/* ============================================================
   Clash 博客首页 · 2026 亮色系视觉主题
   清透蓝 × 薄荷青
   ============================================================ */

/* ---------- 设计变量 ---------- */
:root{
  --p1:#2f8fef;
  --p2:#1fb8a0;
  --p1-soft:#eaf4fe;
  --p2-soft:#e9f9f5;
  --lilac-soft:#f0eeff;
  --lilac:#7c6bf0;
  --amber-soft:#fdf3e3;
  --amber:#e0952f;

  --ink:#12263f;
  --ink-2:#33506e;
  --ink-3:#5a7290;
  --ink-4:#8ba3bd;

  --line:#e2eef9;
  --line-2:#d3e5f6;

  --bg:#ffffff;
  --bg-soft:#f5faff;
  --bg-mint:#f1fbf8;

  --grad:linear-gradient(100deg,#2f8fef 0%,#1fb8a0 100%);
  --grad-soft:linear-gradient(100deg,#eaf4fe,#e9f9f5);

  --shadow:0 14px 34px -18px rgba(35,95,160,.28);
  --shadow-hover:0 22px 46px -20px rgba(35,95,160,.34);

  --radius:16px;
  --radius-sm:12px;
  --ease:.25s cubic-bezier(.4,0,.2,1);
}

/* ---------- Reset ---------- */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  font-family:'Inter','Noto Sans SC',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
  color:var(--ink);
  background:var(--bg);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
a{text-decoration:none;color:inherit;transition:color var(--ease);}
ul{list-style:none;}
img{max-width:100%;display:block;}
button{font-family:inherit;cursor:pointer;}
::selection{background:rgba(47,143,239,.18);}

.container{max-width:1120px;margin:0 auto;padding:0 22px;}

/* ---------- 通用按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 28px;font-size:15px;font-weight:600;
  border-radius:999px;cursor:pointer;
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease),color var(--ease);
  white-space:nowrap;border:2px solid transparent;
}
.btn-primary{
  background:var(--grad);color:#fff;
  border-color:transparent;
  box-shadow:0 18px 36px -16px rgba(47,143,239,.9);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 24px 42px -16px rgba(47,143,239,1);}
.btn-outline{
  background:#fff;color:var(--p1);
  border-color:var(--line-2);
  box-shadow:0 10px 24px -18px rgba(35,95,160,.7);
}
.btn-outline:hover{border-color:var(--p1);transform:translateY(-2px);}

/* ============================================================
   导航（与首页一致）
   ============================================================ */
.sb-nav{
  position:sticky;top:0;z-index:90;
  background:rgba(255,255,255,.86);
  backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
  border-bottom:1px solid var(--line);
}
.sb-nav-inner{
  max-width:1200px;margin:0 auto;padding:0 22px;height:66px;
  display:flex;align-items:center;justify-content:space-between;gap:24px;
}
.sb-logo{
  display:flex;align-items:center;gap:11px;
  color:var(--ink);font-weight:800;font-size:17px;letter-spacing:.2px;
}
.sb-logo-img{
  width:32px;height:32px;border-radius:10px;
  object-fit:cover;background:#fff;
  box-shadow:0 10px 22px -10px rgba(47,143,239,.85);
  flex-shrink:0;
}
.sb-logo span small{
  display:block;font-size:10px;font-weight:600;letter-spacing:1.6px;
  color:var(--ink-4);text-transform:uppercase;margin-top:1px;
}
.sb-nav-links{display:flex;align-items:center;gap:26px;}
.sb-nav-links a{
  color:var(--ink-3);font-size:14.5px;font-weight:500;
}
.sb-nav-links a:hover{color:var(--p1);}
.sb-nav-links a.nav-active{color:var(--p1);font-weight:600;}
.sb-nav-cta{
  display:inline-flex;align-items:center;gap:7px;
  padding:10px 20px;border-radius:999px;
  font-size:14px;font-weight:700;color:#fff;
  background:var(--grad);
  box-shadow:0 14px 28px -14px rgba(47,143,239,.9);
  transition:transform var(--ease),box-shadow var(--ease);
}
.sb-nav-cta:hover{transform:translateY(-1px);box-shadow:0 18px 32px -14px rgba(47,143,239,1);}

/* ============================================================
   博客 Hero
   ============================================================ */
.blog-hero{
  position:relative;overflow:hidden;
  background:
    radial-gradient(900px 520px at 14% -12%,rgba(47,143,239,.15) 0%,transparent 62%),
    radial-gradient(820px 480px at 88% -8%,rgba(31,184,160,.14) 0%,transparent 60%),
    linear-gradient(180deg,#f8fcff 0%,#eef8fd 100%);
  color:var(--ink);
  padding:80px 20px 70px;
}
.blog-hero-inner{
  max-width:1120px;margin:0 auto;
  display:grid;
  grid-template-columns:1.15fr 1fr;
  gap:56px;
  align-items:center;
}
.blog-hero-badge{
  display:inline-flex;align-items:center;gap:8px;
  background:#fff;border:1px solid var(--line-2);
  color:var(--p1);font-weight:600;font-size:12px;
  padding:6px 16px;border-radius:999px;
  margin-bottom:22px;
  box-shadow:0 8px 20px -14px rgba(35,95,160,.6);
}
.blog-hero h1{
  font-size:46px;font-weight:700;
  color:var(--ink);letter-spacing:-.5px;
  margin-bottom:20px;line-height:1.25;
}
.blog-hero h1 .brand{
  background:var(--grad);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.blog-hero-sub{
  font-size:15.5px;color:var(--ink-3);
  margin-bottom:32px;line-height:1.9;
}
.blog-hero-meta{
  display:flex;flex-wrap:wrap;gap:22px;
  font-size:13px;color:var(--ink-3);
}
.blog-hero-meta span{
  display:inline-flex;align-items:center;gap:7px;
}
.blog-hero-meta i{color:var(--p2);font-size:13px;}

/* Hero 右侧的「最新一期」卡片 */
.blog-hero-feature{
  background:#fff;
  border:1px solid var(--line);
  border-radius:20px;
  padding:28px;
  box-shadow:var(--shadow);
  position:relative;
  overflow:hidden;
}
.blog-hero-feature::before{
  content:"";position:absolute;inset:0 0 auto 0;height:4px;
  background:var(--grad);
}
.blog-hero-feature .feat-label{
  display:inline-flex;align-items:center;gap:6px;
  font-size:11px;font-weight:700;letter-spacing:1.6px;
  text-transform:uppercase;
  color:var(--p1);
  padding:4px 12px;border-radius:999px;
  background:var(--p1-soft);
  margin-bottom:16px;
}
.blog-hero-feature h3{
  font-size:19px;font-weight:600;color:var(--ink);
  line-height:1.45;margin-bottom:12px;
}
.blog-hero-feature p{
  font-size:13.5px;color:var(--ink-3);
  line-height:1.85;margin-bottom:18px;
}
.blog-hero-feature .feat-meta{
  display:flex;align-items:center;gap:14px;
  font-size:12.5px;color:var(--ink-4);
  padding-top:16px;
  border-top:1px solid var(--line);
}
.blog-hero-feature .feat-meta span{
  display:inline-flex;align-items:center;gap:6px;
}
.blog-hero-feature .feat-meta i{font-size:11px;}

/* ============================================================
   通用版块头
   ============================================================ */
.section-head{text-align:center;margin-bottom:48px;}
.section-head h2{
  font-size:clamp(24px,3vw,32px);
  font-weight:600;color:var(--ink);
  letter-spacing:-.4px;margin-bottom:14px;line-height:1.3;
}
.section-head p{
  font-size:15.5px;color:var(--ink-3);
  max-width:740px;margin:0 auto;line-height:1.85;
}
.section-label{
  font-size:11px;font-weight:700;letter-spacing:2.6px;
  text-transform:uppercase;color:var(--p1);margin-bottom:14px;
}

/* ============================================================
   分类导航
   ============================================================ */
.blog-cats{
  background:#fff;
  padding:78px 22px 70px;
}
.cats-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:18px;
  max-width:1120px;
  margin:0 auto;
}
.cat-card{
  display:flex;flex-direction:column;
  padding:26px 24px;
  background:var(--bg-soft);
  border:1px solid var(--line);
  border-radius:var(--radius);
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease),background var(--ease);
  position:relative;
  overflow:hidden;
}
.cat-card::before{
  content:"";position:absolute;inset:0 0 auto 0;height:3px;
  background:var(--grad);opacity:0;transition:opacity var(--ease);
}
.cat-card:hover{
  background:#fff;border-color:var(--line-2);
  box-shadow:var(--shadow-hover);transform:translateY(-4px);
}
.cat-card:hover::before{opacity:1;}
.cat-ico{
  width:48px;height:48px;border-radius:13px;
  display:grid;place-items:center;
  font-size:19px;
  background:var(--p1-soft);color:var(--p1);
  margin-bottom:16px;
}
.cat-card:nth-child(2) .cat-ico{background:var(--p2-soft);color:var(--p2);}
.cat-card:nth-child(3) .cat-ico{background:var(--lilac-soft);color:var(--lilac);}
.cat-card:nth-child(4) .cat-ico{background:var(--amber-soft);color:var(--amber);}
.cat-card h3{
  font-size:16.5px;font-weight:600;color:var(--ink);
  margin-bottom:8px;
}
.cat-card p{
  font-size:13.5px;color:var(--ink-3);
  line-height:1.75;margin-bottom:16px;
}
.cat-card .cat-count{
  display:inline-flex;align-items:center;gap:6px;
  font-size:12.5px;font-weight:600;color:var(--p1);
  margin-top:auto;
}
.cat-card .cat-count i{font-size:11px;}

/* ============================================================
   精选文章（大卡片区）
   ============================================================ */
.featured-section{
  background:var(--bg-soft);
  padding:88px 22px;
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}
.featured-grid{
  display:grid;
  grid-template-columns:1.4fr 1fr;
  gap:22px;
  max-width:1120px;
  margin:0 auto;
}
.feature-lead{
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:34px 32px;
  box-shadow:var(--shadow);
  display:flex;flex-direction:column;
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
  position:relative;
  overflow:hidden;
}
.feature-lead::before{
  content:"";position:absolute;inset:0 0 auto 0;height:4px;
  background:var(--grad);
}
.feature-lead:hover{
  transform:translateY(-4px);
  box-shadow:var(--shadow-hover);
  border-color:var(--line-2);
}
.feature-lead .lead-label{
  display:inline-flex;align-items:center;gap:6px;
  font-size:11px;font-weight:700;letter-spacing:1.4px;
  text-transform:uppercase;
  color:var(--p1);
  padding:4px 12px;border-radius:999px;
  background:var(--p1-soft);
  margin-bottom:20px;
  align-self:flex-start;
}
.feature-lead h3{
  font-size:24px;font-weight:600;color:var(--ink);
  line-height:1.4;margin-bottom:14px;letter-spacing:-.2px;
}
.feature-lead p{
  font-size:14.5px;color:var(--ink-3);
  line-height:1.9;margin-bottom:22px;
}
.feature-lead .lead-tags{
  display:flex;flex-wrap:wrap;gap:8px;
  margin-bottom:24px;
}
.feature-lead .lead-tags span{
  font-size:12px;font-weight:500;
  padding:5px 12px;border-radius:8px;
  background:var(--bg-soft);
  border:1px solid var(--line);
  color:var(--ink-2);
}
.feature-lead .lead-meta{
  display:flex;align-items:center;justify-content:space-between;
  gap:16px;flex-wrap:wrap;
  padding-top:20px;
  border-top:1px solid var(--line);
  margin-top:auto;
}
.feature-lead .lead-meta .meta-info{
  display:flex;gap:16px;
  font-size:12.5px;color:var(--ink-4);
}
.feature-lead .lead-meta .meta-info span{
  display:inline-flex;align-items:center;gap:6px;
}
.feature-lead .read-link{
  display:inline-flex;align-items:center;gap:6px;
  font-size:14px;font-weight:600;color:var(--p1);
  transition:gap var(--ease),color var(--ease);
}
.feature-lead .read-link:hover{gap:11px;color:var(--p2);}

.feature-side{
  display:flex;flex-direction:column;gap:18px;
}
.feature-mini{
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:22px 24px;
  flex:1;
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
  display:flex;flex-direction:column;
}
.feature-mini:hover{
  transform:translateX(4px);
  box-shadow:var(--shadow-hover);
  border-color:var(--line-2);
}
.feature-mini .mini-cat{
  display:inline-flex;align-items:center;gap:5px;
  font-size:11px;font-weight:700;letter-spacing:1.2px;
  text-transform:uppercase;
  color:var(--p2);
  margin-bottom:12px;
}
.feature-mini:nth-child(2) .mini-cat{color:var(--lilac);}
.feature-mini:nth-child(3) .mini-cat{color:var(--amber);}
.feature-mini h4{
  font-size:16px;font-weight:600;color:var(--ink);
  line-height:1.5;margin-bottom:10px;
}
.feature-mini p{
  font-size:13px;color:var(--ink-3);
  line-height:1.75;margin-bottom:14px;
}
.feature-mini .mini-meta{
  display:flex;align-items:center;gap:14px;
  font-size:12px;color:var(--ink-4);
  margin-top:auto;
  padding-top:12px;
  border-top:1px solid var(--line);
}
.feature-mini .mini-meta span{
  display:inline-flex;align-items:center;gap:5px;
}

/* ============================================================
   最新文章列表
   ============================================================ */
.latest-section{
  background:#fff;
  padding:88px 22px;
}
.latest-layout{
  max-width:1120px;
  margin:0 auto;
  display:grid;
  grid-template-columns:2fr 1fr;
  gap:44px;
  align-items:start;
}

/* 左侧文章列表 */
.post-list{
  display:flex;flex-direction:column;gap:20px;
}
.post-item{
  display:grid;
  grid-template-columns:1fr 200px;
  gap:24px;
  padding:24px;
  background:var(--bg-soft);
  border:1px solid var(--line);
  border-radius:var(--radius);
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease),background var(--ease);
  align-items:center;
}
.post-item:hover{
  background:#fff;border-color:var(--line-2);
  box-shadow:var(--shadow-hover);transform:translateY(-3px);
}
.post-body{min-width:0;}
.post-cat{
  display:inline-flex;align-items:center;gap:5px;
  font-size:11px;font-weight:700;letter-spacing:1.2px;
  text-transform:uppercase;
  color:var(--p1);
  padding:3px 10px;border-radius:999px;
  background:var(--p1-soft);
  margin-bottom:12px;
}
.post-item:nth-child(2) .post-cat{color:var(--p2);background:var(--p2-soft);}
.post-item:nth-child(3) .post-cat{color:var(--lilac);background:var(--lilac-soft);}
.post-item:nth-child(4) .post-cat{color:var(--amber);background:var(--amber-soft);}
.post-item:nth-child(5) .post-cat{color:var(--ink-2);background:#eef4fb;}
.post-item:nth-child(6) .post-cat{color:var(--p1);background:var(--p1-soft);}
.post-item h3{
  font-size:18px;font-weight:600;color:var(--ink);
  line-height:1.45;margin-bottom:10px;
}
.post-item p{
  font-size:13.5px;color:var(--ink-3);
  line-height:1.8;margin-bottom:14px;
}
.post-meta{
  display:flex;align-items:center;gap:16px;flex-wrap:wrap;
  font-size:12.5px;color:var(--ink-4);
}
.post-meta span{
  display:inline-flex;align-items:center;gap:6px;
}
.post-meta i{font-size:11px;}

.post-visual{
  height:120px;
  border-radius:12px;
  background:var(--grad-soft);
  display:grid;place-items:center;
  color:var(--p1);
  font-size:36px;
  flex-shrink:0;
}
.post-item:nth-child(2) .post-visual{color:var(--p2);background:linear-gradient(100deg,#e9f9f5,#eaf4fe);}
.post-item:nth-child(3) .post-visual{color:var(--lilac);background:linear-gradient(100deg,#f0eeff,#eaf4fe);}
.post-item:nth-child(4) .post-visual{color:var(--amber);background:linear-gradient(100deg,#fdf3e3,#e9f9f5);}
.post-item:nth-child(5) .post-visual{color:var(--ink-2);background:linear-gradient(100deg,#eef4fb,#eaf4fe);}
.post-item:nth-child(6) .post-visual{color:var(--p1);background:linear-gradient(100deg,#eaf4fe,#f0eeff);}

/* 右侧边栏 */
.sidebar{
  display:flex;flex-direction:column;gap:22px;
  position:sticky;
  top:90px;
}
.side-card{
  background:var(--bg-soft);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:24px 22px;
}
.side-card h4{
  font-size:14px;font-weight:700;letter-spacing:.3px;
  color:var(--ink);margin-bottom:16px;
  padding-bottom:14px;
  border-bottom:1px solid var(--line);
  display:flex;align-items:center;gap:9px;
}
.side-card h4 i{color:var(--p1);font-size:15px;}

/* 热门标签 */
.tag-cloud{
  display:flex;flex-wrap:wrap;gap:8px;
}
.tag-cloud a{
  font-size:12.5px;font-weight:500;
  padding:6px 13px;border-radius:999px;
  background:#fff;border:1px solid var(--line);
  color:var(--ink-2);
  transition:all var(--ease);
}
.tag-cloud a:hover{
  border-color:var(--p1);color:var(--p1);
  background:var(--p1-soft);transform:translateY(-1px);
}

/* 排行榜 */
.rank-list{
  display:flex;flex-direction:column;gap:2px;
}
.rank-item{
  display:flex;align-items:flex-start;gap:12px;
  padding:11px 0;
  border-bottom:1px dashed var(--line);
  transition:padding var(--ease);
}
.rank-item:last-child{border-bottom:none;}
.rank-item:hover{padding-left:6px;}
.rank-num{
  font-size:14px;font-weight:800;
  width:22px;flex-shrink:0;
  font-variant-numeric:tabular-nums;
  background:var(--grad);
  -webkit-background-clip:text;background-clip:text;
  color:transparent;
  line-height:1.5;
  text-align:center;
}
.rank-item:nth-child(n+4) .rank-num{
  color:var(--ink-4);
  background:none;
  -webkit-text-fill-color:var(--ink-4);
}
.rank-item .rank-text{
  font-size:13.5px;color:var(--ink-2);
  line-height:1.65;
  transition:color var(--ease);
}
.rank-item:hover .rank-text{color:var(--p1);}

/* 订阅小卡片 */
.sub-mini-card{
  background:linear-gradient(100deg,#f2f9ff,#eaf9f5);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:24px 22px;
}
.sub-mini-card h4{
  font-size:14px;font-weight:700;color:var(--ink);
  margin-bottom:10px;
  display:flex;align-items:center;gap:9px;
}
.sub-mini-card h4 i{color:var(--p2);font-size:15px;}
.sub-mini-card p{
  font-size:13px;color:var(--ink-3);
  line-height:1.75;margin-bottom:16px;
}
.sub-mini-card .btn{
  width:100%;
  padding:11px 20px;
  font-size:13.5px;
}

/* ============================================================
   专题聚合
   ============================================================ */
.topics-section{
  background:var(--bg-soft);
  padding:88px 22px;
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}
.topics-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:22px;
  max-width:1120px;
  margin:0 auto;
}
.topic-card{
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:28px 26px;
  box-shadow:0 10px 28px -20px rgba(35,95,160,.5);
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
  display:flex;flex-direction:column;
  position:relative;
  overflow:hidden;
}
.topic-card::before{
  content:"";position:absolute;inset:0 0 auto 0;height:3px;
  background:var(--grad);
  opacity:0;
  transition:opacity var(--ease);
}
.topic-card:hover{
  transform:translateY(-4px);
  box-shadow:var(--shadow-hover);
  border-color:var(--line-2);
}
.topic-card:hover::before{opacity:1;}
.topic-ico{
  width:52px;height:52px;border-radius:14px;
  display:grid;place-items:center;
  font-size:22px;
  background:var(--p1-soft);color:var(--p1);
  margin-bottom:18px;
}
.topic-card:nth-child(2) .topic-ico{background:var(--p2-soft);color:var(--p2);}
.topic-card:nth-child(3) .topic-ico{background:var(--lilac-soft);color:var(--lilac);}
.topic-card h3{
  font-size:17px;font-weight:600;color:var(--ink);
  margin-bottom:10px;
}
.topic-card p{
  font-size:13.5px;color:var(--ink-3);
  line-height:1.8;margin-bottom:18px;
}
.topic-links{
  display:flex;flex-direction:column;gap:10px;
  margin-top:auto;
  padding-top:16px;
  border-top:1px dashed var(--line);
}
.topic-links a{
  display:flex;align-items:center;gap:9px;
  font-size:13px;color:var(--ink-3);
  line-height:1.6;
  transition:color var(--ease),padding var(--ease);
}
.topic-links a:hover{color:var(--p1);padding-left:4px;}
.topic-links a i{
  font-size:10px;color:var(--p1);opacity:.7;
  flex-shrink:0;margin-top:2px;
}

/* ============================================================
   关于博客
   ============================================================ */
.about-section{
  background:#fff;
  padding:88px 22px;
}
.about-inner{
  max-width:1000px;
  margin:0 auto;
  background:linear-gradient(100deg,#f5faff,#eaf9f5);
  border:1px solid var(--line);
  border-radius:20px;
  padding:52px 48px;
  box-shadow:var(--shadow);
}
.about-inner .about-label{
  display:inline-flex;align-items:center;gap:8px;
  font-size:11px;font-weight:700;letter-spacing:2px;
  text-transform:uppercase;
  color:var(--p1);
  margin-bottom:16px;
}
.about-inner h2{
  font-size:28px;font-weight:600;color:var(--ink);
  margin-bottom:18px;letter-spacing:-.3px;
}
.about-inner > p{
  font-size:15px;color:var(--ink-3);
  line-height:1.9;margin-bottom:28px;
}
.about-points{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:18px;
}
.about-point{
  background:#fff;
  border:1px solid var(--line);
  border-radius:14px;
  padding:22px 20px;
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.about-point:hover{
  transform:translateY(-3px);
  box-shadow:var(--shadow);
  border-color:var(--line-2);
}
.about-point i{
  font-size:22px;color:var(--p1);
  margin-bottom:12px;display:block;
}
.about-point:nth-child(2) i{color:var(--p2);}
.about-point:nth-child(3) i{color:var(--lilac);}
.about-point h4{
  font-size:15px;font-weight:600;color:var(--ink);
  margin-bottom:8px;
}
.about-point p{
  font-size:13px;color:var(--ink-3);
  line-height:1.75;
}

/* ============================================================
   订阅引导
   ============================================================ */
.subscribe-section{
  background:var(--bg-soft);
  padding:88px 22px;
  border-top:1px solid var(--line);
}
.subscribe-inner{
  max-width:900px;
  margin:0 auto;
  text-align:center;
}
.subscribe-inner h2{
  font-size:30px;font-weight:600;color:var(--ink);
  letter-spacing:-.3px;margin-bottom:16px;
}
.subscribe-inner p{
  font-size:15px;color:var(--ink-3);
  line-height:1.9;max-width:640px;
  margin:0 auto 34px;
}
.subscribe-actions{
  display:flex;justify-content:center;gap:14px;
  flex-wrap:wrap;
}

/* ============================================================
   页脚（与首页一致）
   ============================================================ */
.site-footer{
  position:relative;
  background:
    radial-gradient(700px 320px at 8% 0%, rgba(47,143,239,.08) 0%, transparent 62%),
    radial-gradient(600px 300px at 92% 0%, rgba(31,184,160,.07) 0%, transparent 60%),
    linear-gradient(180deg,#ffffff 0%,#f5faff 100%);
  border-top:1px solid var(--line);
  padding:64px 0 26px;
  color:var(--ink);
  font-size:14px;
}
.footer-inner{max-width:1120px;margin:0 auto;padding:0 22px;}
.footer-grid{
  display:grid;
  grid-template-columns:1.7fr 1fr 1fr 1fr;
  gap:40px;
  padding-bottom:42px;
  border-bottom:1px solid var(--line);
}
.footer-brand{
  display:inline-flex;align-items:center;gap:10px;
  font-size:17px;font-weight:800;color:var(--ink);
  margin-bottom:14px;
}
.footer-brand-img{
  width:30px;height:30px;border-radius:9px;
  object-fit:cover;background:#fff;
  box-shadow:0 10px 22px -10px rgba(47,143,239,.85);
  flex-shrink:0;
}
.footer-brand:hover{color:var(--p1);}
.footer-desc{
  font-size:13.5px;line-height:1.85;
  color:var(--ink-3);max-width:340px;
  margin-bottom:18px;
}
.footer-gh{
  display:inline-flex;align-items:center;gap:7px;
  padding:8px 14px;border-radius:999px;
  background:#fff;border:1px solid var(--line);
  font-size:13px;font-weight:600;color:var(--ink-2);
  transition:border-color var(--ease),color var(--ease),transform var(--ease);
}
.footer-gh i{color:var(--ink);}
.footer-gh:hover{
  border-color:var(--p1);color:var(--p1);
  transform:translateY(-1px);
}
.footer-col h4{
  font-size:13.5px;font-weight:700;
  color:var(--ink);margin-bottom:16px;
  letter-spacing:.2px;
}
.footer-col ul{display:flex;flex-direction:column;gap:11px;}
.footer-col ul a{
  display:inline-flex;align-items:center;gap:7px;
  font-size:13.5px;color:var(--ink-3);
  transition:color var(--ease);
}
.footer-col ul a i{font-size:10px;color:var(--p1);opacity:.7;}
.footer-col ul a:hover{color:var(--p1);}
.footer-col ul a:hover i{opacity:1;}

.footer-bottom{
  padding-top:24px;
  display:flex;justify-content:space-between;align-items:center;
  gap:16px;flex-wrap:wrap;
  font-size:12.5px;color:var(--ink-4);
}
.footer-bottom-links{display:flex;gap:18px;}
.footer-bottom-links a{color:var(--ink-4);}
.footer-bottom-links a:hover{color:var(--p1);}

/* ============================================================
   响应式
   ============================================================ */
@media (max-width:980px){
  .sb-nav-links{display:none;}
  .blog-hero-inner{grid-template-columns:1fr;gap:36px;}
  .blog-hero h1{font-size:36px;}
  .cats-grid{grid-template-columns:repeat(2,1fr);}
  .featured-grid{grid-template-columns:1fr;}
  .latest-layout{grid-template-columns:1fr;gap:36px;}
  .sidebar{position:static;}
  .topics-grid{grid-template-columns:1fr;}
  .about-points{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
}
@media (max-width:640px){
  .blog-hero{padding:60px 20px;}
  .blog-hero h1{font-size:26px;}
  .blog-hero-sub{font-size:14.5px;}
  .blog-hero-meta{gap:14px;font-size:12px;}
  .cats-grid{grid-template-columns:1fr;gap:14px;}
  .cat-card{padding:22px 20px;}
  .feature-lead{padding:26px 22px;}
  .feature-lead h3{font-size:19px;}
  .post-item{grid-template-columns:1fr;gap:14px;padding:20px;}
  .post-visual{height:96px;font-size:30px;}
  .post-item h3{font-size:16.5px;}
  .about-inner{padding:32px 24px;}
  .about-inner h2{font-size:22px;}
  .subscribe-inner h2{font-size:22px;}
  .subscribe-actions{flex-direction:column;align-items:center;}
  .subscribe-actions .btn{width:100%;max-width:300px;}
  .site-footer{padding-top:48px;}
  .footer-grid{grid-template-columns:1fr;gap:28px;padding-bottom:32px;}
  .footer-bottom{flex-direction:column;text-align:center;}
  .footer-bottom-links{justify-content:center;flex-wrap:wrap;}
}