*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:#fff;color:#333;font:16px/1.8 system-ui,"PingFang SC","Microsoft YaHei",sans-serif}a{color:inherit;text-decoration:none}a:hover{color:#f45132}button{font:inherit;cursor:pointer}img{display:block;max-width:100%}.container{width:min(100% - 48px,1160px);margin-inline:auto}.site-header{background:#fff;border-bottom:1px solid #eceef0}.nav-inner{height:70px;display:flex;align-items:center;gap:18px}.menu-toggle{width:42px;height:42px;flex:none;background:none;border:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:5px}.menu-toggle span{display:block;width:21px;height:2px;background:#333}.brand{display:flex;align-items:center;gap:8px;white-space:nowrap}.brand .media{width:38px;height:38px;aspect-ratio:1/1;background:transparent}.brand-text{font-size:21px;color:#1a1a1a;line-height:1.05}.brand-text span{color:#f45132}.brand-text small{display:block;font-size:9px;letter-spacing:1.5px;color:#999}.desktop-nav{display:flex;align-self:stretch;align-items:center;gap:25px;margin-left:24px;min-width:0}.desktop-nav a{height:100%;display:flex;align-items:center;font-size:15px;white-space:nowrap;border-bottom:2px solid transparent}.desktop-nav .current{border-color:#f45132;color:#f45132}.main-btn{display:inline-flex;align-items:center;justify-content:center;min-width:78px;height:40px;padding:0 20px;border-radius:999px;background:#f45132;color:white!important;font-weight:700;white-space:nowrap;margin-left:auto}.main-btn:hover{background:#ff684e}.topic-strip{background:#f6f7f9;border-bottom:1px solid #eee}.topic-scroll{display:flex;gap:0;overflow-x:auto;scrollbar-width:thin;white-space:nowrap;align-items:center;min-height:44px}.topic-scroll a{font-size:13px;padding:0 15px;color:#666;border-right:1px solid #dedfe2}.topic-scroll a:first-child{padding-left:0}.topic-scroll a.current,.topic-scroll a:hover{color:#f45132}.mobile-drawer{position:fixed;inset:0 auto 0 0;width:360px;max-width:84vw;height:100dvh;overflow-y:auto;background:#fff;z-index:12000;transform:translateX(-105%);visibility:hidden;pointer-events:none;transition:transform .2s ease,visibility .2s}.mobile-drawer.is-open{transform:translateX(0);visibility:visible;pointer-events:auto}.drawer-mask{display:none;position:fixed;inset:0;background:rgba(0,0,0,.38);z-index:11000;opacity:0;pointer-events:none}.drawer-mask.is-visible{display:block;opacity:1;pointer-events:auto}body.drawer-open{overflow:hidden}.drawer-top{display:flex;align-items:center;justify-content:space-between;padding:15px 20px;border-bottom:1px solid #ececec}.drawer-close{border:0;background:transparent;font-size:32px;line-height:1}.drawer-group{padding:12px 20px;border-bottom:1px solid #eee}.drawer-group h2{font-size:15px;color:#999;margin:4px 0 6px}.drawer-group a{display:block;min-height:41px;padding:5px 0;font-size:15px}.drawer-group a.current{color:#f45132}main{padding-block:34px 50px}.page-head{margin-bottom:26px;border-bottom:1px solid #eee;padding-bottom:22px}.eyebrow{font-size:13px;color:#f45132;font-weight:700;letter-spacing:.08em}h1,h2,h3{color:#1a1a1a;line-height:1.4}h1{font-size:32px;margin:10px 0 14px}h2{font-size:24px;margin:0 0 15px}h3{font-size:19px;margin:0 0 9px}p{margin:0 0 16px}.lead{font-size:17px;color:#555;max-width:850px}.section{margin-top:40px}.section-title{display:flex;align-items:center;justify-content:space-between;gap:15px;border-bottom:1px solid #e9eaec;padding-bottom:12px}.section-title h2{margin:0}.section-title a,.read-more{font-size:14px;color:#f45132;font-weight:600}.hero-grid,.two-column{display:grid;grid-template-columns:1.35fr 1fr;gap:24px;align-items:start}.hero-grid{grid-template-columns:58fr 42fr}.hero-side article{border-bottom:1px solid #eee;padding:10px 0 14px}.hero-side article:first-child{padding-top:0}.hero-side h3{font-size:18px}.media{display:flex;align-items:center;justify-content:center;width:100%;max-width:100%;min-width:0;overflow:hidden;border-radius:12px;background:#f6f7f9}.media img{display:block;width:auto;height:auto;max-width:100%;max-height:100%;object-fit:contain;object-position:center}.media-wide{aspect-ratio:16/9}.media-banner{aspect-ratio:16/7}.media-square{aspect-ratio:1/1}.media-portrait{aspect-ratio:3/4}.media-device{aspect-ratio:9/16}.media-natural img{width:100%;height:auto;max-height:280px;object-fit:contain;margin:0 auto}.media-placeholder{background:#f6f7f9}.hero-media{max-height:290px}.hero-media img{max-height:290px}.quick-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}.quick-item{border:1px solid #e9ebee;padding:16px;border-radius:12px;min-width:0}.quick-item strong{color:#1a1a1a;display:block;margin-bottom:5px}.quick-item p{font-size:14px;color:#666;margin:0}.section-copy{max-width:820px}.body-article{max-width:820px}.body-article section{margin:0 0 34px}.body-article section h2{padding-left:15px;border-left:3px solid #f45132;font-size:23px}.body-article p{line-height:1.85}.mini-links,.related-links{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}.mini-links a,.related-links a{padding:7px 15px;border-radius:99px;background:#f6f7f9;font-size:14px}.media-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}.media-grid.two{grid-template-columns:repeat(2,minmax(0,1fr))}.media-card{border:1px solid #eceef0;border-radius:13px;padding:10px;min-width:0}.media-card h3{font-size:16px;margin:12px 2px 7px}.media-card p{font-size:13px;color:#666;margin:0 2px 7px;line-height:1.6}.media-card .media{max-height:185px}.media-card .media img{max-height:185px}.media-card .media-square{aspect-ratio:1.2/1}.numbered-list{counter-reset:reading}.numbered-list .numbered-item{display:flex;gap:15px;border-bottom:1px solid #e8e8e8;padding:15px 0}.numbered-item:before{counter-increment:reading;content:counter(reading,decimal-leading-zero);font-size:22px;color:#d7a84b;font-weight:bold}.numbered-item h3{margin:0 0 5px}.numbered-item p{font-size:14px;color:#666}.faq-item{border-bottom:1px solid #e8e8e8;padding:18px 0}.faq-item h2{font-size:19px}.faq-item p{max-width:820px}.site-footer{background:#1a1a1a;color:#f5f5f5;padding:42px 0 16px}.footer-grid{display:grid;grid-template-columns:2fr repeat(3,1fr);gap:32px}.site-footer h2{font-size:16px;color:white}.site-footer a:not(.footer-brand){display:block;font-size:14px;color:#ddd;margin:4px 0}.site-footer a:hover{color:#ff684e}.footer-brand{font-size:23px;font-weight:bold;color:white}.footer-brand small{display:block;font-size:10px;letter-spacing:2px;color:#d7a84b}.footer-grid p{font-size:14px;color:#bbb;max-width:290px}.footer-bottom{border-top:1px solid #333;margin-top:28px;padding-top:15px;display:flex;justify-content:space-between;gap:20px;font-size:12px;color:#aaa}.footer-bottom p{margin:0}.bottom-nav{display:none}.to-top{position:fixed;right:18px;bottom:22px;border:1px solid #eee;background:#fff;border-radius:50%;height:40px;width:40px;box-shadow:0 3px 14px #0001;opacity:0;pointer-events:none;transition:opacity .2s}.to-top.visible{opacity:1;pointer-events:auto}.notice{background:#f6f7f9;border-left:3px solid #d7a84b;padding:16px 20px;font-size:14px;margin-top:20px}.page-layout{display:grid;grid-template-columns:minmax(0,820px) minmax(220px,1fr);gap:36px}.sidepanel{background:#f6f7f9;padding:18px;border-radius:12px;align-self:start}.sidepanel h2{font-size:18px}.sidepanel a{display:block;padding:9px 0;border-bottom:1px solid #e6e6e6;font-size:14px}.image-pair{display:grid;grid-template-columns:1.3fr 1fr;gap:22px;align-items:center}@media(max-width:980px){.desktop-nav{display:none}.nav-inner{height:58px;justify-content:space-between}.brand{position:absolute;left:50%;transform:translateX(-50%)}.brand .media{width:30px;height:30px}.brand-text{font-size:18px}.main-btn{height:36px;min-width:72px;padding:0 14px}.container{width:calc(100% - 40px)}.bottom-nav{display:flex;position:fixed;bottom:0;left:0;right:0;background:#fff;border-top:1px solid #eee;min-height:60px;padding-bottom:env(safe-area-inset-bottom);z-index:100;justify-content:space-around;align-items:center}.bottom-nav a{flex:1;text-align:center;font-size:14px}.site-footer{padding-bottom:calc(86px + env(safe-area-inset-bottom))}.to-top{bottom:80px}.footer-grid{grid-template-columns:repeat(2,1fr)}}@media(max-width:700px){.container{width:calc(100% - 32px)}main{padding-block:24px 36px}h1{font-size:26px}h2{font-size:21px}h3{font-size:17px}.lead{font-size:15px}.hero-grid,.two-column,.page-layout,.image-pair{grid-template-columns:1fr}.section{margin-top:29px}.quick-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.quick-item{padding:12px}.media-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.media-grid.two{grid-template-columns:1fr}.media-card{padding:8px}.media-card .media,.media-card .media img{max-height:150px}.hero-media,.hero-media img{max-height:195px}.footer-grid{gap:22px}.footer-bottom{display:block}.brand-text small{font-size:8px}.topic-scroll a{padding-inline:12px}.body-article section h2{font-size:20px}}@media(max-width:360px){.brand{gap:4px}.brand-text{font-size:16px}.brand .media{width:27px;height:27px}.main-btn{min-width:72px;padding:0 10px}.quick-grid{grid-template-columns:1fr 1fr}}