*{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}h1,h2,h3{color:#1a1a1a;line-height:1.38;margin:0 0 14px}p{margin:0 0 16px}img{max-width:100%;height:auto}.container{max-width:1160px;margin:auto;padding:32px 24px 65px;min-height:50vh}.skip-link{position:absolute;left:-9999px}.skip-link:focus{left:16px;top:12px;background:#fff;z-index:20000}.site-header{background:#fff;border-bottom:1px solid #eceef1}.top-inner{max-width:1160px;margin:auto;min-height:70px;padding:0 24px;display:flex;align-items:center;gap:18px}.menu-trigger{width:42px;height:42px;flex:0 0 42px;border:0;background:transparent;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:5px;border-radius:8px}.menu-trigger span{display:block;width:22px;height:2px;background:#333}.menu-trigger:hover{background:#f6f7f9}.brand{display:flex;align-items:center;flex:0 0 auto;min-width:115px}.brand-image{height:38px;max-width:155px;background:transparent;border-radius:0}.brand-image img{height:auto;max-height:38px;width:auto;object-fit:contain}.brand-text{font-size:23px;font-weight:900;color:#f45132;letter-spacing:.4px;white-space:nowrap}.brand-text span{color:#242424}.main-nav{display:flex;align-items:stretch;margin-left:auto;gap:24px;align-self:stretch;white-space:nowrap}.main-nav a{display:flex;align-items:center;border-bottom:2px solid transparent;font-size:15px}.main-nav a.active{color:#f45132;border-color:#f45132}.main-btn{margin-left:auto;display:inline-flex;align-items:center;justify-content:center;min-width:78px;height:40px;padding:0 20px;border-radius:999px;background:#f45132;color:white;font-weight:700;white-space:nowrap;font-size:14px}.main-btn:hover{background:#ff684e;color:white}.channel-nav{background:#f6f7f9;border-bottom:1px solid #e9eaed}.channel-inner{max-width:1160px;margin:auto;display:flex;gap:0;align-items:center;overflow-x:auto;white-space:nowrap;padding:0 24px;scrollbar-width:thin}.channel-inner a{font-size:13px;line-height:44px;color:#666;flex:0 0 auto}.channel-inner a+a:before{content:'|';color:#d6d8dd;padding:0 16px}.channel-inner a.active{color:#f45132}.mobile-drawer{display:block;position:fixed;inset:0 auto 0 0;width:360px;max-width:84vw;height:100vh;height:100dvh;background:white;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-heading{display:flex;justify-content:space-between;align-items:center;padding:16px 22px;border-bottom:1px solid #eee;color:#f45132}.drawer-close{border:0;background:transparent;font-size:30px;line-height:1;width:42px;height:42px}.drawer-group{padding:14px 18px;border-bottom:1px solid #f0f0f0}.drawer-group h2{font-size:15px;color:#999;margin:0 0 8px}.drawer-group a{display:block;padding:7px 10px;min-height:40px;border-radius:6px;font-size:15px}.drawer-group a.active,.drawer-group a:hover{background:#fff3ef;color:#f45132}.page-intro{padding:14px 0 22px;border-bottom:1px solid #eceef1;margin-bottom:28px}.eyebrow{font-size:12px;letter-spacing:1.5px;color:#d7a84b;font-weight:700;margin-bottom:8px}.page-intro h1{font-size:32px}.page-intro>p{max-width:850px;color:#555;font-size:17px}.article-layout{display:grid;grid-template-columns:minmax(0,800px) minmax(200px,1fr);gap:38px;align-items:start}.article-body{min-width:0}.reading-section{padding:0 0 20px;border-bottom:1px solid #eee;margin:0 0 25px}.reading-section h2{font-size:24px}.reading-section p,.article-body>p{line-height:1.85}.article-body>p{padding:0 0 15px;color:#555}.side-note{background:#f6f7f9;border-radius:13px;padding:22px;min-width:0}.side-note h2{font-size:20px}.side-note p{font-size:14px;color:#666}.link-stack{list-style:none;padding:0;margin:0}.link-stack li{border-top:1px solid #e2e3e7}.link-stack a{display:block;padding:10px 0;color:#444}.link-stack a:hover{color:#f45132}.section-block{margin:44px 0 30px}.section-block h2{font-size:25px}.section-lead{max-width:860px;color:#666}.feature-figure{max-width:830px;margin:0 0 34px}.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-natural img{width:100%;height:auto;max-height:270px;object-fit:contain;margin:auto}.media-square{aspect-ratio:1/1}.media-square img{max-width:100%;max-height:100%;object-fit:contain}.media-banner{aspect-ratio:16/7}.media-banner img{max-height:100%;object-fit:contain}.media-device{aspect-ratio:9/16}.media-device img{max-height:100%;object-fit:contain}.media-placeholder{background:#f6f7f9;width:100%;min-height:110px;aspect-ratio:16/9}.media-square .media-placeholder{aspect-ratio:1}.media-device .media-placeholder{aspect-ratio:9/16}.visual-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}.visual-card{margin:0;border:1px solid #e9ebef;padding:12px;border-radius:13px;min-width:0}.visual-card strong{display:block;font-size:15px;margin:10px 0 4px}.visual-card p{font-size:13px;color:#666;line-height:1.65}.visual-card .media{max-height:155px}.visual-card .media-placeholder{min-height:85px}.topic-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:15px}.topic-tile{display:block;padding:20px;border:1px solid #eceef1;border-radius:12px;min-width:0;background:#fff}.topic-tile h3{font-size:18px}.topic-tile p{font-size:14px;color:#666}.topic-tile span{font-size:13px;color:#f45132}.story-line{display:flex;gap:18px;padding:18px 0;border-bottom:1px solid #eee}.story-number{color:#d7a84b;font-weight:700;font-size:19px}.story-line h3{font-size:18px}.story-line p{font-size:14px;color:#666}.story-line a,.inline-links a{color:#f45132}.faq-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.faq-grid details{border:1px solid #e5e5e5;border-radius:10px;padding:12px 16px;align-self:start}.faq-grid summary{cursor:pointer;font-weight:650}.faq-grid p{font-size:14px;color:#555;margin:10px 0 0}.closing{background:#f6f7f9;border-radius:14px;padding:24px}.inline-links{display:flex;flex-wrap:wrap;gap:15px}.site-footer{background:#1a1a1a;color:#f5f5f5}.footer-inner{max-width:1160px;padding:44px 24px 28px;margin:auto;display:grid;grid-template-columns:2fr repeat(3,1fr);gap:32px}.footer-inner h2{font-size:16px;color:#fff;margin:0 0 10px}.footer-inner a{display:block;font-size:14px;color:#ddd;padding:3px 0}.footer-inner a:hover{color:#ff684e}.footer-brand{font-size:22px;color:white}.footer-brand small{font-size:12px;color:#d7a84b}.footer-about p{font-size:14px;color:#ccc;margin-top:12px}.footer-bottom{max-width:1160px;margin:auto;border-top:1px solid #333;padding:18px 24px 26px;color:#bbb;font-size:13px}.bottom-nav{display:none}.to-top{position:fixed;right:20px;bottom:20px;border:1px solid #eee;border-radius:50%;background:#fff;color:#333;width:42px;height:42px;box-shadow:0 3px 15px #0002}.home-title{margin:5px 0 23px}.home-title h1{font-size:36px}.home-title>p{max-width:900px;color:#555;font-size:17px}.hero-grid{display:grid;grid-template-columns:minmax(0,58fr) minmax(0,42fr);gap:24px;align-items:start}.hero-news{display:grid;gap:11px}.hero-news article{border-bottom:1px solid #eceef1;padding-bottom:10px}.hero-news h2{font-size:19px;margin:0 0 5px}.hero-news p{font-size:14px;color:#666;margin:0 0 4px}.hero-news a,.text-link{font-size:14px;color:#f45132}.home-section{margin:42px 0}.home-section .section-heading{display:flex;align-items:baseline;justify-content:space-between;gap:10px;border-bottom:1px solid #e9e9e9;padding-bottom:8px;margin-bottom:17px}.home-section .section-heading h2{font-size:25px;margin:0}.home-section .section-heading a{font-size:14px;color:#f45132}.index-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}.index-link{padding:16px;border:1px solid #e8eaee;border-radius:10px}.index-link h3{font-size:18px}.index-link p{font-size:14px;color:#666}.two-col{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:28px}.narrative h3{font-size:19px}.narrative p{color:#555}.compact-list{padding:0;margin:0;list-style:none}.compact-list li{padding:13px 0;border-bottom:1px solid #eee}.compact-list li a{font-weight:650}.compact-list small{display:block;font-size:13px;color:#777}.mini-cards{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}.mini-cards figure{margin:0;min-width:0}.mini-cards figcaption{font-size:14px;line-height:1.6;margin-top:8px}.mini-cards figcaption strong{display:block}.mini-cards figcaption span{color:#666;font-size:13px}.mini-cards .media{max-height:150px}.number-list{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px 25px}.number-list li{display:flex;gap:14px;padding:12px 0;border-bottom:1px solid #eee}.number-list b{color:#d7a84b}.number-list h3{font-size:17px}.number-list p{font-size:14px;color:#666}.photo-pair{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}.photo-pair figure{margin:0}.photo-pair figcaption{font-size:14px;color:#666;margin-top:8px}.app-panel{display:grid;grid-template-columns:minmax(0,2fr) minmax(0,1fr);gap:28px;align-items:center;background:#f6f7f9;padding:24px;border-radius:14px}.app-panel .media{max-width:240px;margin:auto}.help-links{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.help-links a{padding:16px;border-left:3px solid #d7a84b;background:#f6f7f9}.help-links strong{display:block}.help-links span{font-size:13px;color:#666}@media(max-width:980px){.top-inner{min-height:58px;padding:0 20px}.brand{margin:0 auto;min-width:0}.brand-image{height:30px}.brand-image img{max-height:30px}.brand-text{font-size:21px}.main-nav{display:none}.main-btn{margin:0;height:36px;min-width:72px;padding:0 15px}.channel-inner{padding:0 20px}.mobile-drawer{width:min(84vw,320px)}.container{padding:24px 20px 70px}.bottom-nav{position:fixed;bottom:0;left:0;right:0;height:60px;padding-bottom:env(safe-area-inset-bottom);box-sizing:content-box;display:grid;grid-template-columns:repeat(4,1fr);background:white;border-top:1px solid #e8e8e8;z-index:1000}.bottom-nav a{text-align:center;font-size:12px;color:#777;display:flex;flex-direction:column;align-items:center;justify-content:center;line-height:1.35}.bottom-nav a span{font-size:20px}.bottom-nav a.active{color:#f45132}.site-footer{padding-bottom:calc(62px + env(safe-area-inset-bottom))}.to-top{bottom:76px}.article-layout{grid-template-columns:minmax(0,1fr) minmax(190px,.4fr);gap:22px}.visual-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.footer-inner{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(max-width:700px){.container{padding:22px 16px 70px}.top-inner{padding:0 16px;gap:6px}.channel-inner{padding:0 16px}.page-intro h1{font-size:26px}.page-intro>p{font-size:15px}.home-title h1{font-size:28px}.home-title>p{font-size:15px}.hero-grid,.two-col,.article-layout,.app-panel{grid-template-columns:minmax(0,1fr)}.hero-grid{gap:18px}.index-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.topic-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.visual-grid,.mini-cards{grid-template-columns:repeat(2,minmax(0,1fr))}.photo-pair,.number-list,.faq-grid{grid-template-columns:minmax(0,1fr)}.help-links{grid-template-columns:minmax(0,1fr)}.home-section{margin:30px 0}.home-section .section-heading h2,.section-block h2{font-size:22px}.reading-section h2{font-size:21px}.footer-inner{padding:30px 16px;gap:20px}.footer-bottom{padding:15px 16px}.visual-card{padding:8px}.visual-card .media{max-height:120px}.mini-cards .media{max-height:130px}.app-panel .media{max-width:180px}.side-note{padding:18px}}@media(max-width:360px){.brand-text{font-size:19px}.brand-image{max-width:120px}.main-btn{padding:0 12px}.index-grid,.topic-grid{grid-template-columns:minmax(0,1fr)}.visual-grid{gap:10px}.top-inner{padding:0 10px}}