/* ============================================================
   HowToLiveBetter · 高性价比人生指南 — 浅色高级编辑感主题
   ============================================================ */
:root{
  --paper:#F8F6F1; --card:#FFFFFF; --mist:#EFEBE3;
  --ink:#1F2D2A; --ink-2:#4A5F5A; --ink-3:#7A8D88;
  --brand:#0F766E; --brand-2:#115E59; --amber:#D97706; --amber-soft:#FDE68A;
  --line:#E3E7E1;
  --serif:'Noto Serif SC','Songti SC',SimSun,serif;
  --sans:'Noto Sans SC','PingFang SC','Microsoft YaHei',system-ui,sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--sans);background:var(--paper);color:var(--ink);line-height:1.8;font-size:16px;-webkit-font-smoothing:antialiased}
.wrap{max-width:1120px;margin:0 auto;padding:0 24px}
a{color:inherit;text-decoration:none}
img{max-width:100%}
::selection{background:var(--amber-soft)}
mark{background:var(--amber-soft);padding:0 2px;border-radius:3px}

/* ============ 顶部导航 ============ */
.site-header{position:sticky;top:0;z-index:50;background:rgba(248,246,241,.9);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.header-inner{display:flex;align-items:center;justify-content:space-between;padding:13px 0;gap:16px}
.brand{display:flex;align-items:center;gap:10px;flex:none}
.brand svg{flex:none;display:block}
.brand-text{display:flex;flex-direction:column;line-height:1.2}
.brand-text b{font-family:var(--serif);font-weight:700;font-size:17px;letter-spacing:.2px;color:var(--ink)}
.brand-text small{font-size:10.5px;color:var(--ink-3);letter-spacing:2.5px;font-weight:500}
.nav{display:flex;align-items:center;gap:4px;flex-wrap:wrap}
.nav a{padding:7px 14px;border-radius:8px;font-size:14px;color:var(--ink-2);transition:background .15s,color .15s}
.nav a:hover{background:var(--mist);color:var(--ink)}
.nav a.on{color:var(--brand-2);font-weight:600}
.btn{display:inline-flex;align-items:center;gap:8px;border:0;border-radius:999px;padding:9px 18px;font-size:14px;font-weight:600;font-family:inherit;cursor:pointer;transition:transform .15s,box-shadow .15s,background .2s}
.btn:hover{transform:translateY(-1px)}
.btn-solid{background:var(--brand);color:#fff;box-shadow:0 4px 14px rgba(15,118,110,.22)}
.btn-solid:hover{background:var(--brand-2)}
.btn-line{background:transparent;color:var(--brand-2);border:1px solid var(--brand);padding:7px 14px;font-size:13px}
.btn-line:hover{background:rgba(15,118,110,.06)}
.btn-sm{padding:8px 14px;font-size:13px}

/* ============ Hero ============ */
.hero{position:relative;border-bottom:1px solid var(--line);padding:96px 0 88px;
  background:linear-gradient(105deg,rgba(248,246,241,.97) 0%,rgba(248,246,241,.9) 45%,rgba(248,246,241,.3) 100%),url('assets/light-dataviz.jpg') center/cover no-repeat}
.hero h1{font-family:var(--serif);font-weight:700;font-size:clamp(30px,4.6vw,50px);line-height:1.35;letter-spacing:1px;max-width:680px}
.hero-sub{margin-top:20px;max-width:580px;color:var(--ink-2);font-size:15.5px;line-height:1.9}
.hero-sub strong{color:var(--ink);font-weight:600}
.hero-search{display:flex;gap:10px;max-width:580px;margin-top:34px}
.hero-search input{flex:1;border:1.5px solid var(--line);background:var(--card);border-radius:14px;padding:14px 18px;font-size:15px;font-family:inherit;color:var(--ink);outline:0;transition:border-color .2s,box-shadow .2s;min-width:0}
.hero-search input:focus{border-color:var(--brand);box-shadow:0 0 0 3px rgba(15,118,110,.1)}
.hero-search button{border:0;border-radius:14px;background:var(--amber);color:#fff;padding:0 26px;font-size:14.5px;font-weight:600;font-family:inherit;cursor:pointer;transition:background .2s;flex:none}
.hero-search button:hover{background:#b45309}
.hero-stats{display:grid;grid-template-columns:repeat(4,1fr);max-width:880px;margin-top:48px;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.hero-stats .stat{padding:20px 22px 18px;border-right:1px solid var(--line);position:relative}
.hero-stats .stat:last-child{border-right:0}
.hero-stats .no{position:absolute;top:12px;left:22px;font-family:var(--serif);font-size:11px;color:var(--ink-3);letter-spacing:1px}
.hero-stats strong{display:block;font-family:var(--serif);font-weight:900;font-size:clamp(32px,3.6vw,46px);line-height:1.1;margin-top:6px;letter-spacing:1px}
.hero-stats .stat:nth-child(2) strong{color:var(--amber)}
.hero-stats .stat:nth-child(4) strong{color:var(--brand)}
.hero-stats .stat span:last-child{display:block;margin-top:6px;font-size:13.5px;font-weight:600;color:var(--ink-2)}

/* ============ 区块标题 ============ */
section{margin:0}
section > h2{font-family:var(--serif);font-weight:700;font-size:clamp(24px,3vw,32px);letter-spacing:.5px;margin-bottom:8px}
section > h2 .tick{color:var(--amber)}
.sec-sub{color:var(--ink-3);font-size:13.5px;margin-bottom:34px}

/* ============ 精选卡片 ============ */
.featured{padding:72px 0;border-bottom:1px solid var(--line)}
.featured-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
.featured-card{display:block;background:var(--card);border:1px solid var(--line);border-radius:16px;padding:26px 26px 22px;position:relative;overflow:hidden;box-shadow:0 1px 4px rgba(31,45,42,.04);transition:transform .22s,box-shadow .22s,border-color .22s}
.featured-card:hover{transform:translateY(-3px);box-shadow:0 14px 34px rgba(31,45,42,.09);border-color:#CBD8D2}
.card-no{position:absolute;top:18px;right:22px;font-family:var(--serif);font-size:12px;color:var(--ink-3);letter-spacing:1px}
.tags{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:14px}
.tag{display:inline-flex;align-items:center;border-radius:999px;padding:3px 11px;font-size:11.5px;font-weight:600;letter-spacing:.5px}
.tag-ev{background:var(--brand);color:#fff}
.tag-hi{background:var(--amber);color:#fff}
.tag-gh{background:var(--mist);color:var(--ink-2)}
.featured-card h3{font-family:var(--serif);font-weight:700;font-size:19px;line-height:1.5;padding-right:34px}
.featured-card p{margin-top:10px;color:var(--ink-2);font-size:14px;line-height:1.85}
.arrow{margin-top:16px;display:inline-flex;align-items:center;gap:6px;font-size:13px;color:var(--brand-2);font-weight:600;transition:gap .2s}
.arrow::after{content:'';width:14px;height:14px;border-top:1.5px solid var(--brand);border-right:1.5px solid var(--brand);transform:rotate(45deg);display:inline-block}
.featured-card:hover .arrow{gap:10px}

/* ============ 主题索引 ============ */
.topics{padding:72px 0;border-bottom:1px solid var(--line)}
.topics-grid{display:grid;grid-template-columns:1fr 1fr;column-gap:56px;border-top:1px solid var(--line)}
.topic-card{display:flex;align-items:center;gap:14px;padding:14px 6px;border-bottom:1px solid var(--line);transition:background .15s,padding-left .2s}
.topic-card:hover{background:rgba(15,118,110,.045);padding-left:12px}
.topic-num{font-family:var(--serif);font-size:13px;color:var(--ink-3);letter-spacing:1px;flex:none;width:30px}
.topic-card h3{font-family:var(--serif);font-weight:600;font-size:16px;flex:1;transition:color .15s}
.topic-card:hover h3{color:var(--brand-2)}
.topic-card p{font-size:12px;color:var(--ink-3);flex:none}
.topic-card .arrow{margin:0;flex:none;transform:rotate(45deg)}
.topic-card .arrow::after{content:'';width:12px;height:12px;border-top:1.5px solid var(--line);border-right:1.5px solid var(--line);transform:none}
.topic-card:hover .arrow::after{border-color:var(--amber)}

/* ============ 通用组件 ============ */
.crumbs{font-size:13px;color:var(--ink-3);margin:26px 0 18px}
.crumbs a{color:var(--brand-2);transition:color .15s}
.crumbs a:hover{text-decoration:underline}
.notice{background:var(--mist);border:1px solid var(--line);border-radius:12px;padding:20px 22px;color:var(--ink-2);font-size:14.5px;margin:18px 0}
.notice a{color:var(--brand-2);font-weight:600}
.notice a:hover{text-decoration:underline}

/* ============ 主题页 ============ */
.topic-head{padding:34px 0 10px}
.topic-head h1{font-family:var(--serif);font-weight:900;font-size:clamp(28px,4vw,40px);line-height:1.35;letter-spacing:.5px}
.topic-intro{margin-top:16px;color:var(--ink-2);font-size:15px;line-height:1.95;max-width:720px}
.topic-intro p{margin-bottom:10px}
.topic-count{margin-top:14px;color:var(--ink-3);font-size:13px}
.item-list{margin-top:26px}
.item-row{padding:26px 2px;border-bottom:1px solid var(--line)}
.item-row:first-child{border-top:1px solid var(--line)}
.item-head{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin-bottom:12px}
.item-num{font-family:var(--serif);font-size:13px;color:var(--ink-3);letter-spacing:1px}
.badge{display:inline-flex;align-items:center;border-radius:999px;padding:3px 11px;font-size:11.5px;font-weight:600;letter-spacing:.5px}
.badge-极高{background:var(--amber);color:#fff}
.badge-高{background:var(--mist);color:var(--ink-2)}
.badge-一般{background:transparent;border:1px solid var(--line);color:var(--ink-3);font-weight:500}
.badge-level{background:var(--brand);color:#fff}
.badge-dim{background:transparent;border:1px solid var(--line);color:var(--ink-3);font-weight:500}
.badge-tag{background:transparent;border:1px solid var(--line);color:var(--ink-3);font-weight:500}
.item-main h2{font-family:var(--serif);font-weight:700;font-size:21px;line-height:1.45}
.item-main h2 a{transition:color .15s}
.item-main h2 a:hover{color:var(--brand-2)}
.item-plain{margin-top:12px;color:var(--ink-2);font-size:14.5px;line-height:1.9;max-width:760px}
.item-plain p{margin-bottom:8px}
.readmore{display:inline-block;margin-top:14px;font-size:13.5px;color:var(--brand-2);font-weight:600;transition:color .15s}
.readmore:hover{text-decoration:underline}
.sec-nav{display:flex;justify-content:space-between;gap:12px;margin:34px 0 60px}
.sec-nav a{background:var(--card);border:1px solid var(--line);border-radius:999px;padding:9px 20px;font-size:14px;color:var(--ink-2);transition:border-color .15s,color .15s}
.sec-nav a:hover{border-color:var(--brand);color:var(--brand-2)}

/* ============ 条目详情 ============ */
.item-detail{max-width:820px;padding:30px 0 10px}
.detail-head{padding-bottom:22px;border-bottom:1px solid var(--line)}
.detail-badges{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:18px}
.detail-head h1{font-family:var(--serif);font-weight:900;font-size:clamp(24px,3.6vw,36px);line-height:1.4;letter-spacing:.5px}
.field{padding:26px 0;border-bottom:1px solid var(--line)}
.field h2{font-family:var(--sans);font-size:13px;color:var(--brand-2);letter-spacing:1.5px;font-weight:700;margin-bottom:12px;display:flex;align-items:center;gap:9px}
.field h2::before{content:'';width:12px;height:1.5px;background:var(--amber);flex:none}
.field-body{font-size:15px;color:var(--ink-2);line-height:2}
.field-body p{margin-bottom:10px}
.field-body ul,.field-body ol{margin:8px 0 10px;padding-left:22px}
.field-body li{margin-bottom:6px}
.field-body a{color:var(--brand-2);text-decoration:underline;word-break:break-all}
.field-body.note{color:var(--ink-3);font-size:14px}
.field-body.source{font-size:13.5px;line-height:1.9}
.detail-nav{display:grid;grid-template-columns:1fr auto 1fr;gap:14px;align-items:center;margin:36px 0 70px}
.detail-nav a{display:block;background:var(--card);border:1px solid var(--line);border-radius:14px;padding:14px 18px;font-size:13px;color:var(--ink-2);line-height:1.6;transition:border-color .15s,color .15s}
.detail-nav a:hover{border-color:var(--brand);color:var(--brand-2)}
.detail-nav .prev{justify-self:start;max-width:300px}
.detail-nav .next{justify-self:end;text-align:right;max-width:300px}
.detail-nav .up{justify-self:center;white-space:nowrap;border-color:var(--brand);color:var(--brand-2);font-weight:600}
.detail-nav .prev br,.detail-nav .next br{display:none}

/* ============ 检索页 ============ */
.search-head{padding:34px 0 12px}
.search-head h1{font-family:var(--serif);font-weight:900;font-size:clamp(28px,4vw,40px);letter-spacing:.5px;margin-bottom:8px}
.search-form{display:flex;gap:10px;flex-wrap:wrap;margin-top:22px;max-width:860px}
.search-form input{flex:1 1 220px;border:1.5px solid var(--line);background:var(--card);border-radius:14px;padding:13px 18px;font-size:15px;font-family:inherit;color:var(--ink);outline:0;transition:border-color .2s,box-shadow .2s;min-width:0}
.search-form input:focus{border-color:var(--brand);box-shadow:0 0 0 3px rgba(15,118,110,.1)}
.search-form select{border:1px solid var(--line);background:var(--card);border-radius:12px;padding:12px 14px;font-size:13.5px;font-family:inherit;color:var(--ink-2);outline:0;cursor:pointer}
.search-form button{border:0;border-radius:14px;background:var(--amber);color:#fff;padding:0 28px;font-size:14.5px;font-weight:600;font-family:inherit;cursor:pointer;transition:background .2s}
.search-form button:hover{background:#b45309}
.search-hint{margin-top:18px;color:var(--ink-3);font-size:13px}
.search-results{margin-top:20px}
.result-row{padding:24px 2px;border-bottom:1px solid var(--line)}
.result-row:first-child{border-top:1px solid var(--line)}
.result-row .loc{margin-left:auto;font-family:var(--serif);font-size:13px;color:var(--ink-3);letter-spacing:.5px}
.result-row h2{font-family:var(--serif);font-weight:700;font-size:19px;line-height:1.45;margin-top:12px}
.result-row h2 a{transition:color .15s}
.result-row h2 a:hover{color:var(--brand-2)}
.result-plain{margin-top:10px;color:var(--ink-2);font-size:14px;line-height:1.9;max-width:760px}
.result-plain p{margin-bottom:8px}
.pager{display:flex;justify-content:center;align-items:center;gap:16px;margin:34px 0 60px;font-size:14px;color:var(--ink-3)}
.pager a{color:var(--brand-2);font-weight:600}
.pager a:hover{text-decoration:underline}

/* ============ 页脚 ============ */
.site-footer{background:var(--ink);color:#E7EFEB;padding:64px 0 40px;position:relative;overflow:hidden}
.site-footer::before{content:'';position:absolute;top:24px;right:24px;width:300px;height:300px;border-radius:50%;background:radial-gradient(circle,rgba(15,118,110,.5),transparent 62%)}
.site-footer .wrap{position:relative}
.foot-slogan{font-family:var(--serif);font-weight:700;font-size:clamp(26px,3.6vw,40px);letter-spacing:1px}
.foot-slogan em{font-style:normal;color:var(--amber-soft)}
.foot-cta{margin-top:26px;display:flex;gap:12px;flex-wrap:wrap}
.site-footer .foot-meta{margin-top:44px;border-top:1px solid rgba(255,255,255,.14);padding-top:24px;font-size:12.5px;color:rgba(231,239,235,.62);line-height:1.9}
.site-footer .foot-meta p{margin-bottom:4px}
.site-footer .foot-meta a{color:rgba(231,239,235,.85);text-decoration:underline}

/* ============ 响应式 ============ */
@media (max-width:900px){
  .hero{padding:72px 0 64px}
  .hero-stats{grid-template-columns:1fr 1fr}
  .hero-stats .stat:nth-child(2){border-right:0}
  .hero-stats .stat:nth-child(1),.hero-stats .stat:nth-child(2){border-bottom:1px solid var(--line)}
  .featured-grid{grid-template-columns:1fr}
  .topics-grid{grid-template-columns:1fr;column-gap:0}
  .detail-nav{grid-template-columns:1fr;gap:10px}
  .detail-nav .prev,.detail-nav .next{justify-self:stretch;max-width:none;text-align:left}
  .detail-nav .up{justify-self:stretch}
}
@media (max-width:560px){
  .brand-text b{font-size:15px}
  .brand-text small{font-size:9.5px;letter-spacing:1.5px}
  .nav a{padding:6px 9px;font-size:13px}
  .nav .btn{display:none}
  .hero h1{font-size:28px}
  .hero-search{flex-direction:column}
  .hero-search button{width:100%;padding:13px 0}
  .hero-stats .stat{padding:16px 16px 14px}
  .hero-stats .no{left:16px}
  .featured,.topics{padding:52px 0}
  .search-form button{width:100%;padding:13px 0}
}
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *{animation:none!important;transition:none!important}
}