把下面整段直接整份替换。已修好手机端 .drawer-mask 透明挡点击的问题。这版遮罩用的是 is-open，我按这个保留了。
CSS*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:#F6F8FF;color:#222;font-family:Arial,"PingFang SC","Microsoft YaHei",sans-serif;overflow-x:hidden}
body.drawer-open{overflow:hidden}
a{color:#365edb}
img{max-width:100%}
.site-header{position:sticky;top:0;z-index:9999;width:100%;background:linear-gradient(135deg,#F7F9FF 0%,#ECF0FF 52%,#EAF7FF 100%);box-shadow:0 8px 24px rgba(89,126,247,.10);backdrop-filter:blur(12px)}
.header-inner{max-width:1200px;min-height:72px;margin:0 auto;padding:0 20px;display:flex;align-items:center;justify-content:space-between;gap:16px}
.site-logo{flex:0 0 auto;text-decoration:none}
.site-logo img{display:block;height:40px;width:auto;max-width:168px;object-fit:contain}
.logo-placeholder{display:inline-flex;align-items:center;justify-content:center;min-width:132px;height:40px;padding:0 14px;border-radius:12px;background:#fff;color:#1D2B5F;font-weight:800;letter-spacing:.06em}
.logo-placeholder.light{background:#2b2b2b;color:#fff}
.nav-core{display:flex;align-items:center;gap:8px;white-space:nowrap;flex-wrap:nowrap;min-width:0}
.nav-core a{color:#1D2B5F;padding:8px 10px;border-radius:999px;font-weight:700;text-decoration:none;font-size:14px}
.nav-core a.is-current,.nav-core a:hover{background:rgba(255,255,255,.82);color:#597EF7}
.header-actions{display:flex;align-items:center;gap:8px;flex:0 0 auto}
.header-login{display:inline-flex;height:42px;align-items:center;padding:0 14px;border-radius:999px;color:#1D2B5F;text-decoration:none;font-weight:700;background:#fff}
.main-btn{position:relative;overflow:hidden;isolation:isolate;display:inline-flex;align-items:center;justify-content:center;height:42px;min-width:96px;padding:0 20px;background:linear-gradient(135deg,#7580EE 0%,#597EF7 48%,#7AC4F5 100%);color:#FFFFFF;border-radius:999px;text-decoration:none;font-weight:700;box-shadow:0 10px 24px rgba(89,126,247,.28)}
.main-btn::before{content:"";position:absolute;inset:-2px;border-radius:inherit;background:linear-gradient(120deg,transparent 0%,rgba(255,255,255,.85) 35%,transparent 70%);transform:translateX(-120%);animation:btnShine 2.4s infinite;z-index:-1}
.main-btn::after{content:"";position:absolute;inset:-1px;border-radius:inherit;border:1px solid rgba(255,255,255,.65);box-shadow:0 0 8px rgba(122,196,245,.55),0 0 18px rgba(89,126,247,.35);pointer-events:none}
@keyframes btnShine{0%{transform:translateX(-120%)}55%{transform:translateX(120%)}100%{transform:translateX(120%)}}
.channel-bar{background:#fff;border-top:1px solid rgba(89,126,247,.08)}
.channel-inner{max-width:1200px;margin:0 auto;padding:0 20px;display:flex;gap:8px;overflow-x:auto;scrollbar-width:thin}
.channel-inner a{flex:0 0 auto;padding:12px 10px;color:#5B647A;text-decoration:none;font-size:14px;white-space:nowrap}
.channel-inner a:hover{color:#597EF7}
.menu-toggle,.mobile-register{display:none}
.site-main{min-height:60vh;padding-bottom:20px}
.container{width:min(1200px,calc(100% - 40px));margin:0 auto}
.reading{width:min(860px,calc(100% - 40px));margin:0 auto}
.hero-copy{padding:56px 0 28px}
.eyebrow{margin:0 0 10px;color:#597EF7;font-size:13px;font-weight:800;letter-spacing:.12em}
.hero-copy h1,.page-hero h1{margin:0;color:#1D2B5F;font-size:clamp(38px,4vw,50px);line-height:1.12;letter-spacing:-.02em}
.hero-copy p,.page-hero p{max-width:760px;margin:18px 0 0;color:#5B647A;font-size:17px;line-height:1.8}
.home-carousel{position:relative;height:360px;border-radius:18px;background:#101827;overflow:hidden;box-shadow:0 16px 40px rgba(89,126,247,.10)}
.hero-slide{display:none;position:absolute;inset:0;align-items:center;justify-content:center;padding:16px}
.hero-slide.is-active{display:flex}
.hero-slide img{width:100%;height:100%;object-fit:contain;object-position:center;display:block}
.hero-placeholder{width:100%;height:100%;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#14213a,#1b2c50);color:#dbe6ff;font-size:18px}
.hero-prev,.hero-next{position:absolute;top:50%;transform:translateY(-50%);z-index:3;width:42px;height:42px;border:0;border-radius:50%;background:rgba(255,255,255,.88);color:#1D2B5F;font-size:24px;cursor:pointer}
.hero-prev{left:16px}
.hero-next{right:16px}
.hero-dots{position:absolute;left:0;right:0;bottom:14px;z-index:4;display:flex;justify-content:center;gap:8px}
.hero-dot{width:9px;height:9px;padding:0;border:0;border-radius:50%;background:rgba(255,255,255,.42);cursor:pointer}
.hero-dot.is-active{background:#fff;transform:scale(1.15)}
.quick-pills{display:flex;gap:10px;overflow-x:auto;padding:20px 0 8px}
.quick-pills a{flex:0 0 auto;text-decoration:none;color:#1D2B5F;background:#fff;border:1px solid rgba(89,126,247,.16);border-radius:999px;padding:10px 16px;font-weight:700}
.observation{margin:30px auto;padding:20px 24px;background:#fff;border-left:4px solid #597EF7;border-radius:16px;box-shadow:0 16px 40px rgba(89,126,247,.10);color:#34405c;line-height:1.8}
.section{padding:56px 0}
.section.compact{padding:38px 0}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:18px;margin-bottom:24px}
.section-head h2,.reading h2{margin:0;color:#1D2B5F;font-size:28px;line-height:1.25}
.section-head p{margin:0;max-width:620px;color:#5B647A;line-height:1.7}
.grid-3,.grid-4,.grid-2,.link-grid{display:grid;gap:18px}
.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid-4{grid-template-columns:repeat(4,minmax(0,1fr))}
.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}
.link-grid{grid-template-columns:repeat(3,minmax(0,1fr))}
.info-card,.topic-card,.service-card,.qa-card,.step-card,.note-box{background:#fff;border:1px solid rgba(89,126,247,.16);border-radius:18px;box-shadow:0 16px 40px rgba(89,126,247,.10)}
.info-card,.topic-card,.service-card,.qa-card{padding:22px}
.info-card h3,.topic-card h3,.service-card h3,.qa-card h3{margin:0 0 10px;color:#1D2B5F;font-size:19px}
.info-card p,.topic-card p,.service-card p,.qa-card p,.reading p,.reading li{color:#3b465f;line-height:1.82}
.info-card a,.topic-card a,.service-card a{font-weight:700;text-decoration:none}
.topic-card{min-height:150px}
.split{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:30px;align-items:center}
.split.reverse .media{order:2}
.split-copy h2{margin:0 0 14px;color:#1D2B5F;font-size:30px}
.split-copy p{margin:0 0 12px;color:#3b465f;line-height:1.82}
.media{position:relative;width:100%;max-width:100%;overflow:hidden;border-radius:16px;background:#ECF0FF;aspect-ratio:16/9;min-height:220px}
.media.card-media{min-height:160px;max-height:184px}
.media > img{position:absolute;inset:0;width:100%;height:100%;object-fit:contain;object-position:center center;display:block}
.media-placeholder{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#ECF0FF,#EAF7FF);color:#7d89a7;font-weight:700}
.app-banner{display:flex;align-items:center;justify-content:space-between;gap:22px;padding:28px 30px;border-radius:18px;background:linear-gradient(135deg,#ECF0FF,#EAF7FF);border:1px solid rgba(89,126,247,.16)}
.app-banner h2{margin:0 0 8px;color:#1D2B5F}
.app-banner p{margin:0;color:#5B647A;line-height:1.7}
.page-hero{padding:60px 0 34px}
.breadcrumb{margin-bottom:14px;color:#77829b;font-size:14px}
.breadcrumb a{text-decoration:none}
.reading section{margin:0 0 42px}
.reading h2{margin-bottom:14px}
.reading h3{color:#1D2B5F}
.lead{font-size:18px;color:#34405c;line-height:1.85}
.toc{padding:22px 24px;background:#fff;border:1px solid rgba(89,126,247,.16);border-radius:18px;box-shadow:0 16px 40px rgba(89,126,247,.10)}
.toc h2{font-size:22px}
.toc ul{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px 18px;margin:12px 0 0;padding-left:20px}
.steps{counter-reset:step;display:grid;gap:14px}
.step-card{position:relative;padding:20px 20px 20px 70px}
.step-card::before{counter-increment:step;content:counter(step);position:absolute;left:20px;top:20px;width:34px;height:34px;border-radius:50%;display:flex;align-items:center;justify-content:center;background:#ECF0FF;color:#597EF7;font-weight:800}
.compare{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}
.compare article{padding:22px;background:#fff;border:1px solid rgba(89,126,247,.16);border-radius:18px}
.compare h2,.compare h3{margin-top:0;color:#1D2B5F}
.quote-note{padding:22px 24px;border-radius:18px;background:#1D2B5F;color:#fff;line-height:1.8}
.quote-note strong{color:#fff}
.mini-links{display:flex;flex-wrap:wrap;gap:10px}
.mini-links a{padding:9px 13px;border-radius:999px;background:#fff;border:1px solid rgba(89,126,247,.16);text-decoration:none;font-weight:700}
.faq-list{display:grid;gap:16px}
.faq-item{padding:22px;background:#fff;border:1px solid rgba(89,126,247,.16);border-radius:18px}
.faq-item h2,.faq-item h3{margin-top:0;color:#1D2B5F}
.notice{padding:18px 20px;border-radius:16px;background:#EAF7FF;border:1px solid rgba(89,126,247,.16);color:#33415c;line-height:1.8}
.site-footer{margin-top:70px;background:#1F1F1F;color:#D7DCE8}
.footer-grid{width:min(1200px,calc(100% - 40px));margin:0 auto;padding:48px 0 34px;display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:28px}
.footer-grid h2{margin:0 0 14px;color:#fff;font-size:16px}
.footer-grid a{display:block;margin:9px 0;color:#D7DCE8;text-decoration:none}
.footer-grid p{line-height:1.75}
.footer-logo img{height:40px;width:auto;max-width:168px;object-fit:contain}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding:20px;display:flex;justify-content:space-between;gap:20px;width:min(1200px,100%);margin:0 auto}
.footer-bottom p{margin:0;color:#b8bfce;font-size:13px;line-height:1.7}
.float-tools{position:fixed;right:14px;top:50%;transform:translateY(-50%);z-index:120;display:flex;flex-direction:column;gap:8px;width:112px}
.float-tools>a,.float-tools>button{display:flex;align-items:center;justify-content:center;min-height:40px;padding:8px 10px;border:1px solid rgba(89,126,247,.16);border-radius:12px;background:#fff;color:#365edb;text-decoration:none;font-weight:700;box-shadow:0 10px 24px rgba(89,126,247,.10)}
.float-tools .main-btn{color:#fff;border:0}
.to-top{font:inherit;cursor:pointer}
.mobile-bottom{display:none}
.mobile-drawer,.drawer-mask{display:none}

@media (max-width:1080px){
.nav-core{gap:2px}
.nav-core a{padding:8px 7px;font-size:13px}
.header-inner{padding:0 14px}
.header-actions .header-login{display:none}
.grid-4{grid-template-columns:repeat(3,minmax(0,1fr))}
.float-tools{display:none}
.container,.reading{width:min(100% - 32px,1200px)}
}

@media (max-width:760px){
.site-header{position:sticky}
.header-inner{min-height:64px;padding:0 12px;display:grid;grid-template-columns:88px 1fr 108px;gap:6px}
.nav-core,.header-actions,.channel-bar{display:none}
.menu-toggle{display:inline-flex;width:44px;height:44px;align-items:center;justify-content:center;flex-direction:column;gap:5px;border:0;border-radius:12px;background:#fff}
.menu-toggle span{display:block;width:20px;height:2px;background:#1D2B5F}
.site-logo{justify-self:center;min-width:0}
.site-logo img{height:34px;max-width:142px}
.mobile-register{display:inline-flex;justify-self:end;min-width:100px;height:40px;padding:0 14px;font-size:14px}
.mobile-drawer{display:block;position:fixed;left:0;top:0;bottom:0;width:min(84vw,320px);z-index:12000;background:#fff;transform:translateX(-102%);transition:transform .22s ease;box-shadow:16px 0 40px rgba(20,37,75,.2)}
.mobile-drawer.is-open{transform:translateX(0)}
.drawer-mask{display:none;position:fixed;inset:0;z-index:11900;background:rgba(16,24,39,.42);opacity:0;pointer-events:none;transition:opacity .22s ease}
.drawer-mask.is-open{display:block;opacity:1;pointer-events:auto}
.drawer-head{height:66px;padding:0 14px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid #edf0f7}
.drawer-logo img{height:34px;width:auto;max-width:150px;object-fit:contain}
.drawer-close{width:42px;height:42px;border:0;border-radius:12px;background:#ECF0FF;color:#1D2B5F;font-size:28px}
.drawer-scroll{height:calc(100vh - 66px);overflow:auto;padding:16px 14px 90px}
.drawer-scroll section{margin-bottom:18px}
.drawer-scroll h2{margin:0 0 8px;color:#8790a5;font-size:12px;letter-spacing:.1em}
.drawer-scroll a{display:block;padding:10px 10px;border-radius:10px;color:#1D2B5F;text-decoration:none;font-weight:700}
.drawer-scroll a:hover{background:#F6F8FF}
.hero-copy{padding:40px 0 22px}
.hero-copy h1,.page-hero h1{font-size:clamp(28px,8vw,34px)}
.page-hero{padding:42px 0 26px}
.hero-copy p,.page-hero p{font-size:16px}
.home-carousel{height:210px}
.hero-prev,.hero-next{width:36px;height:36px}
.section{padding:44px 0}
.section-head{display:block}
.section-head h2{font-size:25px;margin-bottom:8px}
.grid-3,.grid-2,.link-grid,.compare{grid-template-columns:1fr}
.grid-4{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
.topic-card{min-height:142px;padding:18px}
.split,.split.reverse{grid-template-columns:1fr;gap:20px}
.split.reverse .media{order:0}
.split-copy h2{font-size:26px}
.media{min-height:220px}
.app-banner{align-items:flex-start;flex-direction:column;padding:24px}
.toc ul{grid-template-columns:1fr}
.reading{width:min(100% - 30px,860px)}
.footer-grid{grid-template-columns:1fr 1fr;width:min(100% - 30px,1200px);padding-bottom:94px}
.footer-brand{grid-column:1/-1}
.footer-bottom{padding:18px 15px 86px;display:block}
.footer-bottom p+p{margin-top:10px}
.mobile-bottom{position:fixed;left:0;right:0;bottom:0;z-index:9000;height:62px;display:grid;grid-template-columns:repeat(4,1fr);background:#fff;border-top:1px solid rgba(89,126,247,.16);box-shadow:0 -8px 24px rgba(89,126,247,.09)}
.mobile-bottom a{display:flex;align-items:center;justify-content:center;color:#1D2B5F;text-decoration:none;font-weight:700;font-size:14px}
.site-footer{margin-top:50px}
.site-main{padding-bottom:68px}
}

@media (max-width:430px){
.header-inner{grid-template-columns:74px 1fr 98px}
.mobile-register{min-width:92px;padding:0 10px}
.site-logo img{max-width:132px}
.container{width:calc(100% - 28px)}
.home-carousel{height:195px}
.grid-4{gap:10px}
.topic-card{padding:15px;min-height:136px}
.topic-card h3{font-size:17px}
.topic-card p{font-size:14px}
.footer-grid{grid-template-columns:1fr}
.footer-brand{grid-column:auto}
}

@media (max-width:390px){
.header-inner{grid-template-columns:66px 1fr 92px}
.menu-toggle{width:40px}
.mobile-register{min-width:88px;font-size:13px}
.site-logo img{max-width:124px}
.home-carousel{height:188px}
}

@media (max-width:375px){
.header-inner{grid-template-columns:60px 1fr 88px}
.mobile-register{min-width:84px;padding:0 8px}
.site-logo img{max-width:118px}
.home-carousel{height:182px}
}