:root{--ink:#13213b;--muted:#64748b;--line:#dfe7f1;--blue:#1767e8;--blue-dark:#0c47aa;--blue-soft:#eef5ff;--green:#11875d;--orange:#e36a19;--surface:#fff;--soft:#f6f9fd;--radius:20px;--shadow:0 20px 55px rgba(20,46,86,.1);--shell:1180px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--ink);background:#fff;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;font-size:16px;line-height:1.75;-webkit-font-smoothing:antialiased}img{max-width:100%;height:auto}a{color:var(--blue);text-decoration:none}a:hover{color:var(--blue-dark)}button,input{font:inherit}.shell{width:min(calc(100% - 40px),var(--shell));margin-inline:auto}.screen-reader-text,.skip-link{position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.skip-link:focus{clip:auto;width:auto;height:auto;margin:12px;padding:10px 16px;z-index:9999;background:#fff}.site-header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.94);border-bottom:1px solid rgba(223,231,241,.85);backdrop-filter:blur(18px)}.admin-bar .site-header{top:32px}.header-inner{height:76px;display:flex;align-items:center;gap:28px}.brand{display:flex;align-items:center;gap:11px;color:var(--ink);margin-right:auto}.brand:hover{color:var(--ink)}.brand-mark{display:grid;place-items:center;width:40px;height:40px;color:#fff;background:linear-gradient(145deg,#2f84ff,#0e55c9);font-weight:800;font-size:22px;border-radius:12px;box-shadow:0 8px 18px rgba(23,103,232,.25)}.brand strong,.brand small{display:block}.brand strong{font-size:17px;line-height:1.25}.brand small{font-size:11px;color:var(--muted);margin-top:2px}.primary-nav ul{display:flex;list-style:none;margin:0;padding:0;gap:28px}.primary-nav a{color:#334155;font-weight:650;font-size:15px}.primary-nav a:hover{color:var(--blue)}.search-toggle,.menu-toggle{border:0;background:var(--soft);color:var(--ink);border-radius:12px;cursor:pointer}.search-toggle{width:42px;height:42px;font-size:27px;line-height:1}.menu-toggle{display:none;padding:10px}.menu-toggle span:not(.screen-reader-text){display:block;width:22px;height:2px;background:var(--ink);margin:4px}.header-search{padding:18px 0;border-top:1px solid var(--line);background:#fff}.search-form,.hero-search,.cta form{display:flex;gap:10px}.search-form input,.hero-search input,.cta input{min-width:0;flex:1;border:1px solid var(--line);background:#fff;border-radius:13px;padding:13px 16px;color:var(--ink);outline:none}.search-form input:focus,.hero-search input:focus,.cta input:focus{border-color:var(--blue);box-shadow:0 0 0 3px rgba(23,103,232,.12)}.search-form button,.hero-search button,.cta button{border:0;border-radius:13px;padding:12px 22px;background:var(--blue);color:#fff;font-weight:700;cursor:pointer}.hero{overflow:hidden;padding:74px 0 70px;background:radial-gradient(circle at 10% 10%,#e9f4ff 0,transparent 35%),radial-gradient(circle at 90% 20%,#edf5ff 0,transparent 27%),linear-gradient(180deg,#fbfdff,#f5f9ff);border-bottom:1px solid var(--line)}.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:70px;align-items:center}.hero-kicker,.section-heading span,.archive-header>span,.article-kicker,.sources-card>span,.direct-answer>span,.product-hero .hero-kicker,.info-card>span,.cta span{display:block;color:var(--blue);font-size:13px;font-weight:800;letter-spacing:.12em;text-transform:uppercase}.hero h1{font-size:clamp(42px,5vw,66px);line-height:1.14;letter-spacing:-.045em;margin:15px 0 24px}.hero h1 em{font-style:normal;color:var(--blue)}.hero-copy>p{font-size:19px;line-height:1.8;color:#50627d;max-width:670px}.hero-search{margin-top:30px;padding:7px;background:#fff;border:1px solid var(--line);border-radius:17px;box-shadow:var(--shadow)}.hero-search input{border:0}.hero-trust{display:flex;flex-wrap:wrap;gap:19px;margin-top:22px;color:#52637b;font-size:13px}.hero-trust span::first-letter{color:var(--green)}.hero-panel{background:rgba(255,255,255,.92);padding:18px;border:1px solid rgba(204,218,236,.85);border-radius:26px;box-shadow:0 28px 70px rgba(27,68,127,.14)}.hero-panel__top{padding:12px 10px 16px}.hero-panel__top span{display:block;color:var(--muted);font-size:12px}.hero-panel__top strong{font-size:21px}.hero-panel>a{display:grid;grid-template-columns:52px 1fr auto;gap:14px;align-items:center;padding:15px 13px;border-top:1px solid var(--line);color:var(--ink);border-radius:14px;transition:.2s}.hero-panel>a:hover{background:var(--blue-soft);transform:translateX(3px)}.hero-panel a strong,.hero-panel a small{display:block}.hero-panel a small{color:var(--muted);font-size:12px}.hero-panel a b{color:var(--blue)}.task-icon{display:grid;place-items:center;width:48px;height:48px;border-radius:14px;background:#e7f0ff;color:var(--blue);font-weight:800}.task-icon--green{background:#e9f8f1;color:var(--green)}.task-icon--orange{background:#fff1e7;color:var(--orange);font-size:11px}.section{padding-top:85px;padding-bottom:85px}.section--tint{background:var(--soft);border-block:1px solid var(--line)}.section-heading{display:flex;justify-content:space-between;gap:25px;align-items:end;margin-bottom:32px}.section-heading h2{font-size:clamp(28px,3.2vw,42px);letter-spacing:-.025em;line-height:1.25;margin:7px 0 0}.text-link{font-weight:750}.tools-grid,.guides-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}.tool-card,.guide-card{overflow:hidden;border:1px solid var(--line);border-radius:var(--radius);background:#fff;box-shadow:0 8px 30px rgba(27,55,96,.055);transition:transform .25s,box-shadow .25s}.tool-card:hover,.guide-card:hover{transform:translateY(-5px);box-shadow:var(--shadow)}.tool-card__visual,.guide-card__image{display:block;aspect-ratio:16/10;background:var(--blue-soft);overflow:hidden}.tool-card__visual img,.guide-card__image img{width:100%;height:100%;object-fit:cover;transition:transform .35s}.tool-card:hover img,.guide-card:hover img{transform:scale(1.025)}.tool-card__placeholder{height:100%;display:grid;place-items:center;color:var(--blue);font-size:24px;font-weight:800}.tool-card__body,.guide-card__body{padding:24px}.eyebrow,.guide-card__meta{color:var(--muted);font-size:12px;font-weight:700}.tool-card h3,.guide-card h2{font-size:23px;line-height:1.35;margin:8px 0 10px}.tool-card h3 a,.guide-card h2 a{color:var(--ink)}.tool-card p,.guide-card p{color:var(--muted);margin:0 0 16px}.tool-card ul{list-style:none;padding:0;margin:0 0 18px;display:flex;flex-wrap:wrap;gap:7px}.tool-card li{font-size:12px;background:var(--soft);color:#475569;padding:5px 9px;border-radius:20px}.value-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}.value-grid article{background:#fff;border:1px solid var(--line);border-radius:18px;padding:27px}.value-grid b{color:#9bbbe8;font-size:15px}.value-grid h3{font-size:20px;margin:22px 0 8px}.value-grid p{margin:0;color:var(--muted);font-size:14px}.guide-card h2{font-size:20px}.cta{padding:55px 0;background:linear-gradient(135deg,#0e4fb6,#1577ed);color:#fff}.cta-inner{display:grid;grid-template-columns:1fr .8fr;gap:50px;align-items:center}.cta span{color:#bcd9ff}.cta h2{font-size:34px;line-height:1.25;margin:6px 0}.cta p{color:#d8e8ff;margin:0}.cta input{border-color:rgba(255,255,255,.3)}.cta button{background:#0b2d63}.site-footer{background:#0d172b;color:#b7c3d6;padding:62px 0 0}.footer-grid{display:grid;grid-template-columns:1.5fr .65fr .65fr;gap:70px}.brand--footer{color:#fff}.brand--footer:hover{color:#fff}.footer-grid>div:first-child p{max-width:520px}.footer-grid h2{font-size:15px;color:#fff;margin:0 0 15px}.footer-grid ul{list-style:none;padding:0;margin:0}.footer-grid li{margin:8px 0}.footer-grid a{color:#b7c3d6}.footer-grid a:hover{color:#fff}.footer-bottom{border-top:1px solid rgba(255,255,255,.1);margin-top:45px;padding:20px 0;display:flex;justify-content:space-between;gap:20px;font-size:12px}.breadcrumbs{display:flex;flex-wrap:wrap;gap:8px;color:#94a3b8;font-size:13px;padding:28px 0}.breadcrumbs a{color:#64748b}.archive-main{padding-bottom:85px}.archive-header{max-width:760px;padding:28px 0 48px}.archive-header h1{font-size:clamp(36px,5vw,58px);line-height:1.17;letter-spacing:-.035em;margin:9px 0 15px}.archive-header p,.archive-description{font-size:18px;color:var(--muted)}.tools-grid--archive{grid-template-columns:repeat(3,1fr)}.guides-grid--archive{grid-template-columns:repeat(3,1fr)}.navigation.pagination{margin-top:45px}.nav-links{display:flex;gap:8px}.page-numbers{padding:9px 14px;border:1px solid var(--line);border-radius:10px}.page-numbers.current{background:var(--blue);border-color:var(--blue);color:#fff}.empty-state{grid-column:1/-1;text-align:center;padding:60px;background:var(--soft);border-radius:var(--radius)}.empty-state .search-form{max-width:560px;margin:20px auto}.single-main{padding-bottom:90px}.article{max-width:100%}.article-header{max-width:900px;margin:35px auto 40px;text-align:center}.article-header h1{font-size:clamp(38px,5.2vw,64px);line-height:1.18;letter-spacing:-.04em;margin:13px 0 20px}.article-lead{font-size:19px;color:var(--muted);max-width:780px;margin:0 auto 20px}.article-meta{display:flex;justify-content:center;align-items:center;flex-wrap:wrap;gap:15px;color:#718096;font-size:13px}.verify-badge{padding:5px 10px;border-radius:20px;background:#fff4dc;color:#94610b;font-weight:800}.verify-badge--verified{background:#e8f7ef;color:#0d7951}.verify-badge--partial{background:#ebf3ff;color:#155ec6}.article-hero{max-width:1020px;margin:0 auto 55px}.article-hero img{width:100%;border-radius:24px;box-shadow:var(--shadow)}.article-layout{display:grid;grid-template-columns:210px minmax(0,780px);gap:50px;justify-content:center;align-items:start}.article-aside{position:sticky;top:108px}.toc-card{border-left:2px solid var(--line);padding-left:17px}.toc-card>strong{font-size:13px}.toc-card nav{display:flex;flex-direction:column;gap:8px;margin-top:12px}.toc-card a{font-size:12px;line-height:1.5;color:#64748b}.toc-card a.toc-h3{padding-left:10px}.toc-card a:hover,.toc-card a.is-active{color:var(--blue)}.direct-answer{position:relative;padding:25px 28px;margin-bottom:32px;background:linear-gradient(135deg,#eef6ff,#f7fbff);border:1px solid #cfe1fb;border-radius:18px}.direct-answer p{font-size:18px;line-height:1.8;margin:5px 0 0;font-weight:580}.copy-answer{position:absolute;right:16px;top:16px;border:1px solid #bfd7f7;background:#fff;color:var(--blue);font-size:11px;border-radius:8px;padding:5px 9px;cursor:pointer}.article-content{font-size:17px;line-height:1.92;color:#263852}.article-content>p:first-child strong:first-child{color:var(--blue)}.article-content h2{font-size:29px;line-height:1.4;letter-spacing:-.02em;margin:58px 0 18px;padding-top:4px}.article-content h3{font-size:21px;line-height:1.45;margin:34px 0 12px}.article-content p{margin:15px 0}.article-content ul,.article-content ol{padding-left:1.4em}.article-content li{margin:8px 0}.article-content table{width:100%;border-collapse:separate;border-spacing:0;margin:25px 0;border:1px solid var(--line);border-radius:14px;overflow:hidden;font-size:14px}.article-content th,.article-content td{text-align:left;padding:13px 15px;border-right:1px solid var(--line);border-bottom:1px solid var(--line);vertical-align:top}.article-content th{background:var(--blue-soft);color:#1c4f96}.article-content tr:last-child td{border-bottom:0}.article-content th:last-child,.article-content td:last-child{border-right:0}.article-content blockquote{margin:28px 0;padding:18px 22px;border-left:4px solid var(--blue);background:var(--soft);border-radius:0 13px 13px 0}.article-content figure{margin:30px 0}.article-content figure img{border-radius:16px}.article-content figcaption{text-align:center;color:var(--muted);font-size:12px}.pgc-related-products{margin-top:60px;padding-top:45px;border-top:1px solid var(--line)}.pgc-section-heading{margin-bottom:22px}.pgc-section-heading>span{color:var(--blue);font-weight:800;font-size:12px}.pgc-section-heading h2{font-size:28px;margin:5px 0}.pgc-section-heading p{color:var(--muted)}.pgc-product-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}.pgc-product-card{border:1px solid var(--line);border-radius:17px;overflow:hidden;background:#fff}.pgc-product-card__image{display:block;aspect-ratio:16/9;overflow:hidden;background:var(--soft)}.pgc-product-card__image img{width:100%;height:100%;object-fit:cover}.pgc-product-card__body{padding:19px}.pgc-product-card h3{font-size:19px;margin:0 0 6px}.pgc-product-card h3 a{color:var(--ink)}.pgc-product-card p{color:var(--muted);font-size:13px}.pgc-product-card ul{padding-left:18px;font-size:12px}.pgc-card-link{font-size:13px;font-weight:750}.sources-card{margin-top:55px;padding:26px;background:var(--soft);border:1px solid var(--line);border-radius:18px}.sources-card h2{font-size:24px;margin:5px 0}.sources-card p,.sources-card li{font-size:13px;color:#5d6d84}.post-nav{display:grid;grid-template-columns:1fr 1fr;gap:25px;max-width:1030px;margin:70px auto 0;border-top:1px solid var(--line);padding-top:25px}.post-nav>div:last-child{text-align:right}.post-nav span{display:block;color:var(--muted);font-size:12px}.post-nav a{color:var(--ink);font-weight:700}.product-main{padding-bottom:90px}.product-hero{display:grid;grid-template-columns:.9fr 1.1fr;gap:60px;align-items:center;padding:45px 0 60px}.product-hero__copy h1{font-size:clamp(42px,5vw,64px);line-height:1.15;letter-spacing:-.04em;margin:12px 0 20px}.product-hero__copy>p{font-size:20px;color:var(--muted)}.product-hero__image img{width:100%;border-radius:24px;box-shadow:var(--shadow)}.product-actions{display:flex;gap:10px;margin:26px 0}.button{display:inline-flex;align-items:center;justify-content:center;padding:12px 20px;border-radius:12px;font-weight:750}.button--primary{background:var(--blue);color:#fff}.button--primary:hover{background:var(--blue-dark);color:#fff}.button--secondary{border:1px solid var(--line);color:var(--ink)}.wechat-name{display:inline-flex;flex-direction:column;background:var(--soft);border:1px solid var(--line);border-radius:12px;padding:10px 15px}.wechat-name span{font-size:11px;color:var(--muted)}.wechat-name strong{font-size:15px}.product-facts{display:grid;grid-template-columns:repeat(3,1fr);border:1px solid var(--line);border-radius:18px;margin-bottom:70px;background:var(--soft)}.product-facts div{padding:22px 28px;border-right:1px solid var(--line)}.product-facts div:last-child{border:0}.product-facts span,.product-facts strong{display:block}.product-facts span{font-size:12px;color:var(--muted)}.product-facts strong{font-size:18px}.product-layout{display:grid;grid-template-columns:minmax(0,780px) 280px;gap:55px;align-items:start}.product-content section{margin-top:65px}.feature-list{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}.feature-list div{display:flex;align-items:center;gap:13px;padding:15px;border:1px solid var(--line);border-radius:13px}.feature-list b{color:#8faed9;font-size:12px}.steps-section ol{list-style:none;counter-reset:steps;padding:0}.steps-section li{counter-increment:steps;display:flex;align-items:center;min-height:62px;padding-left:62px;position:relative;border-left:1px solid var(--line);margin-left:20px}.steps-section li::before{content:counter(steps);position:absolute;left:-20px;display:grid;place-items:center;width:40px;height:40px;border-radius:50%;background:var(--blue);color:#fff;font-weight:800}.product-sidebar{position:sticky;top:110px}.info-card,.notice-card{padding:22px;border:1px solid var(--line);border-radius:17px;margin-bottom:17px}.info-card ul{padding:0;list-style:none}.info-card li{padding:9px 0;border-bottom:1px solid var(--line);font-size:14px}.info-card li::before{content:"✓";color:var(--green);font-weight:800;margin-right:8px}.notice-card{background:#fff9ed;border-color:#f2dfb7}.notice-card p{font-size:13px;color:#6d5a31;margin-bottom:0}.related-guides{margin-top:85px;padding-top:70px;border-top:1px solid var(--line)}.not-found{text-align:center;padding:120px 0}.not-found>span{color:#c6d5e9;font-size:90px;font-weight:900}.not-found h1{font-size:42px;margin:0}.not-found .search-form{max-width:620px;margin:25px auto}.not-found>.text-link{display:inline-block;margin-top:20px}@media(max-width:980px){.primary-nav{display:none;position:absolute;left:0;right:0;top:76px;background:#fff;border-bottom:1px solid var(--line);padding:20px}.primary-nav.is-open{display:block}.primary-nav ul{flex-direction:column;gap:13px}.menu-toggle{display:block}.hero-grid,.product-hero{grid-template-columns:1fr;gap:45px}.tools-grid,.guides-grid,.tools-grid--archive,.guides-grid--archive{grid-template-columns:repeat(2,1fr)}.value-grid{grid-template-columns:repeat(2,1fr)}.article-layout{grid-template-columns:1fr}.article-aside{display:none}.article-column{max-width:780px;margin:auto}.product-layout{grid-template-columns:1fr}.product-sidebar{position:static;display:grid;grid-template-columns:1fr 1fr;gap:15px}.footer-grid{grid-template-columns:1fr 1fr}.footer-grid>div:first-child{grid-column:1/-1}}@media(max-width:680px){.shell{width:min(calc(100% - 28px),var(--shell))}.admin-bar .site-header{top:46px}.header-inner{height:68px}.primary-nav{top:68px}.brand small{display:none}.search-toggle{display:none}.hero{padding:50px 0}.hero h1{font-size:39px}.hero-copy>p{font-size:16px}.hero-search{display:block}.hero-search button{width:100%;margin-top:5px}.hero-trust{gap:8px 14px}.section{padding-top:60px;padding-bottom:60px}.section-heading{align-items:start;flex-direction:column}.tools-grid,.guides-grid,.tools-grid--archive,.guides-grid--archive,.value-grid{grid-template-columns:1fr}.cta-inner{grid-template-columns:1fr;gap:28px}.cta form{display:block}.cta button{width:100%;margin-top:8px}.footer-grid{grid-template-columns:1fr;gap:30px}.footer-grid>div:first-child{grid-column:auto}.footer-bottom{flex-direction:column}.article-header{margin-top:10px}.article-header h1{font-size:36px}.article-lead{font-size:16px}.article-meta{gap:8px}.article-hero{margin-bottom:32px}.direct-answer{padding:48px 20px 20px}.article-content{font-size:16px}.article-content h2{font-size:25px;margin-top:45px}.article-content table{display:block;overflow-x:auto}.pgc-product-grid{grid-template-columns:1fr}.post-nav{grid-template-columns:1fr}.post-nav>div:last-child{text-align:left}.product-hero{padding-top:20px}.product-hero__copy h1{font-size:39px}.product-facts{grid-template-columns:1fr}.product-facts div{border-right:0;border-bottom:1px solid var(--line)}.feature-list{grid-template-columns:1fr}.product-sidebar{grid-template-columns:1fr}.product-actions{flex-direction:column}.button{width:100%}}

