 Hero
   =========================== */
.channel-hero {
  height: 55vh;
  min-height: 400px;
  display: flex;
  align-items: flex-end;
  padding-top: var(--nav-h);
  background: linear-gradient(140deg, #0d0d0d 0%, #1a1a1a 100%);
}

.channel-hero-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.25;
  filter: sepia(0.5) contrast(1.1);
}

.channel-hero-content {
  position: relative;
  z-index: 4;
  padding: 48px 48px 56px;
  max-width: var(--content-w);
  width: 100%;
  margin: 0 auto;
}

.channel-h1 {
  font-size: clamp(1.8rem, 4vw, 3rem);
  color: var(--c-cream);
  margin-bottom: 12px;
}

.channel-hero-desc {
  font-size: 1rem;
  color: var(--c-cream-mid);
  max-width: 540px;
}

.gold-bar-bottom {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--c-gold) 30%, var(--c-gold) 70%, transparent);
  z-index: 5;
}

/* ===========================
   频道子页列表
   =========================== */
.channel-main {
  padding-bottom: 72px;
}

.subpages-section {
  max-width: var(--content-w);
  margin: 0 auto;
  padding: 64px 24px;
}

.sub-card {
  display: grid;
  grid-template-columns: auto 1fr;
  background: var(--c-dark-2);
  border: 1px solid var(--c-gold-dim);
  margin-bottom: 1px;
  transition: border-color var(--trans-base), transform var(--trans-base);
  overflow: hidden;
  flex-direction: column;
}

.sub-card:hover {
  border-color: var(--c-gold);
  transform: translateX(4px);
}

.sub-card-img {
  grid-column: 1;
  width: 200px;
  height: 140px;
  object-fit: cover;
  filter: sepia(0.3);
  transition: filter var(--trans-slow);
}

.sub-card:hover .sub-card-img {
  filter: sepia(0.1);
}

.sub-card-body {
  grid-column: 2;
  padding: 24px 28px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.sub-card-title {
  font-size: 1.15rem;
  color: var(--c-cream);
  display: flex;
  align-items: baseline;
  gap: 12px;
}

.card-num {
  font-family: var(--font-title);
  font-size: 1.8rem;
  color: var(--c-gold-mid);
  line-height: 1;
}

.sub-card-desc {
  font-size: 0.88rem;
  color: var(--c-cream-mid);
  line-height: 1.65;
}

.sub-card-link {
  font-size: 0.8rem;
  color: var(--c-gold);
  letter-spacing: 0.1em;
  text-decoration: none;
  align-self: flex-start;
  padding: 6px 18px;
  min-height: 40px;
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--c-gold-mid);
  transition: all var(--trans-base);
}

.sub-card-link:hover {
  background: var(--c-gold);
  color: var(--c-bg);
  text-decoration: none;
}

/* stagger 动画 */
.stagger-item {
  opacity: 0;
  transform: translateY(20px);
  animation: staggerIn 0.5s ease forwards;
  animation-delay: calc(var(--stagger-i, 0) * 0.08s);
}

@keyframes staggerIn {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ===========================
   文章页 Hero
   =========================== */
.article-hero {
  min-height: 50vh;
  display: flex;
  align-items: flex-end;
  padding-top: var(--nav-h);
  background: linear-gradient(160deg, #0d0d0d 0%, #1a1a1a 100%);
}

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

.article-hero-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.2;
  filter: sepia(0.5) contrast(1.1);
}

.article-hero-placeholder {
  position: absolute;
  inset: 0;
  background:
    repeating-linear-gradient(
      45deg,
      transparent,
      transparent 60px,
      rgba(201,168,76,0.04) 60px,
      rgba(201,168,76,0.04) 62px
    );
}

.article-hero-content {
  position: relative;
  z-index: 4;
  padding: 48px 48px 56px;
  max-width: var(--content-w);
  width: 100%;
  margin: 0 auto;
}

.article-h1 {
  font-size: clamp(1.6rem, 3.5vw, 2.6rem);
  color: var(--c-cream);
  margin: 16px 0 20px;
}

.article-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.8rem;
}

.art-pub-date, .art-mod-date {
  color: var(--c-gold);
  letter-spacing: 0.06em;
}

.art-channel {
  color: var(--c-cream-mid);
  border: 1px solid var(--c-gold-dim);
  padding: 3px 12px;
  min-height: 28px;
  display: inline-flex;
  align-items: center;
  font-size: 0.78rem;
  text-decoration: none;
  transition: all var(--trans-base);
}

.art-channel:hover {
  border-color: var(--c-gold);
  color: var(--c-gold);
  text-decoration: none;
}

/* 面包屑 */
.breadcrumb {
  font-size: 0.78rem;
  color: var(--c-cream-mid);
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 4px;
}

.breadcrumb a {
  color: var(--c-cream-mid);
  text-decoration: none;
  transition: color var(--trans-base);
  min-height: 28px;
  display: inline-flex;
  align-items: center;
}

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

/* ===========================
   文章正文
   =========================== */
.article-main {
  padding-bottom: 80px;
}

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

.article-content {
  font-size: 1.05rem;
  line-height: 1.85;
  color: var(--c-cream-mid);
}

.article-content h2 {
  font-size: 1.35rem;
  color: var(--c-cream);
  margin: 2em 0 0.75em;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--c-gold-mid);
}

.article-content h3 {
  font-size: 1.1rem;
  color: var(--c-cream);
  margin: 1.5em 0 0.6em;
}

.article-content p {
  margin-bottom: 1.2em;
  color: var(--c-cream-mid);
}

.article-content a {
  color: var(--c-gold);
  text-decoration: underline;
}

.article-content ul, .article-content ol {
  padding-left: 1.5em;
  margin-bottom: 1.2em;
  list-style: disc;
}

.article-content li {
  margin-bottom: 0.4em;
}

.article-footer-nav {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid var(--c-gold-mid);
}

.back-link, .forward-link {
  font-size: 0.85rem;
  color: var(--c-gold);
  letter-spacing: 0.08em;
  text-decoration: none;
  padding: 10px 20px;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--c-gold-mid);
  transition: all var(--trans-base);
}

.back-link:hover, .forward-link:hover {
  background: var(--c-gold);
  color: var(--c-bg);
  text-decoration: none;
}

/* ===========================
   标签页 Hero & 列表
   =========================== */
.tag-hero {
  height: 42vh;
  min-height: 320px;
  display: flex;
  align-items: flex-end;
  padding-top: var(--nav-h);
  background: linear-gradient(120deg, #100e08 0%, #1a1a1a 100%);
}

.tag-hero-content {
  position: relative;
  z-index: 4;
  padding: 40px 48px 52px;
  max-width: var(--content-w);
  width: 100%;
  margin: 0 auto;
}

.tag-h1 {
  font-size: clamp(1.6rem, 3vw, 2.6rem);
  color: var(--c-cream);
  margin-bottom: 12px;
}

.tag-hero-desc {
  font-size: 0.95rem;
  color: var(--c-cream-mid);
  max-width: 480px;
}

.tag-main {
  padding-bottom: 80px;
}

.tag-articles-section {
  max-width: var(--content-w);
  margin: 0 auto;
  padding: 64px 24px;
}

.tag-articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1px;
  background: var(--c-gold-dim);
}

.tag-art-card {
  display: flex;
  flex-direction: column;
  background: var(--c-bg);
  transition: background var(--trans-base);
}

.tag-art-card:hover {
  background: var(--c-dark-3);
}

.tag-card-inner {
  padding: 28px 24px;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.card-seq {
  font-family: var(--font-title);
  font-size: 2rem;
  color: var(--c-gold-mid);
  line-height: 1;
}

.tag-card-title {
  font-size: 1rem;
  color: var(--c-cream);
  line-height: 1.4;
}

.tag-card-desc {
  font-size: 0.85rem;
  color: var(--c-cream-mid);
  line-height: 1.6;
  flex: 1;
}

.tag-card-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  font-size: 0.75rem;
}

.tag-card-meta time {
  color: var(--c-gold);
}

.tag-card-channel {
  color: var(--c-cream-mid);
  font-size: 0.75rem;
  text-decoration: none;
  border: 1px solid var(--c-gold-dim);
  padding: 2px 8px;
  min-height: 24px;
  display: inline-flex;
  align-items: center;
  transition: all var(--trans-base);
}

.tag-card-channel:hover {
  border-color: var(--c-gold);
  color: var(--c-gold);
  text-decoration: none;
}

.tag-card-link {
  font-size: 0.8rem;
  color: var(--c-gold);
  letter-spacing: 0.08em;
  text-decoration: none;
  align-self: flex-start;
  padding: 6px 16px;
  min-height: 40px;
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--c-gold-mid);
  transition: all var(--trans-base);
}

.tag-card-link:hover {
  background: var(--c-gold);
  color: var(--c-bg);
  text-decoration: none;
}

/* 标签胶囊 */
.tag-pill {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  padding: 4px 12px;
  font-size: 0.78rem;
  border: 1px solid var(--c-gold-mid);
  color: var(--c-cream-mid);
  text-decoration: none;
  transition: all var(--trans-base);
}

.tag-pill:hover {
  background: var(--c-gold);
  color: var(--c-bg);
  border-color: var(--c-gold);
  text-decoration: none;
}

/* ===========================
   About 页
   =========================== */
.about-hero {
  height: 45vh;
  min-height: 320px;
  display: flex;
  align-items: flex-end;
  padding-top: var(--nav-h);
  background: linear-gradient(140deg, #0a0a08 0%, #1a1a1a 100%);
}

.about-hero-content {
  position: relative;
  z-index: 4;
  padding: 40px 48px 52px;
  max-width: var(--content-w);
  width: 100%;
  margin: 0 auto;
}

.about-h1 {
  font-size: clamp(1.8rem, 3.5vw, 2.8rem);
  color: var(--c-cream);
}

.about-main {
  padding-bottom: 80px;
}

.about-figure {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.about-deco-grid {
  width: 32px;
  min-height: 100px;
  background:
    radial-gradient(circle, var(--c-gold) 1px, transparent 1px);
  background-size: 8px 8px;
}

.about-stats-section {
  max-width: var(--content-w);
  margin: 0 auto;
  padding: 0 24px 64px;
}

.stats-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--c-gold-dim);
}

.stat-card {
  background: var(--c-dark-2);
  padding: 40px 32px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: background var(--trans-base);
}

.stat-card:hover {
  background: var(--c-dark-3);
}

.stat-num {
  font-family: var(--font-title);
  font-size: 3rem;
  color: var(--c-gold);
  line-height: 1;
}

.stat-label {
  font-size: 0.9rem;
  color: var(--c-cream-mid);
  letter-spacing: 0.1em;
}

/* ===========================
   Privacy 页
   =========================== */
.privacy-hero {
  height: 38vh;
  min-height: 280px;
  display: flex;
  align-items: flex-end;
  padding-top: var(--nav-h);
  background: linear-gradient(160deg, #0d0d0d 0%, #1a1a1a 100%);
}

.privacy-hero-content {
  position: relative;
  z-index: 4;
  padding: 32px 48px 48px;
  max-width: var(--content-w);
  width: 100%;
  margin: 0 auto;
}

.privacy-h1 {
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  color: var(--c-cream);
  margin-bottom: 12px;
}

.privacy-date {
  font-size: 0.8rem;
  color: var(--c-gold);
  letter-spacing: 0.1em;
}

.privacy-main {
  padding-bottom: 80px;
}

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

.privacy-content {
  font-size: 0.95rem;
  line-height: 1.85;
}

/* ===========================
   页脚
   =========================== */
.site-footer {
  background: var(--c-dark-2);
  border-top: 1px solid var(--c-gold-mid);
  position: relative;
}

.site-footer::before {
  content: '';
  display: block;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--c-gold) 30%, var(--c-gold) 70%, transparent);
}

.site-footer > section {
  display: inline-block;
  vertical-align: top;
}

/* 四栏布局：footer > section×4 + footer-bottom */
.site-footer {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-template-rows: auto auto;
  gap: 0;
}

.footer-nav-section,
.footer-links-section,
.footer-info-section,
.footer-brand-section {
  padding: 48px 32px;
  border-right: 1px solid var(--c-gold-dim);
}

.footer-brand-section {
  border-right: none;
}

.footer-section-title {
  font-size: 0.85rem;
  letter-spacing: 0.2em;
  color: var(--c-gold);
  margin-bottom: 20px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--c-gold-dim);
}

.site-footer nav dl {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.site-footer nav dt a,
.site-footer nav dd a {
  display: block;
  padding: 8px 0;
  min-height: 40px;
  font-size: 0.82rem;
  color: var(--c-cream-mid);
  line-height: 1.4;
  text-decoration: none;
  transition: color var(--trans-base), padding-left var(--trans-base);
}

.site-footer nav dt a:hover,
.site-footer nav dd a:hover {
  color: var(--c-gold);
  padding-left: 6px;
  text-decoration: none;
}

.footer-desc {
  font-size: 0.82rem;
  color: var(--c-cream-mid);
  line-height: 1.7;
}

.footer-bottom {
  grid-column: 1 / -1;
  padding: 20px 32px;
  border-top: 1px solid var(--c-gold-dim);
  text-align: center;
  background: rgba(0,0,0,0.3);
}

.footer-copy {
  font-size: 0.78rem;
  color: rgba(245,240,232,0.35);
  letter-spacing: 0.06em;
}

/* ===========================
   Intersection Observer 触发类
   =========================== */
.io-hidden {
  opacity: 0;
  transform: translateY(24px);
}

.io-visible {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

/* ===========================
   移动端适配 ≤768px
   =========================== */
@media (max-width: 768px) {
  :root {
    --nav-h: 56px;
  }

  .header-inner {
    padding: 0 12px;
  }

  .nav-left dl,
  .nav-right dl {
    gap: 0;
  }

  .nav-left dt a,
  .nav-right dt a {
    font-size: 0.7rem;
    padding: 8px 6px;
    letter-spacing: 0;
  }

  .brand-name {
    font-size: 0.85rem;
  }

  .hero-layer--front {
    padding: 20px 20px 40px;
    align-items: flex-end;
    justify-content: flex-start;
  }

  .hero-content {
    text-align: left;
  }

  .content-section {
    grid-template-columns: 1fr;
    grid-template-areas:
      "content"
      "aside"
      "fig";
    padding: 32px 16px;
  }

  .content-figure {
    display: none;
  }

  .content-aside {
    position: static;
    margin-top: 32px;
  }

  .channels-grid {
    grid-template-columns: 1fr;
    padding: 0 16px;
  }

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

  .sub-card-img {
    width: 100%;
    height: 160px;
  }

  .articles-grid {
    grid-template-columns: 1fr;
    padding: 0 16px;
  }

  .tag-articles-grid {
    grid-template-columns: 1fr;
  }

  .stats-row {
    grid-template-columns: 1fr;
  }

  .site-footer {
    grid-template-columns: 1fr 1fr;
  }

  .footer-nav-section,
  .footer-links-section,
  .footer-info-section,
  .footer-brand-section {
    padding: 32px 20px;
    border-right: none;
    border-bottom: 1px solid var(--c-gold-dim);
  }

  .hero-h1 {
    font-size: 1.8rem;
  }

  .channel-hero-content,
  .article-hero-content,
  .tag-hero-content,
  .about-hero-content,
  .privacy-hero-content {
    padding: 24px 20px 40px;
  }

  .section-header {
    padding: 0 16px;
    flex-direction: column;
    align-items: flex-start;
  }

  .subpages-section {
    padding: 40px 16px;
  }

  .tag-articles-section {
    padding: 40px 16px;
  }

  .about-stats-section {
    padding: 0 16px 40px;
  }

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

@media (max-width: 480px) {
  .site-footer {
    grid-template-columns: 1fr;
  }

  .nav-left dt:nth-child(n+2),
  .nav-right dt:nth-child(n+2) {
    display: none;
  }
}

/* ===========================
   prefers-reduced-motion
   =========================== */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  .stagger-item {
    opacity: 1;
    transform: none;
  }
  .io-hidden {
    opacity: 1;
    transform: none;
  }
  .scroll-line {
    animation: none;
  }
}