:root{
  --bg:#f5f6f2;
  --surface:#fff;
  --surface-soft:#edf3ef;
  --ink:#17231e;
  --muted:#67736c;
  --green:#0b756b;
  --green-dark:#07574f;
  --green-soft:#dff1ed;
  --warm:#f4eee5;
  --warm-deep:#8b5b42;
  --alert:#8e4538;
  --line:#dce5df;
  --shadow:0 22px 65px rgba(20,49,39,.10);
  --max:1080px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:linear-gradient(150deg,#fbfcfa 0%,var(--bg) 52%,#eef2ed 100%);color:var(--ink);font-family:"Noto Sans SC",Inter,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;line-height:1.72}
body[data-language="zh"] [data-copy="en"],body[data-language="en"] [data-copy="zh"]{display:none!important}
a{color:inherit;text-decoration:none}
button{font:inherit}
.wrap{width:min(calc(100% - 32px),var(--max));margin:auto}
.topbar{position:sticky;top:10px;z-index:50;width:min(calc(100% - 24px),var(--max));margin:10px auto 0;padding:11px 13px;display:flex;align-items:center;justify-content:space-between;gap:18px;background:rgba(255,255,255,.91);border:1px solid rgba(255,255,255,.86);border-radius:20px;box-shadow:0 10px 32px rgba(20,49,39,.08);backdrop-filter:blur(18px)}
.brand{display:flex;align-items:center;gap:10px;min-width:0}.brand-mark{width:42px;height:42px;flex:0 0 42px;border-radius:50%;display:grid;place-items:center;background:var(--green);color:#fff;font-weight:900}.brand strong,.brand small{display:block}.brand strong{letter-spacing:-.02em}.brand small{color:var(--muted);font-size:.7rem;white-space:nowrap}
.top-actions{display:flex;align-items:center;gap:9px}.language-switch{display:flex;padding:3px;background:#edf2ef;border-radius:999px}.language-switch button{border:0;background:transparent;color:var(--muted);border-radius:999px;padding:7px 9px;font-size:.73rem;font-weight:800;cursor:pointer}.language-switch button.active{background:#fff;color:var(--green-dark);box-shadow:0 3px 10px rgba(20,49,39,.09)}
.top-link{display:inline-flex;align-items:center;min-height:40px;padding:0 15px;border-radius:999px;background:var(--green);color:#fff;font-size:.8rem;font-weight:800}
.hero{padding:78px 0 54px}.hero-inner{max-width:860px}.eyebrow{margin:0 0 13px;color:var(--green);font-size:.76rem;font-weight:850;letter-spacing:.13em;text-transform:uppercase}h1,h2,h3{font-family:"Noto Serif SC",Georgia,serif;line-height:1.17;letter-spacing:-.035em;margin-top:0}h1{font-size:clamp(2.8rem,7.5vw,5.3rem);margin-bottom:22px}h2{font-size:clamp(2rem,4.5vw,3.15rem);margin-bottom:14px}h3{font-size:1.25rem;margin-bottom:9px}.lead{max-width:720px;color:var(--muted);font-size:clamp(1rem,2vw,1.16rem)}
.guide-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;padding:10px 0 90px}.guide-card{position:relative;min-height:330px;padding:30px;display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line);border-radius:26px;box-shadow:var(--shadow);overflow:hidden;transition:transform .22s ease,box-shadow .22s ease}.guide-card:hover{transform:translateY(-4px);box-shadow:0 28px 70px rgba(20,49,39,.14)}.guide-card::after{content:"";position:absolute;width:180px;height:180px;border-radius:50%;right:-70px;top:-70px;background:var(--green-soft)}.guide-card.warm::after{background:#eee1d2}.guide-number{position:relative;z-index:1;width:54px;height:54px;display:grid;place-items:center;border-radius:17px;background:var(--green-soft);color:var(--green-dark);font-weight:900;font-size:1.15rem}.guide-card.warm .guide-number{background:#eee1d2;color:var(--warm-deep)}.guide-card h2{position:relative;z-index:1;margin:28px 0 12px;font-size:clamp(1.75rem,3vw,2.5rem)}.guide-card p{color:var(--muted);margin:0}.guide-action{margin-top:auto;padding-top:28px;color:var(--green);font-weight:850}.status{display:inline-flex;margin-top:auto;align-self:flex-start;padding:9px 12px;border-radius:999px;background:var(--warm);color:var(--warm-deep);font-size:.78rem;font-weight:800}
.article-hero{padding:66px 0 38px}.breadcrumbs{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:24px;color:var(--muted);font-size:.82rem}.breadcrumbs a{color:var(--green);font-weight:750}.article-hero h1{max-width:900px}.article-meta{display:flex;gap:10px 18px;flex-wrap:wrap;color:var(--muted);font-size:.84rem}
.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 260px;gap:34px;align-items:start;padding-bottom:110px}.article{min-width:0}.article section{scroll-margin-top:100px;margin:0 0 22px;padding:34px;background:var(--surface);border:1px solid var(--line);border-radius:24px;box-shadow:0 12px 38px rgba(20,49,39,.06)}.article section>p:last-child{margin-bottom:0}.article h2{font-size:clamp(1.72rem,4vw,2.35rem)}.article h3{font-family:"Noto Sans SC",sans-serif;letter-spacing:-.02em}.article p,.article li{color:#4f5e56}.article ul,.article ol{padding-left:22px}.article li+li{margin-top:8px}.emergency{background:#fff9f7!important;border-color:#eedbd5!important}.emergency .eyebrow{color:var(--alert)}.emergency strong{color:var(--alert)}
.situation-tabs{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin:22px 0}.situation-tab{border:1px solid var(--line);border-radius:16px;padding:14px;background:#fff;color:var(--ink);text-align:left;font-weight:800;cursor:pointer}.situation-tab.active{border-color:var(--green);background:var(--green-soft);color:var(--green-dark)}.situation-panel{padding:22px;border-radius:18px;background:var(--surface-soft)}.situation-panel[hidden]{display:none}.situation-panel h3{margin-bottom:10px}.situation-panel ol{margin-bottom:0}
.check-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;list-style:none!important;padding:0!important}.check-grid li{position:relative;margin:0!important;padding:14px 14px 14px 42px;border-radius:15px;background:var(--surface-soft)}.check-grid li::before{content:"✓";position:absolute;left:15px;color:var(--green);font-weight:900}
.note{padding:17px 18px;border-radius:16px;background:var(--warm);color:#694e3e!important;font-size:.92rem}.reviewer{display:grid;grid-template-columns:92px 1fr;gap:20px;align-items:center;background:linear-gradient(145deg,#f8fbf9,#e7f1ed)!important}.reviewer img{width:92px;height:92px;object-fit:cover;object-position:center top;border-radius:50%}.reviewer h2{font-size:1.7rem;margin-bottom:5px}.reviewer p{margin:4px 0}.reviewer-actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:15px}.button{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:0 18px;border-radius:999px;background:var(--green);color:#fff;font-weight:850}.button.secondary{background:#fff;color:var(--green-dark);border:1px solid var(--line)}
.sources{font-size:.86rem}.sources a{color:var(--green);text-decoration:underline;text-underline-offset:3px}.sources li{overflow-wrap:anywhere}
.side-nav{position:sticky;top:98px;padding:20px;background:rgba(255,255,255,.86);border:1px solid var(--line);border-radius:20px;backdrop-filter:blur(12px)}.side-nav strong{display:block;margin-bottom:11px}.side-nav a{display:block;padding:8px 0;color:var(--muted);font-size:.86rem}.side-nav a:hover{color:var(--green)}
.site-footer{padding:46px 0 96px;background:#14201a;color:#fff}.footer-inner{display:flex;justify-content:space-between;gap:26px;flex-wrap:wrap}.footer-inner p{max-width:600px;margin:6px 0 0;color:#adbbb4}.footer-links{display:flex;gap:18px;flex-wrap:wrap;color:#d3ddd7;font-size:.87rem}
.mobile-bar{display:none;position:fixed;z-index:70;left:8px;right:8px;bottom:max(8px,env(safe-area-inset-bottom));grid-template-columns:.8fr 1.2fr;gap:5px;padding:5px;background:rgba(255,255,255,.94);border:1px solid rgba(255,255,255,.84);border-radius:20px;box-shadow:0 18px 50px rgba(20,49,39,.24);backdrop-filter:blur(18px)}.mobile-bar a{min-height:56px;display:grid;place-items:center;border-radius:15px;font-size:.82rem;font-weight:850}.mobile-bar .primary{background:var(--green);color:#fff}.mobile-bar .secondary{background:#f0f4f1;color:var(--green-dark)}
@media(max-width:820px){.guide-grid,.article-layout{grid-template-columns:1fr}.side-nav{display:none}.article-hero{padding-top:46px}.article section{padding:27px}.mobile-bar{display:grid}.site-footer{padding-bottom:105px}}
@media(max-width:580px){.wrap{width:min(calc(100% - 22px),var(--max))}.topbar{width:calc(100% - 18px);top:8px;margin-top:8px}.brand small{max-width:130px;overflow:hidden;text-overflow:ellipsis}.top-link{display:none}.hero{padding:48px 0 32px}.guide-grid{padding-bottom:70px}.guide-card{min-height:300px;padding:24px}.article-hero{padding:38px 0 27px}.article section{padding:23px 19px;border-radius:20px}.situation-tabs,.check-grid{grid-template-columns:1fr}.reviewer{grid-template-columns:68px 1fr}.reviewer img{width:68px;height:68px}.reviewer-actions{grid-column:1/-1}.reviewer-actions .button{width:100%}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}

/* Reviewer action alignment: keep controls out of the portrait column. */
@media(min-width:581px){.reviewer-actions{grid-column:2}.reviewer-actions .button{white-space:nowrap}}

/* Article 02: side-by-side cost comparison */
.answer-card{background:linear-gradient(145deg,#f8fbf9,#edf4f0)!important;border-color:#ccded7!important}
.three-costs{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}.three-costs article{padding:19px;border:1px solid var(--line);border-radius:18px;background:var(--surface-soft)}.three-costs article>span{width:36px;height:36px;display:grid;place-items:center;margin-bottom:15px;border-radius:12px;background:var(--green);color:#fff;font-weight:900}.three-costs h3{font-size:1.08rem}.three-costs p{font-size:.9rem;margin-bottom:0}
.comparison-scroll{overflow-x:auto;border:1px solid var(--line);border-radius:18px}.cost-table{width:100%;min-width:680px;border-collapse:collapse;background:#fff}.cost-table th,.cost-table td{padding:16px;text-align:left;vertical-align:top;border-bottom:1px solid var(--line)}.cost-table thead th{background:var(--green-dark);color:#fff}.cost-table tbody th{width:18%;color:var(--ink);background:#f4f7f5}.cost-table tbody td{width:41%;color:#526159}.cost-table tr:last-child th,.cost-table tr:last-child td{border-bottom:0}
.cost-shared{margin:22px 0;padding:18px;border-radius:18px;background:var(--warm)}.cost-columns{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.cost-columns fieldset{min-width:0;margin:0;padding:20px;border:1px solid var(--line);border-radius:19px}.cost-columns legend{padding:0 8px;font-family:"Noto Serif SC",serif;font-size:1.35rem;font-weight:700}.cost-shared label,.cost-columns label{display:grid;gap:7px;margin-bottom:13px;color:var(--muted);font-size:.86rem;font-weight:700}.cost-columns label:last-child{margin-bottom:0}.cost-shared input,.cost-columns input{width:100%;min-height:47px;padding:10px 12px;border:1px solid #ccd7d1;border-radius:12px;background:#fff;color:var(--ink);font:inherit}.cost-shared input:focus,.cost-columns input:focus{outline:0;border-color:var(--green);box-shadow:0 0 0 4px rgba(11,117,107,.11)}.cost-results{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin-top:16px}.cost-results div{padding:19px;border-radius:17px;background:var(--green-dark);color:#fff}.cost-results span,.cost-results strong{display:block}.cost-results span{font-size:.8rem;opacity:.75}.cost-results strong{margin-top:3px;font-size:1.75rem}.calculator-reset{margin-top:13px;border:1px solid var(--line);border-radius:999px;padding:10px 15px;background:#fff;color:var(--green-dark);font-weight:800;cursor:pointer}
.fit-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:13px}.fit-grid article{padding:21px;border-radius:18px;background:var(--surface-soft)}.fit-grid ul{margin-bottom:0}
@media(max-width:700px){.three-costs,.cost-columns,.cost-results,.fit-grid{grid-template-columns:1fr}.cost-results strong{font-size:1.5rem}}