:root{--primary:#168FC4;--primary-2:#32B8D8;--primary-light:#AEE4F2;--primary-soft:#E4F5FA;--purple:#6E68B7;--purple-soft:#EFEEFA;--navy:#12364C;--navy-2:#0B2637;--navy-3:#071C29;--bg:#F4F9FB;--bg-2:#EAF3F7;--bg-3:#FAFDFE;--surface:#fff;--surface-dark:#102D3E;--text:#152D3A;--text-2:#526B78;--text-3:#8AA0AB;--line:rgba(22,143,196,.10);--line-strong:rgba(22,143,196,.24);--shadow:0 6px 24px rgba(14,74,103,.08);--shadow-hover:0 16px 38px rgba(14,74,103,.14);--radius:10px;--radius-card:14px;--radius-large:20px;--wrap:1320px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:system-ui,-apple-system,"Segoe UI","Microsoft YaHei",sans-serif;background:var(--bg);color:var(--text);line-height:1.7}a{color:inherit;text-decoration:none}img{max-width:100%;display:block}.wrap{width:min(var(--wrap),calc(100% - 40px));margin:auto}.flash{height:30px;background:var(--navy);color:#fff;font-size:13px;display:flex;align-items:center}.site-header{position:sticky;top:0;z-index:50;background:rgba(244,249,251,.94);backdrop-filter:blur(16px);border-bottom:1px solid var(--line)}.site-header.scrolled{background:rgba(255,255,255,.97)}.nav-wrap{height:68px;display:flex;align-items:center;gap:26px}.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:22px}.brand img{width:34px;height:34px;object-fit:contain}.desktop-nav{display:flex;gap:20px;flex:1}.desktop-nav a,.nav-actions a{color:var(--text-2);font-size:14px;position:relative}.desktop-nav a.active,.desktop-nav a:hover{color:var(--primary)}.desktop-nav a.active:after{content:"";position:absolute;left:20%;right:20%;bottom:-23px;height:2px;background:var(--primary-2)}.nav-actions{display:flex;gap:14px;align-items:center}.menu-btn{border:1px solid var(--line-strong);background:#fff;border-radius:999px;padding:8px 14px;color:var(--navy)}.hero{padding:72px 0;background:linear-gradient(135deg,#F4F9FB 0%,#EAF3F7 60%,#E5EFF4 100%)}.hero-grid{display:grid;grid-template-columns:1.5fr 1fr;gap:50px;align-items:center}.hero h1{font-size:clamp(38px,5vw,68px);line-height:1.08;margin:12px 0 20px;color:var(--navy)}.hero p{font-size:18px;color:var(--text-2);max-width:760px}.hero-image{border-radius:26px;overflow:hidden;box-shadow:var(--shadow-hover);background:#dcebf2}.hero-image img{width:100%;aspect-ratio:4/3;object-fit:cover}.eyebrow{display:inline-block;color:var(--primary);font-weight:700;font-size:13px;letter-spacing:.08em}.actions{display:flex;gap:12px;flex-wrap:wrap;margin:26px 0}.btn{display:inline-flex;align-items:center;justify-content:center;padding:12px 18px;border-radius:999px;background:var(--primary);color:#fff;font-weight:700}.btn.secondary{background:#fff;color:var(--navy);border:1px solid var(--line-strong)}.btn.ai{background:var(--purple)}.search-box{display:flex;gap:8px;background:#fff;padding:8px;border-radius:14px;box-shadow:var(--shadow)}.search-box input{flex:1;border:0;padding:10px 12px;font-size:15px;outline:none}.search-box button{border:0;background:var(--navy);color:#fff;border-radius:10px;padding:0 18px}.tag-wall{display:flex;flex-wrap:wrap;gap:10px}.tag{background:#fff;border:1px solid var(--line-strong);padding:7px 12px;border-radius:999px;color:var(--text-2);font-size:13px}.tag:hover{border-color:var(--primary-2);color:var(--primary)}.section{padding:66px 0}.section:nth-of-type(even){background:var(--bg-3)}.section.dark{background:var(--navy);color:#fff}.section.dark .section-head p{color:rgba(255,255,255,.72)}.section-head{max-width:820px;margin-bottom:28px}.section-head h2{font-size:clamp(28px,4vw,44px);line-height:1.2;margin:8px 0 12px;color:var(--navy)}.dark .section-head h2{color:#fff}.section-head p{color:var(--text-2);margin:0}.card-grid,.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.card,.feature{background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);padding:22px;box-shadow:var(--shadow);transition:.25s}.card:hover,.feature:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover)}.card h3,.feature h3{margin:7px 0 10px;color:var(--navy)}.card p,.feature p{color:var(--text-2)}.meta{display:flex;gap:10px;color:var(--text-3);font-size:13px}.text-link{display:inline-block;margin-top:12px;color:var(--primary);font-weight:700}.timeline{display:grid;grid-template-columns:repeat(6,1fr);gap:12px}.timeline div{background:#fff;border:1px solid var(--line);padding:16px;border-radius:14px}.timeline strong{display:block;color:var(--navy)}.split{display:grid;grid-template-columns:1fr 1fr;gap:24px;align-items:center}.media-card img{border-radius:20px;width:100%;aspect-ratio:16/10;object-fit:cover}.steps{list-style:none;padding:0;margin:0;display:grid;gap:14px}.steps li{display:flex;gap:16px;background:#fff;border:1px solid var(--line);padding:18px;border-radius:14px}.steps li>span{flex:none;width:34px;height:34px;border-radius:50%;background:var(--primary-soft);color:var(--primary);display:grid;place-items:center;font-weight:800}.steps p{margin:4px 0 0;color:var(--text-2)}.rank{counter-reset:rank;display:grid;gap:10px}.rank article{counter-increment:rank;background:#fff;border:1px solid var(--line);padding:14px 18px;border-radius:12px;display:grid;grid-template-columns:48px 1fr auto;gap:12px;align-items:center}.rank article:before{content:counter(rank,decimal-leading-zero);font-weight:800;color:var(--primary)}.checklist{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}.checklist div{background:#fff;padding:14px;border-radius:12px;border-left:4px solid var(--primary-2)}.faq{display:grid;gap:10px}.faq-item{background:#fff;border:1px solid var(--line);border-radius:12px;overflow:hidden}.faq-btn{width:100%;text-align:left;border:0;background:#fff;padding:18px;font-weight:700;color:var(--navy);display:flex;justify-content:space-between}.faq-panel{padding:0 18px 18px;color:var(--text-2)}.topic-hero{padding:58px 0 42px;background:linear-gradient(135deg,#EAF3F7,#F8FCFD)}.topic-hero h1{font-size:clamp(36px,5vw,60px);line-height:1.1;color:var(--navy);margin:8px 0 16px}.topic-hero p{max-width:820px;color:var(--text-2);font-size:18px}.notice{padding:18px;border-radius:14px;background:var(--purple-soft);border:1px solid rgba(110,104,183,.15);color:#4f4a89}.site-footer{background:linear-gradient(135deg,#12364C,#071C29);color:rgba(255,255,255,.72);padding:48px 0 90px;border-top:1px solid rgba(50,184,216,.25)}.footer-grid{display:grid;grid-template-columns:2fr repeat(5,1fr);gap:16px;align-items:start}.site-footer a:hover{color:#AEE4F2}.footer-brand{color:#fff}.copyright{padding-top:28px;margin-top:28px;border-top:1px solid rgba(255,255,255,.1)}.drawer{position:fixed;inset:0;background:rgba(7,28,41,.35);display:none;z-index:80}.drawer.open{display:block}.drawer-panel{margin-left:auto;width:min(460px,92vw);height:100%;background:#fff;padding:28px}.drawer-close{float:right;border:0;background:transparent;font-size:28px}.drawer-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}.drawer-grid a{background:var(--bg);padding:14px;border-radius:10px}.mobile-bar{display:none}.to-top{position:fixed;right:18px;bottom:24px;width:42px;height:42px;border:0;border-radius:50%;background:var(--navy);color:#fff;display:none}.to-top.show{display:block}.reveal{opacity:0;transform:translateY(12px);transition:.45s}.reveal.visible{opacity:1;transform:none}@media(max-width:1100px){.desktop-nav{display:none}.card-grid,.feature-grid{grid-template-columns:repeat(2,1fr)}.timeline{grid-template-columns:repeat(4,1fr)}.footer-grid{grid-template-columns:repeat(3,1fr)}}@media(max-width:768px){.wrap{width:min(100% - 24px,var(--wrap))}.flash{height:auto;padding:6px 0}.nav-actions a{display:none}.hero{padding:48px 0}.hero-grid,.split{grid-template-columns:1fr}.card-grid,.feature-grid,.checklist{grid-template-columns:1fr}.timeline{grid-template-columns:repeat(2,1fr)}.section{padding:48px 0}.footer-grid{grid-template-columns:1fr 1fr}.mobile-bar{position:fixed;left:0;right:0;bottom:0;display:grid;grid-template-columns:repeat(5,1fr);background:#fff;border-top:1px solid var(--line);z-index:60}.mobile-bar a{padding:12px 6px;text-align:center;font-size:12px}.to-top{bottom:72px}}@media(max-width:600px){.timeline{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr}.rank article{grid-template-columns:42px 1fr}.rank article span:last-child{grid-column:2}}@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}.reveal{opacity:1;transform:none}}:focus-visible{outline:3px solid var(--primary-2);outline-offset:3px}body{overflow-x:hidden}