/* ═══════════════════════════════════════════
   Dawn Vision — Design System v3
   ═══════════════════════════════════════════
   Design Tokens → Base Styles → Components → Pages
   Naming convention: page-element-modifier
   ═══════════════════════════════════════════ */

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

/* ──────────────────────────────────────────
   DESIGN TOKENS
   ────────────────────────────────────────── */
:root {
  /* ── Colors: Brand ── */
  --color-brand:        #002FA7;   /* International Klein Blue · 主色 */
  --color-brand-deep:   #001a5c;   /* Deep Klein · hover深色 */
  --color-brand-bright: #1a3fd4;   /* Bright Klein · 亮蓝 */
  --color-brand-soft:   rgba(0, 47, 167, 0.06); /* 主色浅底 */

  /* ── Colors: Text ── */
  --color-text:         #0a0a0a;   /* 正文主色 */
  --color-text-soft:    #2a2a2a;   /* 正文次色 */
  --color-text-muted:   #6b6b6b;   /* 弱化文字 (deck/摘要) */
  --color-text-faint:   #999999;   /* 辅助文字 (meta/时间) */
  --color-text-inverse: #ffffff;   /* 深色底白字 */

  /* ── Colors: Background ── */
  --color-bg:           #ffffff;   /* 页面底色 */
  --color-bg-warm:      #fafafa;   /* 暖白 */
  --color-bg-dark:      #0a0a0a;   /* 深色底 */
  --color-bg-brand:     #002FA7;   /* 主色块底 */

  /* ── Colors: Border / Rule ── */
  --color-border:       #d4d4d4;   /* 分割线 */
  --color-border-light: #e8e8e8;   /* 浅分割线 */
  --color-border-brand: #002FA7;   /* 主色分割线 */

  /* ── Colors: Semantic ── */
  --color-white:        #ffffff;
  --color-black:        #000000;

  /* ── Typography: Font Families ── */
  --font-serif:    'Source Serif 4', 'Noto Serif SC', Georgia, 'Times New Roman', serif;
  --font-display:  'Source Serif 4', 'Noto Serif SC', Georgia, serif;
  --font-sans:     'PT Serif', Georgia, serif;

  /* ── Typography: Font Sizes (clamp for responsive) ── */
  --text-xs:       9px;                   /* 栏目标签/大写eyebrow */
  --text-sm:       10px;                  /* meta/byline */
  --text-tag:      11px;                  /* 标签 */
  --text-base:     0.92rem;               /* 卡片摘要/正文 */
  --text-body:     1rem;                  /* 文章正文 */
  --text-deck:     clamp(0.95rem, 1.4vw, 1.05rem); /* 封面deck */
  --text-card:     1.2rem;                /* 卡片标题 */
  --text-lg:       clamp(1.1rem, 2vw, 1.4rem);    /* CAO列表标题 */
  --text-xl:       clamp(1.2rem, 2.5vw, 1.6rem);  /* CAO精选标题 */
  --text-2xl:      clamp(1.6rem, 3.5vw, 2.4rem);  /* 封面大标题 */
  --text-3xl:      clamp(2rem, 4vw, 2.8rem);      /* CAO区块标题 */
  --text-hero:     clamp(2.2rem, 6vw, 4rem);      /* 文章详情hero */
  --text-masthead: clamp(2.6rem, 7vw, 5rem);      /* 首页大标题 */

  /* ── Typography: Weights ── */
  --weight-regular: 400;
  --weight-medium:  600;
  --weight-bold:    700;
  --weight-black:   900;

  /* ── Typography: Line Heights ── */
  --leading-tight:  0.95;
  --leading-snug:   1.15;
  --leading-normal: 1.5;
  --leading-relaxed:1.65;
  --leading-loose:  1.7;

  /* ── Typography: Letter Spacing ── */
  --tracking-tight:  -0.3px;
  --tracking-tighter:-0.8px;
  --tracking-tightest:-1.5px;
  --tracking-wide:   2px;
  --tracking-wider:  3px;
  --tracking-widest: 4px;
  --tracking-max:    5px;

  /* ── Spacing Scale (4px base) ── */
  --space-1:  4px;
  --space-2:  8px;
  --space-3:  12px;
  --space-4:  16px;
  --space-5:  20px;
  --space-6:  24px;
  --space-7:  28px;
  --space-8:  32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-14: 56px;
  --space-16: 64px;
  --space-20: 80px;
  --space-24: 96px;
  --space-30: 120px;

  /* ── Spacing: Semantic ── */
  --gap-sm:   clamp(16px, 2vw, 24px);
  --gap-md:   clamp(24px, 3.5vw, 40px);
  --gap-lg:   clamp(28px, 4vw, 56px);
  --gap-xl:   clamp(40px, 5vw, 64px);
  --gap-2xl:  clamp(48px, 6vw, 72px);
  --gap-3xl:  clamp(64px, 10vw, 120px);

  /* ── Layout: Constraints ── */
  --max-width:      1100px;  /* 内容区最大宽 */
  --max-width-wide: 1200px;  /* 导航/hero最大宽 */
  --max-width-text: 640px;   /* 正文阅读宽度 (measure) */
  --padding-x:      clamp(24px, 5vw, 64px); /* 左右内边距 */
  --padding-x-narrow: clamp(24px, 5vw, 48px);

  /* ── Motion ── */
  --ease-out: cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);
  --duration-fast: 0.15s;
  --duration-base: 0.25s;
  --duration-slow: 0.3s;
  --transition: all var(--duration-base) var(--ease-out);

  /* ── Shadows ── */
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.1);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.12);
  --shadow-cao: 0 8px 32px rgba(0,0,0,0.3);

  /* ── Legacy aliases (for backward compatibility) ── */
  --klein:        var(--color-brand);
  --klein-deep:   var(--color-brand-deep);
  --klein-bright: var(--color-brand-bright);
  --ink:          var(--color-text);
  --ink-soft:     var(--color-text-soft);
  --gray-mid:     var(--color-text-muted);
  --gray-light:   var(--color-text-faint);
  --gray-rule:    var(--color-border);
  --paper:        var(--color-bg);
  --paper-warm:   var(--color-bg-warm);
  --white:        var(--color-white);
  --measure:      var(--max-width-text);
  --serif:        var(--font-serif);
  --serif-display:var(--font-display);
  --sans:         var(--font-sans);
}

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

body {
  font-family: var(--font-serif);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: var(--leading-loose);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ──────────────────────────────────────────
   BASE STYLES
   ────────────────────────────────────────── */
h1, h2, h3, h4 { font-family: var(--font-display); font-weight: var(--weight-bold); line-height: var(--leading-snug); }

a { color: var(--color-brand); text-decoration: none; border-bottom: 1px solid transparent; transition: border-color var(--duration-fast), opacity var(--duration-fast); }
a:hover { border-bottom-color: var(--color-brand); }

/* ── Containers ── */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--padding-x);
}

main {
  flex: 1 0 auto;
}

.container--narrow {
  max-width: var(--max-width-text);
  margin: 0 auto;
  padding: 0 var(--padding-x-narrow);
}

/* ══════════════════════════════════════════
   MASTHEAD / NAVIGATION (Klein Blue full-bleed)
   ══════════════════════════════════════════ */
.masthead {
  background: var(--klein);
  color: var(--white);
  padding: 0;
  margin-bottom: 0;
  border-bottom: none;
  position: relative;
  overflow: hidden;
}

.masthead__nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: clamp(20px, 3vw, 32px) clamp(24px, 5vw, 64px);
  max-width: 1200px;
  margin: 0 auto;
}

.masthead__nav-group {
  display: flex;
  gap: clamp(24px, 4vw, 48px);
  align-items: center;
}

.masthead__nav-link {
  font-size: 11px;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: rgba(255,255,255,0.75);
  font-family: var(--serif-display);
  font-weight: 600;
  border-bottom: none;
  transition: color 0.2s;
}

.masthead__nav-link:hover {
  color: var(--white);
  border-bottom: none;
}

.masthead__nav-brand {
  font-size: clamp(1.3rem, 2.5vw, 1.6rem);
  font-weight: 900;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--white);
  text-align: center;
  line-height: 1;
  border-bottom: none;
}

.masthead__nav-brand:hover { border-bottom: none; opacity: 0.9; }
.masthead__nav-brand small {
  display: block;
  font-size: 0.45em;
  letter-spacing: 5px;
  font-weight: 400;
  opacity: 0.7;
  margin-top: 2px;
}

/* Hero area in masthead */
.masthead__hero {
  padding: clamp(48px, 8vw, 96px) clamp(24px, 5vw, 64px) clamp(56px, 8vw, 88px);
  max-width: 1200px;
  margin: 0 auto;
  position: relative;
}

.masthead__issue-line {
  font-size: 10px;
  letter-spacing: 4px;
  text-transform: uppercase;
  color: rgba(255,255,255,0.6);
  font-family: var(--serif-display);
  font-weight: 600;
  margin-bottom: 24px;
}

.masthead__title {
  font-size: clamp(2.6rem, 7vw, 5rem);
  font-weight: 900;
  letter-spacing: -1.5px;
  line-height: 0.95;
  color: var(--white);
  text-transform: uppercase;
  max-width: 800px;
  margin-bottom: 20px;
}

.masthead__tagline {
  font-size: clamp(0.95rem, 1.8vw, 1.15rem);
  color: rgba(255,255,255,0.65);
  font-style: italic;
  font-family: var(--sans);
  max-width: 520px;
  line-height: 1.5;
  margin-bottom: 32px;
}

.masthead__meta {
  display: flex;
  gap: 20px;
  font-size: 10px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: rgba(255,255,255,0.5);
  font-family: var(--serif-display);
  font-weight: 600;
  flex-wrap: wrap;
}

.masthead__meta span { color: rgba(255,255,255,0.9); }

/* ── Sub-masthead white bar with issue info ── */
.issue-bar {
  background: var(--paper);
  border-bottom: 1px solid var(--gray-rule);
  padding: clamp(16px, 2.5vw, 24px) 0;
}

.issue-bar__inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.issue-bar__label {
  font-size: 10px;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--klein);
  font-family: var(--serif-display);
  font-weight: 700;
}

.issue-bar__date {
  font-size: 12px;
  color: var(--gray-mid);
  font-style: italic;
  font-family: var(--sans);
}

/* ══════════════════════════════════════════
   COVER / LEAD STORY
   ══════════════════════════════════════════ */
.cover {
  padding: clamp(48px, 7vw, 80px) 0 clamp(40px, 5vw, 64px);
  border-bottom: 2px solid var(--ink);
  margin-bottom: clamp(80px, 8vw, 120px);
}

.cover__number {
  font-size: 10px;
  letter-spacing: 4px;
  text-transform: uppercase;
  color: var(--klein);
  font-family: var(--serif-display);
  font-weight: 700;
  margin-bottom: 20px;
}

.cover__link {
  display: block;
  text-decoration: none;
  color: inherit;
  border-bottom: none;
}

.cover__link:hover { border-bottom: none; }
.cover__link:hover .cover__headline { color: var(--klein); }

.cover__headline {
  font-size: clamp(2rem, 5vw, 3.4rem);
  font-weight: 900;
  letter-spacing: -1px;
  line-height: 1.05;
  margin-bottom: 20px;
  max-width: 800px;
  transition: color 0.2s;
}

.cover__deck {
  font-size: clamp(1rem, 1.8vw, 1.2rem);
  color: var(--gray-mid);
  line-height: 1.6;
  font-style: italic;
  font-family: var(--sans);
  max-width: 640px;
  margin-bottom: 20px;
}

.cover__byline {
  font-size: 11px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--gray-light);
  font-family: var(--serif-display);
  font-weight: 600;
}

.cover__byline .arrow { color: var(--klein); margin-left: 8px; }

/* ══════════════════════════════════════════
   SECTION HEADERS
   ══════════════════════════════════════════ */
.section {
  margin-bottom: clamp(48px, 6vw, 72px);
}

.section__head {
  display: flex;
  align-items: baseline;
  gap: 16px;
  margin-bottom: clamp(28px, 4vw, 40px);
  padding-bottom: 12px;
  border-bottom: 1px solid var(--gray-rule);
}

.section__number {
  font-size: 10px;
  letter-spacing: 3px;
  color: var(--klein);
  font-family: var(--serif-display);
  font-weight: 700;
}

.section__title {
  font-size: clamp(1.2rem, 2.2vw, 1.5rem);
  font-weight: 700;
  letter-spacing: -0.3px;
}

/* ══════════════════════════════════════════
   ARTICLE GRID
   ══════════════════════════════════════════ */
.article-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 300px), 1fr));
  gap: clamp(24px, 3.5vw, 40px);
}

.article-card {
  display: block;
  text-decoration: none;
  color: inherit;
  padding: 0 0 clamp(20px, 2.5vw, 28px) 0;
  border-bottom: 1px solid var(--gray-rule);
  transition: transform 0.25s cubic-bezier(0.25, 0.46, 0.45, 0.94), border-color 0.25s ease;
  border-bottom-color: var(--gray-rule);
  position: relative;
}

.article-card:hover {
  transform: translateY(-3px);
  border-bottom-color: var(--klein);
}

.article-card:hover .article-card__title {
  color: var(--klein-deep);
}

.article-card:hover .article-card__excerpt {
  color: var(--ink-soft);
}

.article-card::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--klein);
  transition: width 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.article-card:hover::after {
  width: 100%;
}

.article-card__tag {
  display: inline-block;
  font-size: 11px;
  letter-spacing: 0;
  color: var(--klein);
  font-family: var(--serif);
  font-weight: 400;
  margin-bottom: 12px;
  background: rgba(0, 47, 167, 0.06);
  padding: 4px 10px;
  border-radius: 0;
  text-transform: none;
}

.article-card__title {
  font-size: 1.2rem;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 10px;
  letter-spacing: -0.2px;
  color: var(--klein);
  transition: color 0.2s ease;
}

.article-card__excerpt {
  font-size: 0.92rem;
  color: var(--gray-mid);
  line-height: 1.65;
  font-family: var(--sans);
}

/* Cover story link */
.cover-story-link {
  display: block;
  text-decoration: none;
  color: inherit;
  border-bottom: none;
  transition: transform 0.25s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  padding: 4px 0;
}
.cover-story-link:hover {
  transform: translateX(6px);
  border-bottom: none;
}
.cover-story-title {
  font-size: clamp(1.6rem, 3.5vw, 2.4rem);
  font-weight: 900;
  letter-spacing: -0.8px;
  line-height: 1.15;
  margin-bottom: 16px;
  max-width: 860px;
  color: var(--klein);
  transition: color 0.2s ease;
}
.cover-story-deck {
  font-size: clamp(0.95rem, 1.4vw, 1.05rem);
  color: var(--gray-mid);
  line-height: 1.65;
  font-style: italic;
  font-family: var(--sans);
  max-width: 640px;
  margin-bottom: 16px;
  transition: color 0.2s ease;
}
.cover-story-link:hover .cover-story-deck {
  color: var(--ink-soft);
}
.cover-story-byline {
  font-size: 10px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--gray-light);
  font-family: var(--serif-display);
  font-weight: 600;
}

/* ══════════════════════════════════════════
   CAO SECTION (humor)
   ══════════════════════════════════════════ */
.cao-section {
  background: var(--klein);
  color: var(--white);
  margin: 0 calc(-50vw + 50%);
  padding: clamp(24px, 3vw, 40px) calc(50vw - 550px) clamp(28px, 3vw, 40px);
}

@media (max-width: 1150px) {
  .cao-section {
    padding-left: clamp(24px, 5vw, 64px);
    padding-right: clamp(24px, 5vw, 64px);
  }
}

.cao-section .section__head {
  border-bottom-color: rgba(255,255,255,0.2);
  margin-bottom: 28px;
}

.cao-section .section__number { color: rgba(255,255,255,0.7); }
.cao-section .section__title { color: var(--white); }
.cao-section .section-label { color: rgba(255,255,255,0.6); border-bottom-color: rgba(255,255,255,0.2); }

/* Cao section inline article (used in articles listing page) */
.cao-section .cao-featured {
  display: block;
  text-decoration: none;
  color: inherit;
  border-bottom: none;
  transition: transform 0.25s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  padding: 4px 0;
}
.cao-section .cao-featured:hover {
  transform: translateX(6px);
  border-bottom: none;
}
.cao-section .cao-featured h3 {
  transition: color 0.2s ease;
}
.cao-section .cao-featured:hover h3 {
  color: #fff !important;
}
.cao-section .cao-featured:hover p {
  color: rgba(255,255,255,0.7) !important;
}
.cao-section .cao-more-link {
  font-size: 9px;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: rgba(255,255,255,0.4);
  font-family: var(--serif-display);
  font-weight: 700;
  text-decoration: none;
  border-bottom: 1px solid rgba(255,255,255,0.2);
  padding-bottom: 2px;
  transition: color 0.2s, border-color 0.2s;
}
.cao-section .cao-more-link:hover {
  color: rgba(255,255,255,0.85);
  border-bottom-color: rgba(255,255,255,0.7);
}

.cao-card {
  display: block;
  text-decoration: none;
  color: var(--white);
  padding: clamp(20px, 3vw, 32px);
  border: 1px solid rgba(255,255,255,0.25);
  background: rgba(255,255,255,0.05);
  transition: background 0.25s ease, border-color 0.25s ease, transform 0.25s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  border-bottom: 1px solid rgba(255,255,255,0.25);
  position: relative;
  overflow: hidden;
}

.cao-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255,255,255,0);
  transition: background 0.25s ease;
  pointer-events: none;
}

.cao-card:hover {
  background: rgba(255,255,255,0.12);
  border-color: rgba(255,255,255,0.6);
  transform: translateY(-3px);
  box-shadow: 0 8px 32px rgba(0,0,0,0.3);
}

.cao-card:hover .cao-card__title {
  color: var(--white);
}

.cao-card:hover .cao-card__excerpt {
  color: rgba(255,255,255,0.8);
}

.cao-card__tag {
  font-size: 9px;
  letter-spacing: 2.5px;
  text-transform: uppercase;
  color: rgba(255,255,255,0.6);
  font-family: var(--serif-display);
  font-weight: 700;
  margin-bottom: 8px;
}

.cao-card__title {
  font-size: 1.2rem;
  font-weight: 700;
  line-height: 1.25;
  margin-bottom: 8px;
  letter-spacing: -0.2px;
}

.cao-card__excerpt {
  font-size: 0.9rem;
  color: rgba(255,255,255,0.65);
  line-height: 1.55;
  font-style: italic;
  font-family: var(--sans);
}

/* ══════════════════════════════════════════
   STATS BAR
   ══════════════════════════════════════════ */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin: clamp(48px, 6vw, 72px) 0;
  padding: clamp(28px, 4vw, 44px) 0;
  border-top: 2px solid var(--ink);
  border-bottom: 1px solid var(--gray-rule);
  text-align: center;
}

.stat-item__num {
  font-size: clamp(2rem, 4.5vw, 3rem);
  font-weight: 900;
  color: var(--klein);
  line-height: 1;
  font-family: var(--serif-display);
}

.stat-item__label {
  font-size: 9px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--gray-light);
  margin-top: 8px;
  font-family: var(--serif-display);
  font-weight: 600;
}

/* ══════════════════════════════════════════
   ABOUT / COLOPHON
   ══════════════════════════════════════════ */
.colophon {
  margin: clamp(48px, 6vw, 72px) 0;
  padding: clamp(32px, 5vw, 48px);
  border: 1px solid var(--gray-rule);
  text-align: center;
}

.colophon__title {
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 3px;
  text-transform: uppercase;
  margin-bottom: 12px;
  color: var(--klein);
  font-family: var(--serif-display);
}

.colophon__text {
  font-size: 0.9rem;
  color: var(--gray-mid);
  max-width: 480px;
  margin: 0 auto 12px;
  font-style: italic;
  font-family: var(--sans);
  line-height: 1.6;
}

.colophon__meta {
  font-size: 9px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--gray-light);
  font-family: var(--serif-display);
  font-weight: 600;
}

/* ══════════════════════════════════════════
   ARTICLE PAGE
   ══════════════════════════════════════════ */
.article-page { padding-bottom: clamp(48px, 8vw, 96px); }

.article-page__header {
  padding: clamp(48px, 8vw, 80px) 0 clamp(32px, 5vw, 48px);
  border-bottom: 2px solid var(--ink);
  margin-bottom: clamp(40px, 6vw, 64px);
}

.article-page__tag {
  font-size: 10px;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--klein);
  font-family: var(--serif-display);
  font-weight: 700;
  margin-bottom: 20px;
}

.article-page__title {
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 900;
  letter-spacing: -1px;
  line-height: 1.08;
  margin-bottom: 20px;
  max-width: 760px;
}

.article-page__deck {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--gray-mid);
  font-style: italic;
  line-height: 1.55;
  font-family: var(--sans);
  margin-bottom: 24px;
  max-width: 620px;
}

.article-page__meta {
  display: flex;
  gap: 24px;
  font-size: 10px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--gray-light);
  font-family: var(--serif-display);
  font-weight: 600;
  flex-wrap: wrap;
}

.article-page__back {
  display: inline-block;
  font-size: 10px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--gray-light);
  font-family: var(--serif-display);
  font-weight: 600;
  margin-bottom: clamp(32px, 5vw, 48px);
  border-bottom: none;
}

.article-page__back:hover { color: var(--klein); border-bottom: none; }

/* Article hero (Klein Blue block for cover story articles) */
.article-page__hero {
  background: var(--klein);
  color: var(--white);
  margin: 0 calc(-50vw + 50%) clamp(48px, 6vw, 72px);
  padding: clamp(64px, 10vw, 120px) clamp(24px, 5vw, 64px);
  position: relative;
  overflow: hidden;
}

.article-page__hero-inner {
  max-width: var(--measure);
  margin: 0 auto;
}

.article-page__hero-label {
  font-size: 10px;
  letter-spacing: 4px;
  text-transform: uppercase;
  color: rgba(255,255,255,0.5);
  font-family: var(--serif-display);
  font-weight: 700;
  margin-bottom: 24px;
}

.article-page__hero-title {
  font-size: clamp(2.2rem, 6vw, 4rem);
  font-weight: 900;
  letter-spacing: -1.5px;
  line-height: 0.98;
  text-transform: uppercase;
  margin-bottom: 20px;
}

.article-page__hero-deck {
  font-size: clamp(1rem, 1.8vw, 1.2rem);
  color: rgba(255,255,255,0.65);
  font-style: italic;
  font-family: var(--sans);
  line-height: 1.5;
  max-width: 520px;
}

/* Article content */
.article-page__content {
  font-size: clamp(1rem, 1.6vw, 1.1rem);
  line-height: 1.85;
  color: var(--ink-soft);
}

.article-page__content p { margin-bottom: 1.4em; }

.article-page__content p:first-of-type::first-letter {
  font-size: 3.8em;
  float: left;
  line-height: 0.78;
  margin: 0.04em 0.12em 0 0;
  font-weight: 900;
  color: var(--klein);
}

.article-page__content h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin: 2.2em 0 0.6em;
  padding-top: 0.8em;
  border-top: 1px solid var(--gray-rule);
  letter-spacing: -0.3px;
}

.article-page__content h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin: 1.6em 0 0.4em;
  color: var(--ink);
}

.article-page__content blockquote {
  margin: 2em 0;
  padding: 0.5em 0 0.5em 1.2em;
  border-left: 3px solid var(--klein);
  font-style: italic;
  color: var(--ink);
  font-size: 1.15em;
  line-height: 1.5;
}

.article-page__content ul, .article-page__content ol {
  margin: 1em 0 1.5em;
  padding-left: 1.5em;
}

.article-page__content li { margin-bottom: 0.5em; }
.article-page__content strong { color: var(--ink); font-weight: 700; }

.article-page__content hr {
  border: none;
  border-top: 1px solid var(--gray-rule);
  margin: 2.5em 0;
  width: 48px;
}

.article-page__footnote {
  margin-top: clamp(40px, 6vw, 64px);
  padding-top: 24px;
  border-top: 1px solid var(--gray-rule);
  font-size: 0.8rem;
  color: var(--gray-light);
  font-style: italic;
  font-family: var(--sans);
  line-height: 1.6;
}

.article-page__footnote a { color: var(--gray-mid); }

/* Pull quote (used in articles) */
.pull-quote {
  margin: 2.5em 0;
  padding: 0.5em 0 0.5em 1.2em;
  border-left: 4px solid var(--klein);
  font-size: 1.3em;
  font-weight: 700;
  font-style: italic;
  line-height: 1.35;
  color: var(--ink);
}

.pull-quote__attr {
  display: block;
  font-size: 0.6em;
  font-weight: 400;
  color: var(--gray-mid);
  margin-top: 0.5em;
  font-style: normal;
  font-family: var(--sans);
  letter-spacing: 1px;
  text-transform: uppercase;
}

/* Cao article badge */
.cao-badge {
  display: inline-block;
  font-size: 9px;
  letter-spacing: 3px;
  text-transform: uppercase;
  background: var(--klein);
  color: var(--white);
  padding: 4px 10px;
  margin-bottom: 16px;
  font-family: var(--serif-display);
  font-weight: 700;
}

/* ══════════════════════════════════════════
   FOOTER
   ══════════════════════════════════════════ */
.site-footer {
  background: var(--klein);
  color: var(--white);
  padding: clamp(28px, 4vw, 40px) 0 clamp(24px, 3vw, 32px);
  margin-top: 0;
  flex-shrink: 0;
}

.site-footer .container {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 12px;
}

.site-footer__brand {
  font-size: 1.1rem;
  font-weight: 900;
  letter-spacing: 2px;
  text-transform: uppercase;
}

.site-footer__meta {
  font-size: 10px;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: rgba(255,255,255,0.6);
  font-family: var(--serif-display);
  font-weight: 600;
}

/* ══════════════════════════════════════════
   RESPONSIVE / MOBILE
   ══════════════════════════════════════════ */
@media (max-width: 700px) {
  .masthead__nav { flex-wrap: wrap; gap: 12px; padding: 16px 24px; }
  .masthead__nav-group { gap: 16px; }
  .masthead__nav-brand { font-size: 1rem; letter-spacing: 2px; order: -1; width: 100%; text-align: left; margin-bottom: 4px; }
  .masthead__nav-brand small { display: inline; font-size: 0.5em; letter-spacing: 3px; margin-left: 8px; }
  .masthead__hero { padding: 40px 24px 56px; }
  .article-grid { grid-template-columns: 1fr; }
  .stats-bar { grid-template-columns: repeat(2, 1fr); gap: 24px; }
  .cover__headline { font-size: 2rem; }
}

@media (max-width: 480px) {
  html { font-size: 15px; }
  .container { padding: 0 20px; }
  .container--narrow { padding: 0 20px; }
  .masthead__nav-group .masthead__nav-link { font-size: 9px; letter-spacing: 2px; }
  .masthead__title { font-size: 2.4rem; }
  .article-page__title { font-size: 1.8rem; }
  .colophon { padding: 24px 20px; }
}

/* ══════════════════════════════════════════
   DARK MODE
   ══════════════════════════════════════════ */
@media (prefers-color-scheme: dark) {
  :root {
    --ink: #f0f0f0;
    --ink-soft: #c8c8c8;
    --gray-mid: #8a8a8a;
    --gray-light: #5a5a5a;
    --gray-rule: #2a2a2a;
    --paper: #0a0a0a;
    --paper-warm: #111111;
  }
  .site-footer { background: var(--klein-deep); }
}

/* ══════════════════════════════════════════
   HOME — FULL SCREEN KLEIN BLUE GRADIENT
   ══════════════════════════════════════════ */
.home {
  min-height: 100vh;
  background: var(--klein);
  color: var(--white);
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

/* Fluid gradient blob animation */
.home__gradient {
  position: absolute;
  inset: 0;
  overflow: hidden;
  z-index: 0;
}

.home__blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(100px);
  opacity: 0.65;
  animation: blobFloat 20s ease-in-out infinite;
  will-change: transform;
}

.home__blob--1 {
  width: 55vw;
  height: 55vw;
  background: radial-gradient(circle, #4a7dff 0%, transparent 70%);
  top: -10%;
  left: -8%;
  animation-delay: 0s;
  animation-duration: 25s;
}

.home__blob--2 {
  width: 50vw;
  height: 50vw;
  background: radial-gradient(circle, #000a2e 0%, transparent 70%);
  bottom: -8%;
  right: -5%;
  animation-delay: -7s;
  animation-duration: 22s;
  opacity: 0.75;
}

.home__blob--3 {
  width: 42vw;
  height: 42vw;
  background: radial-gradient(circle, #1535b8 0%, transparent 70%);
  top: 25%;
  right: 8%;
  animation-delay: -14s;
  animation-duration: 28s;
}

.home__blob--4 {
  width: 45vw;
  height: 45vw;
  background: radial-gradient(circle, #6b3fff 0%, transparent 70%);
  bottom: 15%;
  left: -8%;
  animation-delay: -4s;
  animation-duration: 30s;
  opacity: 0.5;
}

.home__blob--5 {
  width: 32vw;
  height: 32vw;
  background: radial-gradient(circle, #0066ff 0%, transparent 70%);
  top: 8%;
  left: 35%;
  animation-delay: -10s;
  animation-duration: 35s;
  opacity: 0.55;
}

.home__blob--6 {
  width: 28vw;
  height: 28vw;
  background: radial-gradient(circle, #e09540 0%, transparent 70%);
  top: 55%;
  right: 12%;
  animation-delay: -18s;
  animation-duration: 32s;
  opacity: 0.4;
}

@keyframes blobFloat {
  0%, 100% { transform: translate(0, 0) scale(1); }
  20% { transform: translate(5vw, 8vh) scale(1.1); }
  40% { transform: translate(-3vw, -5vh) scale(0.95); }
  60% { transform: translate(8vw, -3vh) scale(1.05); }
  80% { transform: translate(-5vw, 6vh) scale(0.98); }
}

/* Home nav */
.home__nav {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  padding: clamp(20px, 3vw, 32px) clamp(24px, 5vw, 64px);
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
}

.home__nav-group { display: flex; gap: clamp(24px, 4vw, 48px); align-items: center; }
.home__nav-group:last-child { justify-content: flex-end; }

.home__nav-link {
  font-size: 11px;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: rgba(255,255,255,0.6);
  font-family: var(--serif-display);
  font-weight: 600;
  border-bottom: none;
  transition: color 0.2s;
}
.home__nav-link:hover, .home__nav-link--active { color: var(--white); border-bottom: none; }

.home__nav-brand {
  font-size: clamp(1.3rem, 2.5vw, 1.6rem);
  font-weight: 900;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--white);
  text-align: center;
  line-height: 1;
  border-bottom: none;
}
.home__nav-brand:hover { border-bottom: none; opacity: 0.9; }
.home__nav-brand small { display: block; font-size: 0.45em; letter-spacing: 5px; font-weight: 400; opacity: 0.6; margin-top: 2px; }

/* Home hero content */
.home__hero {
  position: relative;
  z-index: 1;
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: clamp(32px, 5vw, 64px);
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
}

.home__brand {
  font-size: clamp(0.7rem, 1.2vw, 0.8rem);
  letter-spacing: 6px;
  text-transform: uppercase;
  color: rgba(255,255,255,0.45);
  font-family: var(--serif-display);
  font-weight: 600;
  margin-bottom: 32px;
}

.home__title {
  font-size: clamp(2.8rem, 7vw, 5.5rem);
  font-weight: 900;
  letter-spacing: -2px;
  line-height: 0.92;
  color: var(--white);
  text-transform: uppercase;
  max-width: 900px;
  margin-bottom: 24px;
}

.home__tagline {
  font-size: clamp(1rem, 2vw, 1.3rem);
  color: rgba(255,255,255,0.6);
  font-style: italic;
  font-family: var(--sans);
  max-width: 520px;
  line-height: 1.6;
  margin-bottom: 48px;
}

/* Today's cover teaser on home - white card */
.home__teaser {
  background: var(--white);
  color: var(--ink);
  padding: clamp(28px, 4vw, 40px);
  max-width: 580px;
  margin-bottom: clamp(80px, 8vw, 120px);
  position: relative;
  z-index: 1;
}

.home__teaser-label {
  font-size: 9px;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--klein);
  font-family: var(--serif-display);
  font-weight: 700;
  margin-bottom: 14px;
}

.home__teaser-title {
  font-size: clamp(1.2rem, 2.2vw, 1.5rem);
  font-weight: 700;
  line-height: 1.25;
  color: var(--ink);
  margin-bottom: 12px;
  letter-spacing: -0.3px;
}

.home__teaser-deck {
  font-size: 0.9rem;
  color: var(--gray-mid);
  line-height: 1.6;
  font-style: italic;
  font-family: var(--sans);
  margin-bottom: 24px;
}

/* More button - Klein blue on white card */
.btn-more {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 10px;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--white);
  background: var(--klein);
  font-family: var(--serif-display);
  font-weight: 700;
  text-decoration: none;
  border: none;
  padding: 14px 28px;
  transition: all 0.25s;
  border-radius: 0;
}
.btn-more:hover {
  background: var(--klein-deep);
  color: var(--white);
}
.btn-more .arrow { transition: transform 0.25s; font-size: 1.2em; line-height: 1; }
.btn-more:hover .arrow { transform: translateX(4px); }

/* Home footer */
.home__footer {
  position: relative;
  z-index: 1;
  padding: clamp(16px, 2vw, 24px) clamp(24px, 5vw, 64px);
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 9px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: rgba(255,255,255,0.3);
  font-family: var(--serif-display);
  font-weight: 600;
}

/* ══════════════════════════════════════════
   INNER PAGE NAV (white background)
   ══════════════════════════════════════════ */
.inner-nav {
  background: var(--paper);
  border-bottom: none;
  padding: 0;
}

.inner-nav__inner {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  padding: clamp(20px, 3vw, 32px) 0;
  max-width: 1200px;
  margin: 0 auto;
  padding-left: clamp(24px, 5vw, 64px);
  padding-right: clamp(24px, 5vw, 64px);
}

.inner-nav__group { display: flex; gap: clamp(24px, 4vw, 48px); align-items: center; }
.inner-nav__group:last-child { justify-content: flex-end; }

.inner-nav__link {
  font-size: 11px;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: rgba(0,0,0,0.4);
  font-family: var(--serif-display);
  font-weight: 600;
  border-bottom: none;
  transition: color 0.2s;
}
.inner-nav__link:hover, .inner-nav__link--active { color: var(--ink); border-bottom: none; }

.inner-nav__brand {
  font-size: clamp(1.3rem, 2.5vw, 1.6rem);
  font-weight: 900;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--ink);
  text-align: center;
  line-height: 1;
  border-bottom: none;
}
.inner-nav__brand:hover { border-bottom: none; opacity: 0.7; }
.inner-nav__brand small { display: block; font-size: 0.45em; letter-spacing: 5px; font-weight: 400; color: var(--gray-light); margin-top: 2px; }

/* ══════════════════════════════════════════
   ISSUE FILTER — 四级联动期数筛选器
   ══════════════════════════════════════════ */
.issue-filter {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: clamp(16px, 2vw, 24px) 0 clamp(12px, 1.5vw, 16px);
  margin-bottom: clamp(16px, 2vw, 24px);
  flex-wrap: nowrap;
}

.issue-filter__current {
  display: inline-block;
  font-size: clamp(1rem, 1.8vw, 1.2rem);
  font-weight: 700;
  letter-spacing: -0.3px;
  color: var(--ink);
  white-space: nowrap;
  flex-shrink: 0;
}

.issue-filter__row {
  display: flex;
  gap: 8px;
  flex-wrap: nowrap;
  align-items: center;
  flex: 1;
  min-width: 0;
}

.issue-filter__select {
  appearance: none;
  -webkit-appearance: none;
  background: var(--paper);
  border: 1px solid var(--gray-rule);
  padding: 7px 30px 7px 10px;
  font-size: 11px;
  letter-spacing: 0.3px;
  font-family: var(--serif-display);
  font-weight: 600;
  color: var(--ink);
  cursor: pointer;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6' viewBox='0 0 10 6'%3E%3Cpath d='M1 1l4 4 4-4' stroke='%23002FA7' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
  background-size: 8px 5px;
  border-radius: 0;
  transition: border-color 0.2s ease, background 0.2s ease;
  min-width: 0;
  flex: 1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  position: relative;
}
.issue-filter__select:hover { border-color: var(--klein); }
.issue-filter__select:focus { outline: none; border-color: var(--klein); background: rgba(0, 47, 167, 0.04); }
.issue-filter__select:disabled { opacity: 0.4; cursor: not-allowed; }

/* ══════════════════════════════════════════
   PAGINATION — 底部分页
   ══════════════════════════════════════════ */
.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  padding: clamp(32px, 5vw, 56px) 0 clamp(24px, 3vw, 40px);
  border-top: 1px solid var(--gray-rule);
  margin-top: clamp(24px, 3vw, 40px);
}

.pagination__nav {
  font-size: 11px;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  font-family: var(--serif-display);
  font-weight: 700;
  color: var(--ink);
  text-decoration: none;
  padding: 8px 14px;
  border: 1px solid var(--gray-rule);
  transition: all 0.2s ease;
  white-space: nowrap;
}
.pagination__nav:hover { border-color: var(--klein); color: var(--klein); background: rgba(0, 47, 167, 0.04); }
.pagination__nav--disabled { color: var(--gray-light); border-color: var(--gray-rule); cursor: default; opacity: 0.5; }
.pagination__nav--disabled:hover { border-color: var(--gray-rule); color: var(--gray-light); background: transparent; }

.pagination__pages {
  display: flex;
  gap: 4px;
  align-items: center;
}

.pagination__num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 36px;
  height: 36px;
  font-size: 12px;
  font-family: var(--serif-display);
  font-weight: 600;
  color: var(--gray-mid);
  text-decoration: none;
  border: 1px solid transparent;
  transition: all 0.2s ease;
}
.pagination__num:hover { color: var(--klein); border-color: var(--gray-rule); }
.pagination__num--active {
  color: var(--white);
  background: var(--klein);
  border-color: var(--klein);
  font-weight: 700;
}
.pagination__num--active:hover { color: var(--white); background: var(--klein-deep); border-color: var(--klein-deep); }

.pagination__ellipsis {
  color: var(--gray-light);
  font-size: 12px;
  padding: 0 4px;
}

/* ══════════════════════════════════════════
   ARTICLES PAGE — section titles without numbers
   ══════════════════════════════════════════ */
.section-label {
  display: block;
  width: 100%;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 5px;
  text-transform: uppercase;
  color: var(--white);
  background: var(--klein);
  padding: 16px 24px;
  margin-bottom: 36px;
  margin-top: 8px;
  font-family: var(--serif-display);
}

.section-label span {
  font-weight: 400;
  color: rgba(255,255,255,0.6);
  font-style: italic;
  font-family: var(--sans);
  margin-left: 14px;
  font-size: 0.85em;
  letter-spacing: 2px;
}

/* ══════════════════════════════════════════
   ABOUT PAGE — FULL SCREEN CENTERED
   ══════════════════════════════════════════ */
.about-page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--paper);
}

.about-page__content {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: clamp(40px, 8vw, 80px) clamp(24px, 5vw, 64px);
}

.about-page__name {
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 900;
  letter-spacing: -1px;
  text-transform: uppercase;
  color: var(--ink);
  margin-bottom: 12px;
}

.about-page__subtitle {
  font-size: 10px;
  letter-spacing: 4px;
  text-transform: uppercase;
  color: var(--klein);
  font-family: var(--serif-display);
  font-weight: 700;
  margin-bottom: 40px;
}

.about-page__bio {
  font-size: clamp(0.95rem, 1.5vw, 1.1rem);
  color: var(--gray-mid);
  line-height: 2;
  font-family: var(--sans);
  max-width: 560px;
  margin-bottom: 48px;
  font-style: italic;
}

.about-page__divider {
  width: 40px;
  height: 2px;
  background: var(--klein);
  margin: 0 auto 40px;
}

.about-page__contact {
  font-size: 12px;
  color: var(--ink-soft);
  line-height: 2;
  font-family: var(--serif);
}

.about-page__contact strong {
  font-size: 10px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--klein);
  font-family: var(--serif-display);
  font-weight: 700;
  display: block;
  margin-bottom: 8px;
}

.about-page__contact a {
  color: var(--ink);
  border-bottom: 1px solid var(--gray-rule);
}
.about-page__contact a:hover { border-bottom-color: var(--klein); color: var(--klein); }

/* ══════════════════════════════════════════
   CAO LISTING PAGE
   ══════════════════════════════════════════ */
.cao-listing {
  margin-bottom: clamp(40px, 5vw, 64px);
}

.cao-listing__item {
  display: block;
  text-decoration: none;
  color: inherit;
  padding: clamp(20px, 3vw, 28px) 0;
  border-bottom: 1px solid var(--gray-rule);
  transition: padding-left 0.25s ease, border-color 0.25s ease;
  position: relative;
}
.cao-listing__item:hover {
  padding-left: 12px;
  border-bottom-color: var(--klein);
}
.cao-listing__item:hover .cao-listing__title {
  color: var(--klein);
}
.cao-listing__item:hover .cao-listing__excerpt {
  color: var(--ink-soft);
}

.cao-listing__meta {
  font-size: 10px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--gray-light);
  font-family: var(--serif-display);
  font-weight: 600;
  margin-bottom: 8px;
}

.cao-listing__title {
  font-size: 1.2rem;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 8px;
  letter-spacing: -0.2px;
  transition: color 0.2s;
}

.cao-listing__excerpt {
  font-size: 0.9rem;
  color: var(--gray-mid);
  line-height: 1.6;
  font-style: italic;
  font-family: var(--sans);
}

/* ══════════════════════════════════════════
   ABOUT PAGE — bio list + reward QR
   ══════════════════════════════════════════ */
.about-page__bio-list {
  list-style: none;
  padding: 0;
  margin: 0 0 48px 0;
  font-size: clamp(0.95rem, 1.5vw, 1.1rem);
  color: var(--gray-mid);
  line-height: 2.2;
  font-family: var(--sans);
  font-style: italic;
  text-align: center;
  max-width: 480px;
}

.about-page__bio-list li {
  margin: 0;
  padding: 0;
}

.about-page__reward {
  margin-top: 8px;
  text-align: center;
}

.about-page__reward-label {
  font-size: 9px;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--klein);
  font-family: var(--serif-display);
  font-weight: 700;
  margin-bottom: 16px;
}

.about-page__reward-img {
  width: 180px;
  height: 180px;
  object-fit: contain;
  border: 1px solid var(--gray-rule);
  display: block;
  margin: 0 auto 12px;
}

.about-page__reward-text {
  font-size: 0.85rem;
  color: var(--gray-light);
  font-style: italic;
  font-family: var(--sans);
}

/* ══════════════════════════════════════════
   ARTICLE SOURCES / REFERENCES (二创声明)
   ══════════════════════════════════════════ */
.article-sources {
  margin-top: clamp(48px, 6vw, 72px);
  padding-top: clamp(24px, 3vw, 32px);
  border-top: 1px solid var(--gray-rule);
}

.article-sources__label {
  font-size: 9px;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--gray-light);
  font-family: var(--serif-display);
  font-weight: 700;
  margin-bottom: 16px;
}

.article-sources__list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.article-sources__list li {
  font-size: 0.85rem;
  color: var(--gray-mid);
  line-height: 1.7;
  font-family: var(--sans);
  padding: 6px 0;
  border-bottom: 1px solid var(--gray-rule);
}

.article-sources__list li:last-child { border-bottom: none; }

.article-sources__list a {
  color: var(--ink-soft);
  border-bottom: 1px solid var(--gray-rule);
  word-break: break-all;
}
.article-sources__list a:hover { color: var(--klein); border-bottom-color: var(--klein); }

.article-sources__note {
  font-size: 0.8rem;
  color: var(--gray-light);
  font-style: italic;
  font-family: var(--sans);
  margin-top: 16px;
  line-height: 1.6;
}

/* ══════════════════════════════════════════
   RESPONSIVE — MOBILE (<=700px)
   ══════════════════════════════════════════ */
@media (max-width: 700px) {
  /* ── Shared mobile nav layout: logo stacked top, 4 links evenly distributed below ── */
  .home__nav,
  .inner-nav__inner,
  .nav {
    padding: 16px 20px 14px;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    grid-template-rows: auto auto;
    gap: 14px 0;
    align-items: center;
  }
  /* Brand: centered on row 1, Daily Briefing stacked below */
  .home__nav-brand,
  .inner-nav__brand,
  .nav__brand {
    grid-column: 1 / -1;
    grid-row: 1;
    text-align: center;
    font-size: 1.1rem;
    letter-spacing: 3px;
    justify-self: center;
  }
  .home__nav-brand small,
  .inner-nav__brand small,
  .nav__brand small {
    display: block;
    font-size: 0.42em;
    letter-spacing: 5px;
    margin-top: 4px;
    margin-left: 0;
    font-weight: 400;
  }
  /* Flatten link groups so individual links become grid items */
  .home__nav-group,
  .inner-nav__group,
  .nav__group {
    display: contents;
  }
  /* Each link occupies one column, centered */
  .home__nav-link,
  .inner-nav__link,
  .nav__link {
    grid-row: 2;
    text-align: center;
    font-size: 11px;
    letter-spacing: 2px;
    justify-self: center;
  }
  /* Position each of the 4 links across the 4 columns */
  .home__nav-group:first-child .home__nav-link:nth-child(1),
  .inner-nav__group:first-child .inner-nav__link:nth-child(1),
  .nav__group:first-child .nav__link:nth-child(1) { grid-column: 1; }
  .home__nav-group:first-child .home__nav-link:nth-child(2),
  .inner-nav__group:first-child .inner-nav__link:nth-child(2),
  .nav__group:first-child .nav__link:nth-child(2) { grid-column: 2; }
  .home__nav-group:last-child .home__nav-link:nth-child(1),
  .inner-nav__group:last-child .inner-nav__link:nth-child(1),
  .nav__group:last-child .nav__link:nth-child(1) { grid-column: 3; }
  .home__nav-group:last-child .home__nav-link:nth-child(2),
  .inner-nav__group:last-child .inner-nav__link:nth-child(2),
  .nav__group:last-child .nav__link:nth-child(2) { grid-column: 4; }

  /* ── Home hero ── */
  .home__hero { padding: 24px; }
  .home__teaser { margin-bottom: 32px; }
  .home__footer { flex-direction: column; gap: 8px; text-align: center; padding: 16px 24px; }

  /* ── Issue filter — 四级联动移动端 ── */
  .issue-filter {
    padding: 12px 0 8px;
    margin-bottom: 12px;
    gap: 8px;
    flex-wrap: nowrap;
  }
  .issue-filter__current {
    font-size: 0.95rem;
    flex-shrink: 0;
  }
  .issue-filter__row {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 6px;
    flex: 1;
    min-width: 0;
  }
  .issue-filter__select {
    width: 100%;
    min-width: 0;
    padding: 8px 22px 8px 4px;
    font-size: 11px;
    letter-spacing: 0;
    border: 1px solid var(--gray-rule);
    background: var(--paper);
    color: var(--ink);
    font-weight: 600;
    border-radius: 0;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='7' height='4' viewBox='0 0 7 4'%3E%3Cpath d='M1 1l2.5 2.5L6 1' stroke='%23002FA7' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 5px center;
    background-size: 7px 4px;
    -webkit-appearance: none;
    appearance: none;
    text-align: center;
    text-align-last: center;
  }

  /* ── Pagination mobile ── */
  .pagination {
    gap: 8px;
    padding: 24px 0 16px;
    flex-wrap: wrap;
  }
  .pagination__nav {
    font-size: 10px;
    padding: 6px 10px;
    letter-spacing: 1px;
  }
  .pagination__pages { gap: 2px; }
  .pagination__num {
    min-width: 30px;
    height: 30px;
    font-size: 11px;
  }
  .pagination__ellipsis { font-size: 11px; }

  /* ── Section header mobile ── */
  .section-header {
    padding: 14px 20px;
    font-size: 11px;
    letter-spacing: 4px;
  }
  .section-label {
    padding: 14px 20px;
    font-size: 11px;
    letter-spacing: 4px;
  }

  /* ── Cover story mobile ── */
  .card__title--cover {
    font-size: clamp(1.4rem, 6vw, 2rem);
    letter-spacing: -0.5px;
  }

  /* ── Grid mobile ── */
  .grid-articles { grid-template-columns: 1fr; }
  .article-grid { grid-template-columns: 1fr; }

  /* ── Footer mobile ── */
  .footer__inner {
    flex-direction: column;
    gap: 8px;
    text-align: center;
    padding: 16px 24px;
  }
  .site-footer .container {
    flex-direction: column;
    gap: 8px;
    text-align: center;
    padding: 16px 24px;
  }

  /* ── Container padding ── */
  .container { padding: 0 20px; }
  .container--narrow { padding: 0 20px; }
  .article-interactions { flex-direction: column; gap: 12px; align-items: flex-start; }
}

@media (max-width: 480px) {
  html { font-size: 15px; }
  .home__title { font-size: 2.4rem; }
  .about-page__name { font-size: 2rem; }
  .masthead__title { font-size: 2.4rem; }
}

/* ══════════════════════════════════════════
   ARTICLE INTERACTION BAR (views / likes / tip)
   ══════════════════════════════════════════ */
.article-interactions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin: clamp(32px, 5vw, 48px) 0 clamp(24px, 3vw, 32px);
  padding: clamp(16px, 2.5vw, 24px) 0;
  border-top: 1px solid var(--gray-rule);
  border-bottom: 1px solid var(--gray-rule);
  flex-wrap: wrap;
}

.article-interactions__stats {
  display: flex;
  align-items: center;
  gap: 24px;
  font-size: 13px;
  color: var(--gray-mid);
  font-family: var(--serif-display);
  letter-spacing: 0.5px;
}

.article-interactions__stat {
  display: flex;
  align-items: center;
  gap: 6px;
}

.article-interactions__stat-icon {
  font-size: 16px;
  line-height: 1;
  opacity: 0.6;
}

.article-interactions__stat-value {
  font-weight: 600;
  color: var(--ink-soft);
  font-variant-numeric: tabular-nums;
}

.article-interactions__stat-label {
  font-size: 11px;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--gray-light);
  font-family: var(--sans);
  font-style: italic;
}

.article-interactions__actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.like-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  background: var(--paper);
  border: 1px solid var(--gray-rule);
  border-radius: 0;
  font-family: var(--serif-display);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--ink-soft);
  cursor: pointer;
  transition: all 0.2s ease;
  user-select: none;
}

.like-btn:hover {
  background: var(--klein);
  color: var(--white);
  border-color: var(--klein);
  transform: translateY(-1px);
}

.like-btn:active {
  transform: translateY(0) scale(0.97);
}

.like-btn--liked {
  background: var(--klein);
  color: var(--white);
  border-color: var(--klein);
}

.like-btn__heart {
  font-size: 14px;
  transition: transform 0.2s ease;
}

.like-btn:hover .like-btn__heart,
.like-btn--liked .like-btn__heart {
  transform: scale(1.15);
}

.like-btn__count {
  font-variant-numeric: tabular-nums;
}

/* Like burst animation */
@keyframes likeBurst {
  0% { transform: scale(1); }
  30% { transform: scale(1.35); }
  60% { transform: scale(0.9); }
  100% { transform: scale(1); }
}

.like-btn--burst .like-btn__heart {
  animation: likeBurst 0.4s ease;
}

.tip-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  background: var(--ink);
  border: 1px solid var(--ink);
  border-radius: 0;
  font-family: var(--serif-display);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--white);
  cursor: pointer;
  transition: all 0.2s ease;
  user-select: none;
}

.tip-btn:hover {
  background: var(--klein);
  border-color: var(--klein);
  transform: translateY(-1px);
}

.tip-btn:active {
  transform: translateY(0) scale(0.97);
}

/* ══════════════════════════════════════════
   TIP MODAL
   ══════════════════════════════════════════ */
.tip-modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10000;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
  padding: 24px;
}

.tip-modal-overlay--open {
  opacity: 1;
  visibility: visible;
}

.tip-modal {
  background: var(--paper);
  padding: clamp(28px, 4vw, 40px);
  max-width: 380px;
  width: 100%;
  text-align: center;
  position: relative;
  transform: translateY(20px) scale(0.96);
  transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.tip-modal-overlay--open .tip-modal {
  transform: translateY(0) scale(1);
}

.tip-modal__close {
  position: absolute;
  top: 12px;
  right: 12px;
  width: 32px;
  height: 32px;
  background: none;
  border: none;
  font-size: 20px;
  color: var(--gray-light);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color 0.2s;
  line-height: 1;
  padding: 0;
}

.tip-modal__close:hover {
  color: var(--ink);
}

.tip-modal__label {
  font-size: 9px;
  letter-spacing: 4px;
  text-transform: uppercase;
  color: var(--klein);
  font-family: var(--serif-display);
  font-weight: 700;
  margin-bottom: 12px;
}

.tip-modal__title {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 8px;
  letter-spacing: -0.3px;
}

.tip-modal__desc {
  font-size: 0.85rem;
  color: var(--gray-mid);
  font-style: italic;
  font-family: var(--sans);
  margin-bottom: 20px;
  line-height: 1.5;
}

.tip-modal__qr {
  width: 200px;
  height: 200px;
  object-fit: contain;
  margin: 0 auto 16px;
  display: block;
}

.tip-modal__text {
  font-size: 0.85rem;
  color: var(--gray-mid);
  font-family: var(--sans);
  line-height: 1.5;
}

.tip-modal__text strong {
  color: var(--ink);
}

/* ══════════════════════════════════════════
   RESPONSIVE ADDITIONS
   ══════════════════════════════════════════ */
@media (max-width: 700px) {
  .article-interactions {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
  }
  .article-interactions__actions {
    width: 100%;
  }
  .like-btn, .tip-btn {
    flex: 1;
    justify-content: center;
  }
}

/* ══════════════════════════════════════════
   DESIGN SYSTEM v3 · STANDARD COMPONENTS
   Naming: page-element[-modifier]
   ══════════════════════════════════════════
   These are the canonical component classes.
   Use these for all new pages; legacy classes
   are kept for backward compatibility.
   ══════════════════════════════════════════ */

/* ── NAV: Navigation ──
   Usage: <nav class="nav nav--inner">
          <div class="nav__group">...</div>
          <a class="nav__brand">...</a>
          <div class="nav__group">...</div>
        </nav>
   Note: .nav is full-width (for backgrounds). Content is auto-centered
   with max-width + padding on the nav element itself. */
.nav {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  padding: var(--space-5) var(--padding-x);
  width: 100%;
}
.nav--home {
  background: var(--color-brand);
  color: var(--color-text-inverse);
  max-width: var(--max-width-wide);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
}
.nav--inner {
  background: var(--color-bg);
  border-bottom: none;
  max-width: 100%;
}
/* Inner wrapper for centered content on full-width navs */
.nav__inner {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  max-width: var(--max-width-wide);
  margin: 0 auto;
  width: 100%;
}
.nav__group {
  display: flex;
  gap: clamp(var(--space-6), 4vw, var(--space-12));
  align-items: center;
}
.nav__group:first-child { justify-content: flex-start; }
.nav__group:last-child { justify-content: flex-end; }
.nav__brand {
  font-size: clamp(1.1rem, 2.5vw, 1.4rem);
  font-weight: var(--weight-black);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  text-align: center;
  line-height: 1;
  text-decoration: none;
  border-bottom: none;
}
.nav--home .nav__brand { color: var(--color-text-inverse); }
.nav--inner .nav__brand { color: var(--color-text); }
.nav__brand small {
  display: block;
  font-size: 0.45em;
  letter-spacing: var(--tracking-widest);
  font-weight: var(--weight-regular);
  opacity: 0.7;
  margin-top: 2px;
}
.nav__link {
  font-size: var(--text-tag);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  font-family: var(--font-display);
  font-weight: var(--weight-medium);
  text-decoration: none;
  border-bottom: none;
  transition: color var(--duration-base) ease;
}
.nav--home .nav__link { color: rgba(255,255,255,0.75); }
.nav--home .nav__link:hover { color: var(--color-text-inverse); border-bottom: none; }
.nav--inner .nav__link { color: var(--color-text-faint); }
.nav--inner .nav__link:hover { color: var(--color-brand); border-bottom: none; }
.nav__link--active { font-weight: var(--weight-bold); }
.nav--home .nav__link--active { color: var(--color-text-inverse); }
.nav--inner .nav__link--active { color: var(--color-brand); }

/* ── TAG: Article category tag ── */
.tag {
  display: inline-block;
  font-size: var(--text-tag);
  letter-spacing: 0;
  color: var(--color-brand);
  font-family: var(--font-serif);
  font-weight: var(--weight-regular);
  margin-bottom: var(--space-3);
  background: var(--color-brand-soft);
  padding: var(--space-1) var(--space-3);
  border-radius: 0;
  text-transform: none;
}

/* ── CARD: Article card (grid) ──
   Usage: <a class="card card--article">
            <span class="card__tag">...</span>
            <h3 class="card__title">...</h3>
            <p class="card__excerpt">...</p>
          </a> */
.card {
  display: block;
  text-decoration: none;
  color: inherit;
  padding: 0 0 var(--space-5) 0;
  border-bottom: 1px solid var(--color-border);
  transition: transform var(--duration-base) var(--ease-out), border-color var(--duration-base) ease;
  position: relative;
}
.card:hover {
  transform: translateY(-3px);
  border-bottom-color: var(--color-brand);
}
.card:hover .card__title { color: var(--color-brand-deep); }
.card:hover .card__excerpt { color: var(--color-text-soft); }
.card::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-brand);
  transition: width var(--duration-slow) var(--ease-out);
}
.card:hover::after { width: 100%; }
.card__tag {
  display: inline-block;
  font-size: var(--text-tag);
  color: var(--color-brand);
  font-family: var(--font-serif);
  font-weight: var(--weight-regular);
  margin-bottom: var(--space-3);
  background: var(--color-brand-soft);
  padding: var(--space-1) var(--space-3);
}
.card__title {
  font-size: var(--text-card);
  font-weight: var(--weight-bold);
  line-height: var(--leading-snug);
  margin-bottom: var(--space-2);
  letter-spacing: var(--tracking-tight);
  color: var(--color-brand);
  transition: color var(--duration-base) ease;
}
.card__excerpt {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: var(--leading-relaxed);
  font-family: var(--font-sans);
}

/* ── CARD-COVER: Cover story link ──
   Usage: <a class="card card--cover">
            <h3 class="card__title card__title--cover">...</h3>
            <p class="card__deck">...</p>
            <span class="card__byline">...</span>
          </a> */
.card--cover {
  border-bottom: none;
  padding: var(--space-1) 0;
  transition: transform var(--duration-base) var(--ease-out);
}
.card--cover:hover {
  transform: translateX(6px);
  border-bottom: none;
}
.card__title--cover {
  font-size: var(--text-2xl);
  font-weight: var(--weight-black);
  letter-spacing: var(--tracking-tighter);
  line-height: 1.1;
  margin-bottom: var(--space-4);
  max-width: 860px;
  color: var(--color-brand);
}
.card__deck {
  font-size: var(--text-deck);
  color: var(--color-text-muted);
  line-height: var(--leading-relaxed);
  font-style: italic;
  font-family: var(--font-sans);
  max-width: 640px;
  margin-bottom: var(--space-4);
  transition: color var(--duration-base) ease;
}
.card--cover:hover .card__deck { color: var(--color-text-soft); }
.card__byline {
  font-size: var(--text-sm);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--color-text-faint);
  font-family: var(--font-display);
  font-weight: var(--weight-medium);
}

/* ── SECTION-HEADER: Section label bar ── */
.section-header {
  display: block;
  width: 100%;
  font-size: var(--text-xs);
  font-weight: var(--weight-bold);
  letter-spacing: var(--tracking-max);
  text-transform: uppercase;
  color: var(--color-text-inverse);
  background: var(--color-brand);
  padding: var(--space-4) var(--space-6);
  margin-bottom: var(--space-8);
  margin-top: var(--space-2);
  font-family: var(--font-display);
}
.section-header span {
  font-weight: var(--weight-regular);
  color: rgba(255,255,255,0.6);
  font-style: italic;
  font-family: var(--font-sans);
  margin-left: var(--space-4);
  font-size: 0.85em;
  letter-spacing: var(--tracking-wide);
}

/* ── FOOTER ── */
.footer {
  background: var(--color-brand);
  color: var(--color-text-inverse);
  padding: var(--space-7) 0 var(--space-6);
  margin-top: 0;
  flex-shrink: 0;
}
.footer__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--padding-x);
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.footer__brand {
  font-size: clamp(1.2rem, 2vw, 1.4rem);
  font-weight: var(--weight-black);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
}
.footer__meta {
  font-size: var(--text-sm);
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: rgba(255,255,255,0.6);
  font-family: var(--font-display);
  font-weight: var(--weight-medium);
}

/* ── ISSUE-SELECTOR ── */
.issue-select {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-5) 0 var(--space-4);
  margin-bottom: var(--gap-2xl);
  flex-wrap: wrap;
  border-bottom: 1px solid var(--color-border-light);
}
.issue-select__current {
  font-size: var(--text-lg);
  font-weight: var(--weight-bold);
  letter-spacing: var(--tracking-tight);
  color: var(--color-text);
}
.issue-select select {
  appearance: none;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  padding: var(--space-2) var(--space-8) var(--space-2) var(--space-4);
  font-family: var(--font-display);
  font-size: var(--text-tag);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--color-text);
  cursor: pointer;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%236b6b6b' stroke-width='1.5' fill='none'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  border-radius: 0;
  transition: border-color var(--duration-base) ease, background var(--duration-base) ease;
}
.issue-select select:hover {
  border-color: var(--color-brand);
}
.issue-select select:focus {
  outline: none;
  border-color: var(--color-brand);
  background-color: var(--color-brand-soft);
}

/* ── HERO: Article detail page hero ── */
.hero {
  background: var(--color-brand);
  color: var(--color-text-inverse);
  margin: 0 calc(-50vw + 50%) var(--gap-2xl);
  padding: var(--gap-3xl) var(--padding-x);
  position: relative;
  overflow: hidden;
}
.hero__inner {
  max-width: var(--max-width-text);
  margin: 0 auto;
}
.hero__label {
  font-size: var(--text-sm);
  letter-spacing: var(--tracking-max);
  text-transform: uppercase;
  color: rgba(255,255,255,0.5);
  font-family: var(--font-display);
  font-weight: var(--weight-bold);
  margin-bottom: var(--space-6);
}
.hero__title {
  font-size: var(--text-hero);
  font-weight: var(--weight-black);
  letter-spacing: var(--tracking-tightest);
  line-height: var(--leading-tight);
  text-transform: uppercase;
  margin-bottom: var(--space-5);
}
.hero__deck {
  font-size: clamp(1rem, 1.8vw, 1.2rem);
  color: rgba(255,255,255,0.65);
  font-style: italic;
  font-family: var(--font-sans);
  line-height: var(--leading-normal);
}
.hero__back {
  font-size: var(--text-sm);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: rgba(255,255,255,0.5);
  font-family: var(--font-display);
  font-weight: var(--weight-medium);
  margin-bottom: var(--space-8);
  display: inline-block;
  text-decoration: none;
  border-bottom: none;
}
.hero__back:hover { color: var(--color-text-inverse); border-bottom: none; }

/* ── CAO-HEADER: CAO listing page header ── */
.cao-header {
  background: var(--color-brand);
  color: var(--color-text-inverse);
  padding: var(--gap-xl) 0 var(--gap-lg);
  margin: 0 calc(-50vw + 50%);
  padding-left: var(--padding-x);
  padding-right: var(--padding-x);
}
.cao-header__inner {
  max-width: var(--max-width-wide);
  margin: 0 auto;
}
.cao-header__eyebrow {
  font-size: var(--text-xs);
  letter-spacing: var(--tracking-max);
  text-transform: uppercase;
  color: rgba(255,255,255,0.5);
  font-family: var(--font-display);
  font-weight: var(--weight-bold);
  margin-bottom: var(--space-4);
}
.cao-header__title {
  font-size: clamp(2.2rem, 5vw, 3.5rem);
  font-weight: var(--weight-black);
  color: var(--color-text-inverse);
  letter-spacing: -1px;
  line-height: 1.1;
  margin-bottom: var(--space-3);
}
.cao-header__desc {
  font-size: 0.95rem;
  color: rgba(255,255,255,0.5);
  font-style: italic;
  font-family: var(--font-serif);
  max-width: 480px;
  margin: 0;
}

/* ── CAO-CARD: CAO card on blue background ── */
.card--cao {
  display: block;
  text-decoration: none;
  color: var(--color-text-inverse);
  padding: var(--gap-lg);
  border: 1px solid rgba(255,255,255,0.25);
  background: rgba(255,255,255,0.05);
  transition: background var(--duration-base) ease, border-color var(--duration-base) ease, transform var(--duration-base) var(--ease-out);
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid rgba(255,255,255,0.25);
}
.card--cao:hover {
  background: rgba(255,255,255,0.12);
  border-color: rgba(255,255,255,0.6);
  transform: translateY(-3px);
  box-shadow: var(--shadow-cao);
}
.card--cao .card__title { color: var(--color-text-inverse); }
.card--cao:hover .card__title { color: var(--color-text-inverse); }
.card--cao:hover .card__excerpt { color: rgba(255,255,255,0.8); }

/* ── CAO-FEATURED: Featured CAO article on listing page ── */
.cao-featured {
  display: block;
  text-decoration: none;
  color: inherit;
  border-bottom: none;
  transition: transform var(--duration-base) var(--ease-out);
  padding: var(--space-1) 0;
}
.cao-featured:hover {
  transform: translateX(6px);
  border-bottom: none;
}
.cao-featured h3 { transition: color var(--duration-base) ease; }
.cao-featured:hover h3 { color: var(--color-text-inverse) !important; }
.cao-featured:hover p { color: rgba(255,255,255,0.7) !important; }
.cao-more {
  font-size: var(--text-xs);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: rgba(255,255,255,0.4);
  font-family: var(--font-display);
  font-weight: var(--weight-bold);
  text-decoration: none;
  border-bottom: 1px solid rgba(255,255,255,0.2);
  padding-bottom: var(--space-1);
  transition: color var(--duration-base), border-color var(--duration-base);
}
.cao-more:hover {
  color: rgba(255,255,255,0.85);
  border-bottom-color: rgba(255,255,255,0.7);
}

/* ── CAO-LISTING: CAO listing items ── */
.cao-list__item {
  display: block;
  text-decoration: none;
  color: inherit;
  padding: var(--gap-md) 0;
  border-bottom: 1px solid var(--color-border);
  transition: padding-left var(--duration-base) ease, border-color var(--duration-base) ease;
  position: relative;
}
.cao-list__item:hover {
  padding-left: var(--space-3);
  border-bottom-color: var(--color-brand);
}
.cao-list__item:hover .cao-list__title { color: var(--color-brand); }
.cao-list__item:hover .cao-list__excerpt { color: var(--color-text-soft); }
.cao-list__meta {
  font-size: var(--text-xs);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--color-text-faint);
  font-family: var(--font-display);
  font-weight: var(--weight-bold);
  margin-bottom: var(--space-2);
}
.cao-list__title {
  font-size: var(--text-xl);
  font-weight: var(--weight-bold);
  line-height: var(--leading-snug);
  color: var(--color-text);
  margin-bottom: var(--space-2);
  letter-spacing: var(--tracking-tight);
  transition: color var(--duration-base) ease;
}
.cao-list__excerpt {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: var(--leading-relaxed);
  font-family: var(--font-sans);
  font-style: italic;
  transition: color var(--duration-base) ease;
}

/* ── GRID: Article grid layout ── */
.grid-articles {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 300px), 1fr));
  gap: var(--gap-md);
}

/* ── SECTION: Content section spacing ── */
.section {
  margin-bottom: var(--gap-2xl);
}

/* ══════════════════════════════════════════
   SELECTION
   ══════════════════════════════════════════ */
::selection { background: var(--color-brand); color: var(--color-text-inverse); }