:root{--paper:#f7f6f0;--paper-2:#eeefe8;--white:#fffefa;--ink:#173d39;--muted:#5d716a;--teal:#238c86;--line:#d4ddd6;--terra:#b9694c;--serif:"Noto Serif SC","Songti SC","SimSun",serif;--sans:"Noto Sans SC","Microsoft YaHei",Arial,sans}
.icon{width:1.25em;height:1.25em;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round;vertical-align:-.25em;flex:none}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font:16px/1.75 var(--sans)}img{max-width:100%;display:block}a{color:inherit;text-decoration:none}button{font:inherit}p{margin:.5em 0 1.1em}h1,h2,h3{line-height:1.35;margin:0 0 .55em;font-family:var(--serif);font-weight:600;letter-spacing:-.035em}h1{font-size:clamp(2.25rem,4.4vw,4.35rem)}h2{font-size:clamp(1.7rem,3vw,2.7rem)}h3{font-size:clamp(1.15rem,1.7vw,1.55rem)}ul,ol{padding-left:1.3em}li{margin:.35em 0}.wrap{width:min(100% - 48px,1240px);margin-inline:auto}.eyebrow,.kicker{font-size:.73rem;font-weight:800;letter-spacing:.16em;color:var(--teal);text-transform:uppercase}.small{font-size:.9rem;color:var(--muted)}.lead{font-size:1.12rem;color:#35544e;max-width:68ch}.muted{color:var(--muted)}.rule{border:0;border-top:1px solid var(--line);margin:0}.section{padding:88px 0;border-top:1px solid var(--line)}.section-soft{background:var(--paper-2)}.section-head{display:flex;align-items:end;justify-content:space-between;gap:24px;margin-bottom:34px}.section-head p{max-width:56ch}.text-link{color:var(--teal);font-weight:700;display:inline-flex;align-items:center;gap:.5em}.text-link::after{content:'↗';font-size:1.05em}.text-link:hover,.nav a:hover,.footer a:hover{color:var(--terra)}.button{display:inline-flex;align-items:center;justify-content:center;gap:10px;padding:12px 20px;border:1px solid var(--ink);border-radius:5px;background:var(--ink);color:white;font-weight:700;line-height:1.4;transition:transform .2s,background .2s}.button:hover{transform:translateY(-2px);background:#24544f}.button.secondary{background:transparent;color:var(--ink)}.button.secondary:hover{background:#e7eee9}.chip{display:inline-block;border:1px solid var(--line);border-radius:99px;padding:3px 10px;font-size:.78rem;color:var(--muted)}
.site-header{background:var(--paper);border-bottom:1px solid var(--line);position:relative;z-index:20}.header-inner{min-height:84px;display:flex;align-items:center;justify-content:space-between;gap:32px}.brand{display:inline-flex;align-items:center;gap:12px;min-width:0}.brand img{width:46px;height:46px}.brand-text{font-weight:800;font-size:1.07rem;letter-spacing:.02em;white-space:nowrap}.brand-sub{display:block;font-size:.7rem;color:var(--muted);font-weight:600;letter-spacing:.14em;line-height:1.3}.nav{display:flex;align-items:center;gap:clamp(12px,2.2vw,29px)}.nav a{font-size:.88rem;font-weight:700;white-space:nowrap}.nav a[aria-current=page]{color:var(--teal)}.menu-toggle{display:none;background:none;border:1px solid var(--line);border-radius:4px;padding:6px 10px;color:var(--ink)}.header-note{font-size:.7rem;color:var(--muted);border-left:1px solid var(--line);padding-left:18px;line-height:1.4;white-space:nowrap}
.hero{padding:50px 0 58px}.hero-top{display:grid;grid-template-columns:1.95fr .95fr;gap:6%;align-items:end;margin-bottom:38px}.hero-top h1{max-width:15ch;margin-top:14px}.hero-copy{max-width:72ch}.hero-copy p{margin-bottom:10px}.hero-actions{border-left:1px solid var(--line);padding-left:30px}.hero-actions .button{width:100%;margin-bottom:10px}.hero-bottom{display:grid;grid-template-columns:1.62fr 1fr;gap:24px}.hero-image{width:100%;height:334px;object-fit:cover;border-radius:6px}.hero-routes{border-top:2px solid var(--ink);display:flex;flex-direction:column;justify-content:space-between}.hero-route{padding:14px 0;border-bottom:1px solid var(--line);display:grid;grid-template-columns:26px 1fr;gap:14px}.hero-route strong{display:block;line-height:1.45}.hero-route p{font-size:.82rem;color:var(--muted);margin:2px 0 0}.hero-route .num{font-size:.75rem;color:var(--teal);font-weight:800}.hero-route a:hover strong{color:var(--teal)}
.two-path{display:grid;grid-template-columns:1fr 1fr;gap:26px}.path{padding:28px;border:1px solid var(--line);background:var(--white);min-height:220px;display:flex;flex-direction:column}.path .text-link{margin-top:auto}.path-num{font:700 .8rem var(--sans);color:var(--terra);margin-bottom:22px}.split{display:grid;grid-template-columns:1fr 1fr;gap:6%;align-items:center}.split.reverse .media{order:2}.split .media img,.feature-image{width:100%;height:auto;border-radius:5px}.content-stack>*+*{margin-top:16px}.check-list{list-style:none;padding:0}.check-list li{border-top:1px solid var(--line);padding:10px 0 10px 30px;position:relative;margin:0}.check-list li::before{content:'✓';color:var(--teal);position:absolute;left:3px;font-weight:800}.device-section .media img{max-height:500px;object-fit:contain;object-position:center}.device-section.portrait .media{display:flex;justify-content:center}.device-section.portrait .media img{max-width:440px}.number-row{display:grid;grid-template-columns:70px 1fr;gap:20px;border-top:1px solid var(--line);padding:22px 0}.number-row .index{color:var(--teal);font-weight:800}.number-row h3{margin-bottom:5px}.number-row p{margin:0;color:var(--muted)}.tool-grid{display:grid;grid-template-columns:1fr 1fr;gap:0 50px}.tool-grid .number-row{grid-template-columns:48px 1fr}.photo-caption{font-size:.8rem;color:var(--muted);margin-top:9px}
.news-list{border-top:2px solid var(--ink)}.news-item{display:grid;grid-template-columns:10% 34% 27% 1fr;gap:18px;align-items:start;padding:20px 0;border-bottom:1px solid var(--line)}.news-item .news-id{font-size:.78rem;font-weight:800;color:var(--teal)}.news-item h3{font-family:var(--sans);font-size:1.17rem;letter-spacing:0}.news-item h3 a:hover{color:var(--teal)}.news-item img{width:100%;aspect-ratio:3/2;object-fit:cover;border-radius:3px}.news-item p{font-size:.85rem;line-height:1.6;color:var(--muted);margin:0 0 10px}.news-item .prompt{font-size:.82rem;color:var(--terra)}.news-item .text-link{font-size:.84rem}.faq-grid{display:grid;grid-template-columns:1fr 1fr;gap:0 40px}.faq-item{border-top:1px solid var(--line);padding:18px 0}.faq-item h3{font:700 1rem/1.5 var(--sans);letter-spacing:0;margin-bottom:6px}.faq-item p{font-size:.91rem;color:var(--muted);margin:0}.cta-panel{padding:38px 46px;background:var(--ink);color:#fff;border-radius:6px;display:flex;align-items:center;justify-content:space-between;gap:30px}.cta-panel h2{color:#fff;margin-bottom:.2em}.cta-panel p{color:#d2e0d9;margin:0}.cta-panel .button{background:#fff;color:var(--ink);border-color:#fff;white-space:nowrap}
.page-intro{padding:65px 0 46px;border-bottom:1px solid var(--line)}.page-intro h1{font-size:clamp(2rem,4vw,3.6rem);max-width:22ch}.page-intro .lead{margin-bottom:0}.breadcrumb{font-size:.78rem;color:var(--muted);margin-bottom:20px}.breadcrumb a:hover{color:var(--teal)}.page-body{padding:60px 0 100px}.reading{max-width:840px}.reading h2{font-size:1.65rem;margin:1.8em 0 .5em}.reading h3{font-family:var(--sans);font-size:1.15rem;letter-spacing:0;margin:1.5em 0 .4em}.reading p,.reading li{color:#3f5c55}.reading figure{margin:30px 0}.reading figure img{width:100%;height:auto;border-radius:4px}.reading figcaption{font-size:.8rem;color:var(--muted);margin-top:8px}.info-note{background:#e8efeb;border-left:3px solid var(--teal);padding:15px 20px;margin:20px 0;color:#31534b}.anchor-nav{display:flex;flex-wrap:wrap;gap:9px;margin-top:24px}.anchor-nav a{padding:7px 14px;border:1px solid var(--line);border-radius:99px;font-size:.85rem;background:#fff}.anchor-nav a:hover{border-color:var(--teal);color:var(--teal)}.download-chapter{padding:65px 0;border-bottom:1px solid var(--line);scroll-margin-top:20px}.download-chapter .split{align-items:start}.download-chapter .media img{max-height:490px;object-fit:contain}.resource-links{border-top:1px solid var(--line);padding-top:35px;margin-top:65px}.resource-links ul{display:flex;flex-wrap:wrap;gap:8px 20px;padding:0;list-style:none}.resource-links li{margin:0}.resource-links a{text-decoration:underline;text-underline-offset:3px;color:var(--teal);font-size:.9rem}.article-meta{font-size:.82rem;color:var(--muted);margin-bottom:20px}.article-nav{display:flex;justify-content:space-between;gap:30px;border-top:1px solid var(--line);padding-top:22px;margin-top:44px}.article-nav a{font-weight:700;color:var(--teal)}.article-related{background:var(--paper-2);padding:25px;margin-top:36px}.article-related a{display:block;color:var(--teal);margin:8px 0}.compact-index{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}.compact-index article{border-top:1px solid var(--line);padding-top:18px}.compact-index img{width:100%;aspect-ratio:3/2;object-fit:cover;margin:15px 0}.compact-index h2{font:700 1.2rem/1.45 var(--sans);letter-spacing:0}.compact-index p{font-size:.88rem;color:var(--muted)}
.site-footer{background:#e7ebe5;border-top:1px solid var(--line);padding:45px 0 28px}.footer-top{display:grid;grid-template-columns:1.3fr 1fr 1fr;gap:45px;padding-bottom:35px}.footer-top h3{font:800 .86rem var(--sans);letter-spacing:0}.footer a{display:inline-block;margin:5px 12px 5px 0;font-size:.84rem;color:#3a5d55}.footer-bottom{border-top:1px solid #c8d2ca;padding-top:20px;font-size:.78rem;color:var(--muted);display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap}.footer-bottom a{margin:0;font-size:inherit}
@media(max-width:1050px){.header-note{display:none}.news-item{grid-template-columns:9% 33% 26% 1fr;gap:12px}.nav{gap:13px}.nav a{font-size:.82rem}}
@media(max-width:800px){.menu-toggle{display:block}.nav{display:none;position:absolute;top:100%;left:0;right:0;background:var(--paper);padding:16px 24px 22px;box-shadow:0 12px 20px #173d3920;flex-direction:column;align-items:stretch;gap:0}.nav.is-open{display:flex}.nav a{padding:10px 0;border-bottom:1px solid var(--line)}.hero-top,.hero-bottom,.split,.two-path{grid-template-columns:1fr}.hero-actions{border-left:0;padding:0;max-width:450px}.hero-top{gap:18px}.hero-bottom{gap:22px}.hero-image{height:auto;aspect-ratio:16/9}.hero-routes{display:grid;grid-template-columns:repeat(3,1fr);gap:15px}.hero-route{border-bottom:0;display:block}.split.reverse .media{order:0}.section{padding:65px 0}.news-item{grid-template-columns:75px 1fr 180px;gap:15px}.news-item .summary{grid-column:2/4}.footer-top{grid-template-columns:1fr 1fr}.footer-top>div:first-child{grid-column:1/-1}}
@media(max-width:600px){body{font-size:15px}.wrap{width:min(100% - 32px,1240px)}.header-inner{min-height:68px}.brand img{width:38px;height:38px}.brand-text{font-size:.91rem}.brand-sub{font-size:.61rem}.hero{padding:36px 0 44px}.hero-top h1{font-size:2.25rem}.hero-routes{display:block}.hero-route{display:grid;grid-template-columns:26px 1fr;border-bottom:1px solid var(--line)}.section,.page-body{padding:48px 0}.section-head{display:block}.section-head .text-link{margin-top:12px}.path{min-height:0}.news-item{display:block;padding:22px 0}.news-item .news-id{display:block;margin-bottom:9px}.news-item img{margin:12px 0}.news-item .summary{display:block}.faq-grid,.tool-grid,.compact-index{grid-template-columns:1fr}.cta-panel{display:block;padding:30px}.cta-panel .button{margin-top:18px}.page-intro{padding:42px 0 36px}.article-nav{display:block}.article-nav a{display:block;margin:8px 0}.footer-top{grid-template-columns:1fr;gap:15px}.footer-top>div:first-child{grid-column:auto}.footer-bottom{display:block}.footer-bottom>*{display:block;margin-bottom:6px}.download-chapter{padding:45px 0}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.button{transition:none}}

/* Keep each photograph in its own content group and show the whole frame. */
.hero-bottom>div:first-child{min-width:0}
.hero-bottom>div:first-child img{display:block;width:100%;height:clamp(280px,28vw,350px);object-fit:contain;background:#e8ebe5;border:1px solid var(--line);border-radius:6px}
.split{grid-template-columns:minmax(0,1fr) minmax(0,1fr)}
.split>*{min-width:0}
.split .media{min-width:0;display:flex;align-items:center;justify-content:center;padding:14px;background:#eaeee8;border:1px solid var(--line);border-radius:6px}
.split .media img,.split .media .feature-image{display:block;width:auto;max-width:100%;height:auto;max-height:430px;object-fit:contain;border-radius:3px}
.device-section .media img{width:auto;max-width:100%;height:auto;max-height:430px;object-fit:contain}
.device-section.portrait .media img{width:auto;max-width:100%;max-height:480px}
.download-chapter .split{align-items:start}
.download-chapter .media img{width:auto;max-width:100%;height:auto;max-height:430px;object-fit:contain}
.news-item{grid-template-columns:minmax(80px,10%) minmax(0,34%) minmax(0,27%) minmax(0,1fr)}
.news-item>a[aria-label]{display:block;min-width:0}
.news-item img{display:block;width:100%;height:auto;aspect-ratio:3/2;object-fit:contain;background:#eaeee8}
.reading figure{max-width:720px;margin:30px auto}
.reading figure img{width:100%;height:auto;object-fit:contain}
@media(max-width:1050px){.news-item{grid-template-columns:minmax(60px,9%) minmax(0,33%) minmax(0,26%) minmax(0,1fr)}}
@media(max-width:800px){.split{grid-template-columns:1fr}.split .media{width:100%;padding:12px}.split .media img{max-height:420px}.news-item{grid-template-columns:75px minmax(0,1fr) 180px}.hero-bottom>div:first-child img{height:min(46vw,350px)}}
@media(max-width:600px){.hero-bottom>div:first-child img{height:auto;aspect-ratio:16/9}.split .media{padding:8px}.split .media img,.device-section .media img,.device-section.portrait .media img,.download-chapter .media img{width:auto;max-width:100%;height:auto;max-height:none}.news-item{display:block}.news-item img{width:100%;height:auto}.reading figure{margin:24px 0}}