*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:system-ui,"PingFang SC","Microsoft YaHei",sans-serif;color:#333;background:#fff;font-size:16px;line-height:1.8}a{color:inherit;text-decoration:none}a:hover{color:#f45132}button{font:inherit;cursor:pointer}img{max-width:100%}.container{width:min(100% - 48px,1160px);margin-inline:auto}.skip{position:absolute;top:-100px;left:10px;background:#fff;padding:8px;z-index:15000}.skip:focus{top:8px}.site-header{background:#fff;border-bottom:1px solid #eee}.top-inner{display:flex;align-items:center;gap:18px;height:70px}.menu-toggle{width:42px;height:42px;border:0;background:transparent;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:5px;flex-shrink:0}.menu-toggle span{display:block;width:21px;height:2px;background:#333}.brand{display:inline-flex;align-items:center;gap:9px;white-space:nowrap;min-width:0}.brand-text{font-size:20px;font-weight:800;color:#1a1a1a;line-height:1.1}.brand small{display:block;font-size:9px;color:#d7a84b;letter-spacing:2px;margin-top:4px}.media-logo{width:76px;height:37px;background:transparent!important;flex:none}.media-logo img{max-height:37px}.main-navigation{display:flex;align-items:center;gap:26px;margin-left:auto;white-space:nowrap}.main-navigation a{font-size:15px;line-height:68px;border-bottom:2px solid transparent}.main-navigation a[aria-current=page]{color:#f45132;border-bottom-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:#fff;font-weight:700;white-space:nowrap;margin-left:16px;flex:none}.main-btn:hover{background:#ff684e;color:#fff}.channel-bar{background:#f6f7f9;border-bottom:1px solid #e9eaec}.channel-inner{display:flex;align-items:center;white-space:nowrap;overflow-x:auto;min-height:44px;gap:0;scrollbar-width:thin}.channel-inner a{padding:0 17px;font-size:13px;color:#666;line-height:24px;border-right:1px solid #dedfe1}.channel-inner a:first-child{padding-left:0}.channel-inner a[aria-current=page],.channel-inner a:hover{color:#f45132}.mobile-drawer{display:block;position:fixed;inset:0 auto 0 0;width:360px;max-width:84vw;height:100vh;height:100dvh;background:#fff;z-index:12000;overflow-y:auto;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-head{display:flex;justify-content:space-between;align-items:center;padding:16px 20px;border-bottom:1px solid #eee}.drawer-brand{font-weight:800;font-size:21px;color:#f45132}.drawer-brand small{font-size:9px;letter-spacing:1px;color:#777}.drawer-close{background:transparent;border:0;font-size:30px;width:42px;height:42px}.drawer-group{padding:13px 20px;border-bottom:1px solid #eee}.drawer-group h2{font-size:14px;color:#999;margin:0 0 6px}.drawer-group a{display:block;padding:8px 10px;min-height:42px;font-size:15px;border-radius:6px}.drawer-group a:hover,.drawer-group a[aria-current=page]{background:#fff3ef;color:#f45132}.page-header{padding:37px 0 23px;border-bottom:1px solid #ebebeb}.eyebrow{font-size:13px;font-weight:700;color:#f45132;letter-spacing:1px}.page-header h1,.home-title{font-size:34px;line-height:1.38;color:#1a1a1a;margin:8px 0 16px}.lead{font-size:17px;line-height:1.85;color:#555;max-width:850px}.layout{display:grid;grid-template-columns:minmax(0,1fr) 280px;gap:45px;margin-top:30px;margin-bottom:50px;align-items:start}.article-body{min-width:0;max-width:820px}.article-body section{padding:0 0 24px;margin:0 0 30px;border-bottom:1px solid #eee}.article-body h2{font-size:24px;line-height:1.45;margin:0 0 14px;color:#1a1a1a}.article-body p{margin:0 0 16px;line-height:1.84}.sidebar{background:#f6f7f9;border-radius:13px;padding:22px}.sidebar h2{font-size:19px;margin:0 0 16px}.sidebar a{display:block;border-bottom:1px solid #e2e3e6;padding:11px 0;font-size:14px}.related-links{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin:24px 0 4px}.related-links a{display:flex;justify-content:space-between;align-items:center;gap:9px;padding:14px;border:1px solid #ededed;border-radius:10px;font-size:14px}.related-links span{color:#f45132;font-size:21px}.section-label{font-size:13px;color:#f45132;font-weight:700}.site-footer{background:#1a1a1a;color:#f5f5f5}.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:36px;padding-top:43px;padding-bottom:34px}.footer-grid h2{font-size:16px;margin:0 0 13px}.footer-grid a:not(.footer-logo){display:block;color:#ddd;font-size:14px;margin:8px 0}.footer-grid a:hover{color:#ff684e}.footer-brand p{font-size:14px;color:#bbb}.footer-logo{display:flex;align-items:center;gap:8px}.footer-bottom{border-top:1px solid #393939;display:flex;align-items:center;justify-content:space-between;gap:20px;font-size:12px;color:#bbb;padding:15px 0}.footer-bottom p{margin:0}.bottom-nav{display:none}.back-to-top{position:fixed;bottom:24px;right:22px;background:#fff;border:1px solid #ddd;border-radius:50%;width:42px;height:42px;box-shadow:0 2px 10px #0001;color:#f45132;opacity:0;pointer-events:none;transition:opacity .2s}.back-to-top.visible{opacity:1;pointer-events:auto}.media{display:flex;align-items:center;justify-content:center;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-placeholder{width:100%;height:100%;min-height:80px;background:#f6f7f9}.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}.media-logo .media-placeholder{min-height:0}.intro-block{padding:35px 0 15px}.hero-layout{display:grid;grid-template-columns:58fr 42fr;gap:28px;align-items:start}.hero-layout .media{max-height:290px}.hero-notes{display:grid;gap:12px}.hero-notes a,.link-row a{border-bottom:1px solid #e8e8e8;padding-bottom:12px}.hero-notes strong{font-size:17px;display:block;color:#1a1a1a}.hero-notes p{font-size:14px;margin:3px 0 0;color:#666}.home-section{padding:34px 0;border-top:1px solid #ededed}.home-section h2{font-size:25px;color:#1a1a1a;margin:0 0 18px}.home-section h3{font-size:18px;margin:0 0 8px}.home-section p{margin:0 0 12px}.quick-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}.quick-grid a{border:1px solid #e8e8e8;border-radius:12px;padding:17px}.quick-grid strong,.quick-grid span{display:block}.quick-grid span{font-size:14px;color:#666}.two-col{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:32px}.split-feature{display:grid;grid-template-columns:1.2fr 1fr;gap:36px}.link-row{display:grid;gap:10px}.link-row a{display:block}.pic-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}.pic-grid figure,.stagger-grid figure{margin:0;min-width:0}.pic-grid figcaption,.stagger-grid figcaption{font-size:14px;color:#666;margin:9px 0}.pic-grid strong,.stagger-grid strong{display:block;color:#222;font-size:16px}.pic-grid .media{max-height:150px}.stagger-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}.stagger-grid .media{max-height:220px}.number-list{counter-reset:article;display:grid;gap:14px}.number-list a{counter-increment:article;display:block;border-bottom:1px solid #ededed;padding:0 0 14px}.number-list a:before{content:counter(article,decimal-leading-zero);color:#f45132;font-weight:700;margin-right:13px}.number-list small{display:block;color:#777;margin-left:36px}.note{background:#f6f7f9;padding:18px 22px;border-left:3px solid #d7a84b;border-radius:6px}.qa-item{margin-bottom:22px}.qa-item h2{font-size:19px;margin-bottom:7px}.image-panel{max-width:320px;margin:0 auto}.photo-article{margin:20px 0 25px;max-width:450px}.image-panel .media-device{max-height:320px}.gallery-page{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px;margin:22px 0 35px}.gallery-page figure{margin:0;min-width:0}.gallery-page .media{max-height:160px}.gallery-page figcaption{font-size:14px;line-height:1.6;margin:8px 0;color:#666}.gallery-page figcaption strong{display:block;color:#222}.section-list{display:grid;gap:15px}.section-list a{display:block;padding:14px 18px;border-left:3px solid #f45132;background:#f6f7f9}.section-list strong{display:block}.section-list span{color:#666;font-size:14px}*:focus-visible{outline:2px solid #f45132;outline-offset:3px}@media(max-width:980px){.main-navigation{display:none}.top-inner{height:58px;justify-content:space-between}.brand{margin:auto}.brand-text{font-size:18px}.brand small{font-size:8px}.brand .media-logo{width:58px;height:29px}.brand .media-logo img{max-height:29px}.main-btn{height:36px;min-width:72px;padding:0 16px;margin:0}.mobile-drawer{width:min(84vw,320px)}.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.layout{grid-template-columns:1fr}.sidebar{display:none}}@media(max-width:768px){.container{width:calc(100% - 32px)}.page-header{padding:25px 0 17px}.page-header h1,.home-title{font-size:27px}.lead{font-size:15px}.article-body h2,.home-section h2{font-size:21px}.article-body{font-size:15px}.hero-layout,.split-feature,.two-col{grid-template-columns:1fr;gap:18px}.hero-layout .media{max-height:195px}.quick-grid,.pic-grid,.gallery-page{grid-template-columns:repeat(2,minmax(0,1fr))}.stagger-grid{grid-template-columns:1fr}.pic-grid .media{max-height:120px}.home-section{padding:26px 0}.footer-grid{gap:20px;padding:30px 0}.footer-bottom{display:block;padding-bottom:80px}.bottom-nav{height:60px;display:grid;grid-template-columns:repeat(4,1fr);position:fixed;bottom:0;left:0;right:0;z-index:1000;background:#fff;border-top:1px solid #ececec;box-shadow:0 -2px 10px #00000008;padding-bottom:env(safe-area-inset-bottom)}.bottom-nav a{display:flex;align-items:center;justify-content:center;font-size:13px}.bottom-nav a[aria-current=page]{color:#f45132;font-weight:700}.back-to-top{bottom:78px}.related-links{grid-template-columns:1fr 1fr}.image-panel{max-width:240px}.gallery-page .media{max-height:120px}}@media(max-width:375px){.top-inner{gap:6px}.brand{gap:3px}.brand-text{font-size:16px}.brand .media-logo{width:40px}.main-btn{padding:0 12px;min-width:72px}.quick-grid{gap:9px}.quick-grid a{padding:12px}.related-links{grid-template-columns:1fr}}