/* ============================================================
   跨境大白说 · 设计系统（v3）
   深蓝主色 + 中性灰 + 红色仅作紧急强调；8px 网格、1200 容器
   ============================================================ */

:root {
  /* 品牌蓝 */
  --blue-900: #172554;
  --blue-800: #1E40AF;   /* 主色深：按下态 / 重要标题 */
  --blue-700: #1D4ED8;   /* 主色：链接 / 按钮 / 当前导航 / Hover */
  --blue-600: #2563EB;
  --blue-100: #DBEAFE;
  --blue-50:  #EFF6FF;   /* 主色浅底：标签背景 */

  --red-600: #DC2626;    /* 强调色：仅真紧急（如 ★重要） */
  --red-50:  #FEF2F2;    /* 强调浅底 */

  /* 中性色 */
  --ink-900: #111827;    /* 正文 */
  --ink-700: #374151;
  --ink-600: #6B7280;    /* 辅助文字 / 日期 */
  --ink-400: #9CA3AF;
  --ink-200: #D1D5DB;
  --line:      #D1D5DB;  /* 边框 / 分割线 */
  --line-soft: #E5E7EB;

  /* 语义 */
  --bg:             #F9FAFB;  /* 纸白 */
  --bg-soft:        #F3F4F6;
  --text:           #111827;
  --text-secondary: #6B7280;
  --text-muted:     #9CA3AF;
  --accent:         #1D4ED8;
  --accent-deep:    #1E40AF;
  --accent-soft:    #EFF6FF;
  --warm:           #DC2626;  /* 红色，仅 ★重要 使用 */
  --warm-soft:      #FEF2F2;
  --cool:           #1D4ED8;
  --cool-soft:      #EFF6FF;

  /* 形状 */
  --radius:    8px;   /* 卡片 */
  --radius-sm: 6px;   /* 按钮 */
  --radius-lg: 12px;

  /* 阴影 */
  --shadow-sm: 0 1px 2px rgba(17, 24, 39, 0.04), 0 2px 8px rgba(17, 24, 39, 0.05);
  --shadow-md: 0 4px 12px rgba(17, 24, 39, 0.08);   /* 卡片 Hover */
  --shadow-lg: 0 12px 32px rgba(17, 24, 39, 0.10);

  /* 版式 */
  --font: -apple-system, BlinkMacSystemFont, "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;

  /* 8px 网格 */
  --space-1: 8px; --space-2: 16px; --space-3: 24px;
  --space-4: 32px; --space-6: 48px; --space-8: 64px; --space-12: 96px;

  /* 字号阶梯 */
  --fs-display: clamp(2.5rem, 5vw, 3rem); /* 40–48 */
  --fs-h1: 2rem;      /* 32 */
  --fs-h2: 1.5rem;    /* 24 */
  --fs-h3: 1.25rem;   /* 20 */
  --fs-body: 17px;    /* 正文，行高 1.75 */
  --fs-sm: 14px;
  --fs-xs: 12px;

  /* 布局 */
  --container: 1280px;
  --space: 24px;
}

/* 暗色模式：手动切换（data-theme="dark"）+ 系统跟随（未手动指定时），两处变量保持一致 */
:root[data-theme="dark"] {
  --bg: #0B1220;
  --bg-soft: #111827;
  --text: #E5E7EB;
  --text-secondary: #9CA3AF;
  --text-muted: #6B7280;
  --line: #1F2937;
  --line-soft: #16213A;
  --accent-soft: rgba(29, 78, 216, 0.20);
  --warm-soft: rgba(220, 38, 38, 0.16);
  --cool-soft: rgba(29, 78, 216, 0.22);
  --blue-100: #1E3A5F;
  --ink-200: #26334A;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.5);
  --card-bg: #111827;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --bg: #0B1220;
    --bg-soft: #111827;
    --text: #E5E7EB;
    --text-secondary: #9CA3AF;
    --text-muted: #6B7280;
    --line: #1F2937;
    --line-soft: #16213A;
    --accent-soft: rgba(29, 78, 216, 0.20);
    --warm-soft: rgba(220, 38, 38, 0.16);
    --cool-soft: rgba(29, 78, 216, 0.22);
    --blue-100: #1E3A5F;
    --ink-200: #26334A;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.35);
    --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.5);
    --card-bg: #111827;
  }
}
:root {
  --card-bg: #ffffff;
}

/* ---------- Reset / Base ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}
html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}
body {
  margin: 0;
  font-family: var(--font);
  font-size: var(--fs-body, 17px);
  line-height: 1.75;
  color: var(--text);
  font-variant-numeric: tabular-nums;
  background-color: var(--bg);
  background-image: radial-gradient(circle, rgba(17, 24, 39, 0.05) 1px, transparent 1.6px);
  background-size: 9px 9px;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img {
  max-width: 100%;
  height: auto;
  display: block;
}
a {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.15s ease;
}
a:hover {
  color: var(--accent-deep);
}
h1, h2, h3, h4 {
  margin: 0 0 0.5em;
  line-height: 1.3;
  font-weight: 750;
  letter-spacing: -0.01em;
  color: var(--text);
}
p {
  margin: 0 0 1em;
}
ul, ol {
  margin: 0 0 1em;
  padding-left: 1.4em;
}
::selection {
  background: var(--accent-soft);
}

/* ---------- Layout helpers ---------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--space);
}
.section {
  padding: 64px 0;
}
.section-tight {
  padding: 40px 0;
}

/* ---------- Eyebrow / Section head ---------- */
.eyebrow {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 10px;
}
.section-head {
  margin-bottom: 28px;
}
.section-head h2 {
  font-size: 1.7rem;
  margin: 0;
}
.section-head p {
  color: var(--text-secondary);
  margin: 8px 0 0;
  max-width: 640px;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 22px;
  border-radius: 999px;
  font-size: 0.95rem;
  font-weight: 650;
  line-height: 1.4;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.18s ease;
  white-space: nowrap;
}
.btn-primary {
  background: var(--accent);
  color: #fff;
  box-shadow: var(--shadow-sm);
}
.btn-primary:hover {
  background: var(--accent-deep);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}
.btn-ghost {
  background: transparent;
  color: var(--text);
  border-color: var(--line);
}
.btn-ghost:hover {
  border-color: var(--ink-200);
  background: var(--bg-soft);
  color: var(--text);
}
.btn-warm {
  background: var(--warm);
  color: #fff;
}
.btn-warm:hover {
  background: #e96a0a;
  color: #fff;
  transform: translateY(-1px);
}
.btn-sm {
  padding: 7px 15px;
  font-size: 0.85rem;
}

/* ---------- Badge / Tag ---------- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 650;
  color: var(--accent);
  background: var(--accent-soft);
  line-height: 1.6;
}
.badge-warm {
  color: var(--warm);
  background: var(--warm-soft);
}
.badge-cool {
  color: var(--cool);
  background: var(--cool-soft);
}
.badge-neutral {
  color: var(--text-secondary);
  background: var(--bg-soft);
  border: 1px solid var(--line);
}
.tag {
  display: inline-block;
  padding: 3px 11px;
  border-radius: 999px;
  font-size: 0.78rem;
  color: var(--text-secondary);
  background: var(--bg-soft);
  border: 1px solid var(--line);
  margin: 0 6px 6px 0;
}

/* ---------- 首页内容地图 ---------- */
.map-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 16px;
}
.map-badge {
  padding: 9px 18px;
  font-size: 0.9rem;
  font-weight: 600;
  border: 1px solid transparent;
  transition: all 0.18s ease;
}
a.map-badge:hover {
  border-color: var(--ink-200);
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}
.map-badge.soon {
  color: var(--text-muted);
  background: var(--bg-soft);
  border: 1px dashed var(--line);
  cursor: default;
}

/* ---------- Cards ---------- */
.card {
  background: var(--card-bg);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px;
  box-shadow: var(--shadow-sm);
}
.card-grid {
  display: grid;
  gap: 20px;
}
.cols-2 { grid-template-columns: repeat(2, 1fr); }
.cols-3 { grid-template-columns: repeat(3, 1fr); }

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: saturate(160%) blur(14px);
  border-bottom: 1px solid var(--line);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  gap: 16px;
}
.site-logo {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  color: var(--text);
  font-weight: 750;
  font-size: 1.08rem;
  letter-spacing: -0.01em;
}
.site-logo:hover { color: var(--text); }
.logo-mark {
  width: 36px;
  height: 27px;
  border-radius: 8px;
  overflow: hidden;
  background: #fff;
  border: 1px solid var(--line);
  display: grid;
  place-items: center;
  flex-shrink: 0;
}
.logo-mark img { width: 100%; height: 100%; object-fit: cover; padding: 0; }
.logo-text-en {
  display: block;
  font-size: 0.62rem;
  font-weight: 650;
  letter-spacing: 0.22em;
  color: var(--text-muted);
  text-transform: uppercase;
  line-height: 1.2;
}
.main-nav {
  display: flex;
  align-items: center;
  gap: 4px;
}
.nav-link {
  display: inline-flex;
  align-items: center;
  padding: 8px 14px;
  border-radius: 999px;
  font-size: 0.95rem;
  font-weight: 560;
  color: var(--text-secondary);
}
.nav-link:hover { color: var(--text); background: var(--bg-soft); }
.nav-link.active {
  color: var(--accent);
  background: var(--accent-soft);
  font-weight: 650;
}
.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}
.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--line);
  border-radius: 10px;
  width: 42px;
  height: 42px;
  cursor: pointer;
  color: var(--text);
  font-size: 1.2rem;
}
.mobile-nav {
  display: none;
}
@media (max-width: 900px) {
  .header-inner { flex-wrap: wrap; height: auto; padding: 12px 0; row-gap: 10px; }
  .main-nav { display: none; }
  .nav-toggle { display: inline-flex; align-items: center; justify-content: center; }
  .mobile-nav.open { display: block; }
  .header-search { order: 3; flex: 1 1 100%; }
  .header-search-box { width: 100%; }
  .header-search-panel { left: 0; right: 0; width: auto; }
  .mobile-nav {
    border-top: 1px solid var(--line);
    background: var(--bg);
    padding: 10px 0 16px;
  }
  .mobile-nav .nav-link {
    display: block;
    border-radius: 12px;
    padding: 12px 16px;
    margin: 2px 0;
  }
}

/* ---------- Hero (首页) ---------- */
.hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: 96px 0 72px;
  background:
    linear-gradient(to bottom, var(--bg) 0%, transparent 14%),
    url("/art/hero-boat.jpg") 50% 42% / cover no-repeat,
    var(--bg);
  border-bottom: 1px solid var(--line);
}
/* 左侧淡色渐变蒙层：只盖文字区，船居中保持清晰 */
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  background: linear-gradient(90deg, var(--bg) 0%, var(--bg) 26%, color-mix(in srgb, var(--bg) 72%, transparent) 46%, transparent 62%);
  pointer-events: none;
}
:root[data-theme="dark"] .hero::before {
  background: linear-gradient(90deg, var(--bg) 0%, var(--bg) 28%, color-mix(in srgb, var(--bg) 80%, transparent) 50%, transparent 66%);
}
.hero .container {
  position: relative;
  z-index: 1;
}
.hero-grid {
  display: block;
  max-width: 760px;
}
.hero-copy {
  max-width: 760px;
  text-align: left;
}
.hero-title {
  font-size: clamp(2.1rem, 5vw, 3.1rem);
  line-height: 1.18;
  margin: 20px 0 18px;
  font-weight: 800;
  letter-spacing: -0.02em;
}
.hero-title .accent-text {
  background: linear-gradient(120deg, var(--accent), var(--blue-600));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero-sub {
  font-size: 1.12rem;
  color: var(--text-secondary);
  max-width: 620px;
  margin: 0 0 30px;
}
.hero-actions {
  display: flex;
  gap: 12px;
  justify-content: flex-start;
  flex-wrap: wrap;
}
.hero-art {
  justify-self: center;
}
/* Zine 海报：层次化装裱（蓝色衬板 + 做旧纸张 + 品牌贴标），去「AI 感」 */
.poster-mount {
  position: relative;
  transform: rotate(2deg);
}
.poster-mount::before {
  content: '';
  position: absolute;
  inset: 14px -14px -14px 14px;
  background: linear-gradient(150deg, var(--accent-soft), transparent 72%);
  border: 1px solid var(--line);
  border-radius: 8px;
  z-index: 0;
}
.zine-poster {
  margin: 0;
  position: relative;
  z-index: 1;
  width: 330px;
  padding: 12px 12px 42px;
  background: #fffdf8;
  border: 1px solid var(--line);
  border-radius: 4px;
  box-shadow: var(--shadow-lg);
}
.zine-poster img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 2px;
}
.zine-poster::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 4px;
  box-shadow: inset 0 0 26px rgba(120, 100, 60, 0.10);
  pointer-events: none;
}
.zine-poster figcaption {
  position: absolute;
  bottom: 10px;
  left: 0;
  right: 0;
  text-align: center;
  font-size: 0.68rem;
  letter-spacing: 0.24em;
  color: var(--text-muted);
  font-family: var(--font-mono);
}
.poster-tag {
  position: absolute;
  right: -8px;
  bottom: -14px;
  z-index: 2;
  padding: 5px 13px;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: #fff;
  background: var(--accent);
  border-radius: 999px;
  box-shadow: var(--shadow-md);
  transform: rotate(-3deg);
  white-space: nowrap;
}
.hero-stats {
  display: flex;
  justify-content: flex-start;
  gap: 0;
  margin-top: 56px;
  flex-wrap: wrap;
  width: fit-content;
  max-width: 100%;
  padding: 16px 24px;
  background: color-mix(in srgb, var(--bg) 78%, transparent);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--line);
  border-radius: 14px;
}
.stat {
  text-align: left;
  padding: 0 34px;
  border-left: 1px solid var(--line);
}
.stat:first-child { padding-left: 0; border-left: none; }
.stat .num {
  font-size: 1.9rem;
  font-weight: 800;
  color: var(--text);
  letter-spacing: -0.02em;
}
.stat .label {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 2px;
}

/* Hero 双栏响应式 */
@media (max-width: 1000px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .hero-copy {
    max-width: 640px;
    margin: 0 auto;
    text-align: center;
  }
  .hero-sub { margin: 0 auto 30px; }
  .hero-actions { justify-content: center; }
  .hero-stats { justify-content: center; }
  .hero-art { justify-self: center; }
  .zine-poster { width: 260px; }
  .poster-mount::before { inset: 12px -10px -10px 10px; }
}

/* ---------- Page hero (内页) ---------- */
.page-hero {
  padding: 56px 0 32px;
  text-align: center;
}
.page-hero h1 {
  font-size: clamp(1.9rem, 4vw, 2.5rem);
  margin: 14px 0 10px;
}
.page-hero .lead {
  color: var(--text-secondary);
  max-width: 680px;
  margin: 0 auto;
  font-size: 1.02rem;
}

/* ---------- Breadcrumb ---------- */
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  font-size: 0.84rem;
  color: var(--text-muted);
  margin-bottom: 20px;
}
.breadcrumb a { color: var(--text-muted); }
.breadcrumb a:hover { color: var(--accent); }
.breadcrumb .sep { color: var(--ink-200); }
.breadcrumb .cur { color: var(--text-secondary); }

/* ---------- Post card ---------- */
.post-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 22px;
  background: var(--card-bg);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: all 0.18s ease;
  color: inherit;
}
.post-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: var(--ink-200);
  color: inherit;
}
.post-card-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.8rem;
  color: var(--text-muted);
}
.post-card h3 {
  font-size: 1.12rem;
  margin: 0;
  line-height: 1.45;
}
.post-card p {
  color: var(--text-secondary);
  font-size: 0.93rem;
  margin: 0;
  line-height: 1.65;
}
.post-card-more {
  font-size: 0.85rem;
  font-weight: 650;
  color: var(--accent);
  margin-top: 4px;
}

/* ---------- Blog layout (主栏 + 侧栏) ---------- */
.blog-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 40px;
  padding: 40px 0 72px;
}
@media (max-width: 960px) {
  .blog-layout { grid-template-columns: 1fr; gap: 32px; }
}
.sidebar-card {
  background: var(--card-bg);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 18px;
}
.sidebar-title {
  font-size: 0.8rem;
  font-weight: 750;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin: 0 0 12px;
}
.sidebar-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.sidebar-list a {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
  padding: 8px 10px;
  border-radius: 9px;
  color: var(--text-secondary);
  font-size: 0.93rem;
}
.sidebar-list a:hover {
  background: var(--bg-soft);
  color: var(--text);
}
.sidebar-list .cnt { color: var(--text-muted); font-size: 0.82rem; }

/* ---------- Blog post ---------- */
.blog-post-header { margin-bottom: 8px; }
.blog-post-header h1 { font-size: clamp(1.7rem, 3.5vw, 2.3rem); margin-bottom: 14px; }
.blog-post-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  color: var(--text-muted);
  font-size: 0.86rem;
  margin-bottom: 26px;
}
.prose {
  color: var(--text);
  font-size: 1.03rem;
  line-height: 1.85;
}
.prose h2 {
  font-size: 1.4rem;
  margin: 2em 0 0.7em;
  padding-top: 0.2em;
}
.prose h3 {
  font-size: 1.16rem;
  margin: 1.6em 0 0.6em;
}
.prose p { margin: 0 0 1.2em; }
.prose ul, .prose ol { margin: 0 0 1.2em; }
.prose li { margin: 0.3em 0; }
.prose a { text-decoration: underline; text-underline-offset: 3px; }
.prose strong { font-weight: 750; }
.prose blockquote {
  margin: 1.4em 0;
  padding: 4px 0 4px 18px;
  border-left: 3px solid var(--accent);
  color: var(--text-secondary);
}
.prose table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.4em 0;
  font-size: 0.95rem;
  display: block;
  overflow-x: auto;
}
.prose th, .prose td {
  border: 1px solid var(--line);
  padding: 9px 13px;
  text-align: left;
  vertical-align: top;
}
.prose th { background: var(--bg-soft); font-weight: 700; }
.prose code {
  font-family: var(--font-mono);
  font-size: 0.88em;
  background: var(--bg-soft);
  border: 1px solid var(--line);
  padding: 2px 6px;
  border-radius: 6px;
}
.prose pre {
  background: #0e1726;
  color: #e6edf7;
  padding: 16px 18px;
  border-radius: 12px;
  overflow-x: auto;
  margin: 1.4em 0;
  font-size: 0.9rem;
  line-height: 1.6;
}
.prose pre code { background: none; border: none; padding: 0; color: inherit; }
.blog-post-footer {
  margin-top: 36px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.blog-post-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.blog-post-back {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 650;
  color: var(--accent);
}

/* ---------- Author card（文章详情页作者卡） ---------- */
.author-card {
  margin-top: 28px;
  padding: 20px 22px;
  background: var(--card-bg);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  display: flex;
  gap: 16px;
  align-items: flex-start;
}
.author-avatar {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  object-fit: cover;
  flex-shrink: 0;
  border: 1px solid var(--line);
  background: #fff;
}
.author-info { min-width: 0; }
.author-name { font-weight: 700; font-size: 1.02rem; color: var(--ink-900); }
.author-bio { margin: 6px 0 10px; color: var(--text-secondary); font-size: 0.92rem; line-height: 1.7; }
.author-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 14px;
  align-items: center;
  font-size: 0.9rem;
  color: var(--text-secondary);
}
.author-row a { color: var(--accent); font-weight: 650; }
.author-cta {
  margin: 10px 0 0;
  font-size: 0.85rem;
  color: var(--text-secondary);
  padding-top: 10px;
  border-top: 1px dashed var(--line);
}
@media (max-width: 560px) {
  .author-card { flex-direction: column; }
}

/* ---------- 分类页统一页尾（返回全部文章） ---------- */
.category-back {
  margin: 8px 0 56px;
  text-align: center;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}
.category-back a { color: var(--accent); font-weight: 650; }
.category-back a:hover { text-decoration: underline; }

/* ---------- News card ---------- */
.news-card {
  display: block;
  padding: 20px 22px;
  background: var(--card-bg);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: all 0.18s ease;
  color: inherit;
  margin-bottom: 14px;
}
.news-card:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
  border-color: var(--ink-200);
  color: inherit;
}
.news-card-top {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
  flex-wrap: wrap;
}
.news-card h3 { font-size: 1.08rem; margin: 0; line-height: 1.45; }
.news-card h3 a { color: inherit; text-decoration: none; }
.news-card h3 a:hover { color: var(--accent); }
.news-card p { color: var(--text-secondary); font-size: 0.93rem; margin: 8px 0 0; }
.news-card-action {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-weight: 600;
  font-size: 0.82rem;
  color: var(--accent);
  text-decoration: none;
  white-space: nowrap;
}
.news-card-action.ext { color: var(--text-muted); font-weight: 500; }
.news-card-action:hover { color: var(--accent-deep); }
.news-card-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 12px;
  font-size: 0.8rem;
  color: var(--text-muted);
  flex-wrap: wrap;
}
.news-pin {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 2px 10px;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--warm);
  background: var(--warm-soft);
}

/* ---------- Contact block ---------- */
.contact-block {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
  margin-top: 24px;
}
.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 20px;
  background: var(--card-bg);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}
.contact-icon {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  font-size: 1.15rem;
  flex-shrink: 0;
}
.contact-item h4 { margin: 0 0 4px; font-size: 1rem; }
.contact-item p { margin: 0; color: var(--text-secondary); font-size: 0.9rem; }
.contact-item .value { font-weight: 700; color: var(--text); }
.contact-item .contact-note {
  display: inline-block;
  margin-top: 8px;
  padding: 3px 10px;
  font-size: 0.8rem;
  color: var(--ink-700);
  background: var(--warm-soft);
  border-radius: 999px;
  line-height: 1.5;
}
.contact-qr {
  display: block;
  margin-top: 12px;
  width: 112px;
  height: 112px;
  border-radius: 10px;
  border: 1px solid var(--line);
  object-fit: cover;
  background: #fff;
}

/* ---------- Timeline (about) ---------- */
.timeline { position: relative; margin: 8px 0 0; padding-left: 26px; }
.timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 6px;
  bottom: 6px;
  width: 2px;
  background: var(--line);
}
.timeline-item { position: relative; padding: 0 0 26px; }
.timeline-item::before {
  content: "";
  position: absolute;
  left: -26px;
  top: 7px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--accent);
  border: 3px solid var(--bg);
  box-shadow: 0 0 0 2px var(--accent-soft);
}
.timeline-item:last-child { padding-bottom: 0; }
.timeline-item .period {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.04em;
}
.timeline-item h4 { margin: 4px 0 6px; font-size: 1.05rem; }
.timeline-item p { color: var(--text-secondary); font-size: 0.94rem; margin: 0; }

/* ---------- Outline ---------- */
.outline-chapter {
  background: var(--card-bg);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px 24px;
  margin-bottom: 16px;
}
.outline-chapter-head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 12px;
}
.outline-no {
  font-size: 0.82rem;
  font-weight: 800;
  color: var(--accent);
  letter-spacing: 0.06em;
}
.outline-chapter-head h3 { font-size: 1.18rem; margin: 0; }
.outline-chapter-head .en { color: var(--text-muted); font-size: 0.82rem; }
.outline-chapter > p.desc { color: var(--text-secondary); font-size: 0.94rem; margin: 0 0 14px; }
.outline-topics {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 320px), 1fr));
  gap: 10px 14px;
}
.outline-topic {
  display: block;
  padding: 12px 14px;
  border-radius: var(--radius);
  font-size: 0.9rem;
  color: var(--text-secondary);
  background: var(--bg-soft);
  border: 1px solid var(--line);
  transition: border-color 0.18s ease, box-shadow 0.18s ease;
}
.outline-topic:hover { border-color: var(--accent); box-shadow: var(--shadow-sm); }
.outline-topic.ready { background: var(--card-bg); }
.outline-topic .ot-head { display: flex; align-items: baseline; gap: 8px; min-width: 0; }
.outline-topic .ot-dot {
  flex: none; width: 6px; height: 6px; border-radius: 50%;
  background: var(--line); align-self: center;
}
.outline-topic.ready .ot-dot { background: var(--cool); }
.outline-topic .ot-title, .outline-topic a {
  font-weight: 600; color: var(--text); line-height: 1.5; word-break: break-word;
}
.outline-topic.ready .ot-title, .outline-topic.ready a { color: var(--accent); }
.outline-topic .ot-note {
  margin: 6px 0 0 14px;
  font-size: 0.84rem;
  line-height: 1.62;
  color: var(--text-secondary);
}

/* ---------- Outline 章节导航 ---------- */
.outline-chapters-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 18px 0 16px;
  margin: 0 0 28px;
  border-bottom: 1px solid var(--line);
}
.outline-chapters-nav .of-chip {
  flex: none;
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--text-secondary);
  border: 1px solid var(--line);
  background: var(--bg);
  text-decoration: none;
  white-space: nowrap;
  cursor: pointer;
  transition: all 0.16s ease;
}
.outline-chapters-nav .of-chip:hover {
  border-color: var(--accent);
  color: var(--accent);
}
.outline-chapters-nav .of-chip.active {
  color: #fff;
  background: var(--accent);
  border-color: var(--accent);
}

/* ---------- Daily ---------- */
.daily-group { margin-bottom: 34px; }
.daily-group h3 {
  font-size: 1.06rem;
  display: flex;
  align-items: center;
  gap: 10px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 14px;
}
.daily-item {
  display: flex;
  gap: 14px;
  padding: 14px 4px;
  border-bottom: 1px solid var(--line-soft);
}
.daily-item:last-child { border-bottom: none; }
.daily-item .idx {
  font-family: var(--font-mono);
  color: var(--text-muted);
  font-size: 0.85rem;
  flex-shrink: 0;
  width: 26px;
  padding-top: 2px;
}
.daily-item a.title { font-weight: 650; color: var(--text); }
.daily-item a.title:hover { color: var(--accent); }
.daily-item .desc { color: var(--text-secondary); font-size: 0.9rem; margin-top: 3px; }
.daily-item .meta { color: var(--text-muted); font-size: 0.78rem; margin-top: 6px; }

/* ---------- Friends ---------- */
.friend-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 18px;
}
.friend-card {
  padding: 20px;
  background: var(--card-bg);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: all 0.18s ease;
}
.friend-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }
.friend-card-head { display: flex; align-items: center; gap: 12px; margin-bottom: 10px; }
.friend-avatar {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  background: var(--accent-soft);
  color: var(--accent);
  display: grid;
  place-items: center;
  font-weight: 800;
  font-size: 1.05rem;
  flex-shrink: 0;
}
.friend-card h3 { margin: 0; font-size: 1.04rem; }
.friend-card .u { color: var(--text-muted); font-size: 0.78rem; word-break: break-all; }
.friend-card p { color: var(--text-secondary); font-size: 0.9rem; margin: 0 0 10px; }

/* ---------- Filter tabs ---------- */
.filter-tabs {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin: 20px 0 26px;
}
.filter-tabs a {
  padding: 8px 16px;
  border-radius: 999px;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-secondary);
  border: 1px solid var(--line);
  background: var(--bg);
}
.filter-tabs a:hover { border-color: var(--ink-200); color: var(--text); }
.filter-tabs a.active {
  color: #fff;
  background: var(--accent);
  border-color: var(--accent);
}

/* ---------- 博客热门推荐 ---------- */
.hot-link {
  display: flex;
  flex-direction: column;
  gap: 3px;
  padding: 10px 12px;
  border-radius: 9px;
  color: var(--text-secondary);
}
.hot-link:hover { background: var(--bg-soft); color: var(--text); }
.hot-link .hot-cat {
  font-size: 0.72rem;
  letter-spacing: 0.03em;
  color: var(--text-muted);
}
.hot-link .hot-title {
  font-size: 0.92rem;
  line-height: 1.5;
  color: var(--text);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.hot-link:hover .hot-title { color: var(--accent); }

/* ---------- 404 ---------- */
.notfound {
  text-align: center;
  padding: 120px 0;
}
.notfound .code {
  font-size: 6rem;
  font-weight: 800;
  color: var(--accent-soft);
  line-height: 1;
}
.notfound h1 { font-size: 1.6rem; margin: 12px 0; }

/* ---------- Footer ---------- */
/* ---------- 站内搜索 ---------- */
.icon-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  transition: color 0.15s ease, border-color 0.15s ease, background 0.15s ease;
}
.icon-button:hover {
  color: var(--accent);
  border-color: var(--accent);
  background: var(--accent-soft);
}
/* 深色切换按钮：浅色模式显示月亮，深色模式显示太阳 */
.theme-toggle .icon-sun { display: none; }
.theme-toggle .icon-moon { display: block; }
:root[data-theme="dark"] .theme-toggle .icon-sun { display: block; }
:root[data-theme="dark"] .theme-toggle .icon-moon { display: none; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) .theme-toggle .icon-sun { display: block; }
  :root:not([data-theme]) .theme-toggle .icon-moon { display: none; }
}
/* ---------- 顶部常驻搜索框 ---------- */
.header-search { position: relative; }
.header-search-box {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 240px;
  height: 40px;
  padding: 0 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--bg-soft);
  color: var(--text-muted);
  transition: border-color 0.15s ease, background 0.15s ease, box-shadow 0.15s ease;
}
.header-search-box svg { flex: none; }
.header-search-box input {
  flex: 1;
  min-width: 0;
  border: none;
  outline: none;
  background: transparent;
  font-family: inherit;
  font-size: 0.92rem;
  color: var(--text);
}
.header-search-box input::placeholder { color: var(--text-muted); }
.header-search-box:focus-within {
  border-color: var(--accent);
  background: var(--card-bg);
  box-shadow: 0 0 0 3px var(--accent-soft);
}
.header-search-panel {
  position: absolute;
  top: calc(100% + 10px);
  right: 0;
  width: 400px;
  max-height: 70vh;
  overflow-y: auto;
  background: var(--card-bg);
  border: 1px solid var(--line);
  border-radius: 14px;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.16);
  z-index: 90;
}
.header-search-panel[hidden] { display: none; }
.search-hint {
  margin: 0;
  padding: 26px 24px;
  font-size: 0.9rem;
  color: var(--text-muted);
}
.search-results {
  list-style: none;
  margin: 0;
  padding: 0;
  max-height: 52vh;
  overflow-y: auto;
}
.search-results li { border-top: 1px solid var(--line); }
.search-results li:first-child { border-top: none; }
.search-results a {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 16px 20px;
  text-decoration: none;
  transition: background 0.12s ease;
}
.search-results a:hover { background: var(--bg-soft); }
.search-badge {
  flex: none;
  margin-top: 3px;
  font-size: 0.72rem;
  font-weight: 650;
  color: var(--accent);
  background: var(--accent-soft);
  border: 1px solid var(--accent-line, transparent);
  padding: 3px 9px;
  border-radius: 999px;
  white-space: nowrap;
}
.search-text { min-width: 0; }
.search-title {
  display: block;
  color: var(--text);
  font-weight: 650;
  font-size: 0.96rem;
  line-height: 1.5;
}
.search-desc {
  display: block;
  margin-top: 3px;
  color: var(--text-secondary);
  font-size: 0.82rem;
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ---------- CTA band ---------- */
.cta-band {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  flex-wrap: wrap;
  padding: 28px 32px;
  border: 1px solid var(--line);
  background: linear-gradient(135deg, var(--bg-soft), transparent);
}
.cta-actions { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }
@media (max-width: 640px) {
  .cta-band { padding: 22px 20px; }
}

.site-footer {
  margin-top: 72px;
  background:
    radial-gradient(1200px 420px at 85% -10%, rgba(31, 175, 160, 0.10), transparent 60%),
    radial-gradient(900px 380px at 0% 120%, rgba(249, 115, 22, 0.08), transparent 55%),
    #0b1526;
  color: #c3cedd;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.7fr 1fr 1.3fr;
  gap: 48px;
  padding: 60px 0 44px;
}
@media (max-width: 980px) {
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 40px 32px; }
}
@media (max-width: 640px) {
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
}

/* 品牌区 */
.footer-brand .site-logo strong { color: #fff; font-size: 1.05rem; letter-spacing: 0.02em; }
.footer-brand .site-logo small { display: block; color: #6b7a93; font-size: 0.66rem; letter-spacing: 0.18em; margin-top: 2px; }
.footer-tagline { color: #9aa8bd; font-size: 0.92rem; line-height: 1.9; max-width: 300px; margin: 20px 0 8px; }
.footer-person { color: #66748c; font-size: 0.82rem; }

/* 栏目 */
.footer-col h4 {
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: #8b9bb3;
  margin: 0 0 18px;
}
.footer-col ul { list-style: none; margin: 0; padding: 0; }
.footer-col li { margin: 9px 0; }
.footer-col a { color: #c3cedd; font-size: 0.92rem; transition: color 0.15s ease; }
.footer-col a:hover { color: var(--accent); }

/* 联系 */
.footer-contact { list-style: none; margin: 0; padding: 0; }
.footer-contact li { display: flex; align-items: center; gap: 12px; margin: 12px 0; font-size: 0.86rem; color: #9aa8bd; line-height: 1.5; }
.footer-contact li b { color: #e8eef7; font-weight: 700; }
.footer-contact .value { color: #e8eef7; font-weight: 600; word-break: break-all; }
.footer-contact a.value:hover { color: var(--accent); }
.footer-contact small {
  display: block;
  font-size: 0.76rem;
  color: var(--accent);
  margin-top: 2px;
  opacity: 0.9;
}
.contact-icon {
  flex: none;
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: #c3cedd;
}

/* 底栏 */
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 20px 0;
  font-size: 0.82rem;
  color: #66748c;
  display: flex;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}
.footer-powered { color: #55617a; }
.footer-disclaimer {
  margin: 0 0 22px;
  padding-top: 16px;
  border-top: 1px dashed rgba(255, 255, 255, 0.06);
  font-size: 0.78rem;
  color: #55617a;
}

/* ---------- Utilities ---------- */
.text-center { text-align: center; }
.mt-0 { margin-top: 0; }
.stack > * + * { margin-top: 16px; }
.hidden { display: none; }

/* ---------- Responsive ---------- */
@media (max-width: 1000px) {
  .cols-3 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 680px) {
  .cols-2, .cols-3 { grid-template-columns: 1fr; }
  .section { padding: 48px 0; }
  .section-tight { padding: 28px 0; }
}
@media (max-width: 560px) {
  .hero { padding: 60px 0 44px; }
  .hero-stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 22px 16px;
    margin-top: 38px;
  }
  .stat .num { font-size: 1.5rem; }
  .hero-actions .btn { flex: 1; min-width: 140px; }
  .friend-grid { grid-template-columns: 1fr; }
  .blog-post-header h1 { font-size: 1.55rem; }
}