*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:#F6F8FF;color:#222;font-family:Arial,"PingFang SC","Microsoft YaHei",sans-serif;line-height:1.82;overflow-x:hidden}
a{color:inherit}
img{max-width:100%}
button,input,select{font:inherit}
.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,.drawer-logo,.footer-logo{display:inline-flex;align-items:center;text-decoration:none;flex:0 0 auto}
.site-logo img,.drawer-logo img,.footer-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:128px;height:40px;padding:0 12px;border:1px solid rgba(89,126,247,.16);border-radius:12px;background:#fff;color:#1D2B5F;font-weight:800;letter-spacing:.04em}
.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:10px;flex:0 0 auto}
.login-link{color:#1D2B5F;font-weight:700;text-decoration:none;padding:8px}
.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);white-space:nowrap}
.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%)}}
.menu-toggle,.mobile-register{display:none}
.channel-bar{display:block;background:#fff;border-bottom:1px solid rgba(89,126,247,.11)}
.channel-inner{max-width:1200px;margin:0 auto;padding:0 20px;display:flex;align-items:center;gap:2px;overflow-x:auto;scrollbar-width:thin;white-space:nowrap}
.channel-inner a{flex:0 0 auto;color:#5B647A;text-decoration:none;padding:11px 9px;font-size:13px;font-weight:700}
.channel-inner a:hover,.channel-inner a.is-current{color:#597EF7}
.site-main{min-height:60vh}
.container{width:min(1200px,calc(100% - 40px));margin:0 auto}
.reading{width:min(860px,calc(100% - 40px));margin:0 auto}
.section{padding:64px 0}
.section-sm{padding:38px 0}
.hero-title{font-size:clamp(38px,4vw,50px);line-height:1.18;color:#1D2B5F;margin:0 0 20px;letter-spacing:-.02em}
.page-kicker{display:inline-flex;align-items:center;gap:8px;margin:0 0 12px;color:#597EF7;font-weight:800}
.page-lead{font-size:18px;color:#5B647A;max-width:780px;margin:0}
.page-head{padding:64px 0 34px;background:linear-gradient(180deg,#EEF3FF 0%,rgba(246,248,255,0) 100%)}
.page-head .reading{display:grid;gap:18px}
.hero-slider{position:relative;overflow:hidden;background:#101827;border-radius:18px;height:360px;box-shadow:0 18px 42px rgba(16,24,39,.18)}
.hero-slide{position:absolute;inset:0;opacity:0;visibility:hidden;transition:opacity .35s ease}
.hero-slide.is-active{opacity:1;visibility:visible}
.hero-slide img{position:absolute;inset:0;width:100%;height:100%;object-fit:contain;object-position:center;display:block}
.hero-slide .media-placeholder{height:100%;background:linear-gradient(135deg,#101827,#1D2B5F);color:#DDE6FF}
.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:3;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(1.2)}
.pill-scroll{display:flex;gap:10px;overflow-x:auto;padding:6px 0 2px;white-space:nowrap}
.pill-scroll a{flex:0 0 auto;text-decoration:none;background:#fff;color:#1D2B5F;border:1px solid rgba(89,126,247,.16);border-radius:999px;padding:9px 14px;font-weight:700;box-shadow:0 8px 20px rgba(89,126,247,.06)}
.pill-scroll a:hover{color:#597EF7}
.observation{display:flex;gap:16px;align-items:flex-start;background:#fff;border:1px solid rgba(89,126,247,.16);border-radius:18px;padding:20px 22px;box-shadow:0 16px 40px rgba(89,126,247,.08)}
.observation strong{color:#1D2B5F;white-space:nowrap}
.grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}
.grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px}
.topic-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}
.card{background:#fff;border:1px solid rgba(89,126,247,.14);border-radius:18px;padding:22px;box-shadow:0 16px 40px rgba(89,126,247,.08);min-width:0}
.card h2,.card h3{margin:0 0 10px;color:#1D2B5F;line-height:1.35}
.card p{margin:0;color:#5B647A}
.card-link{display:inline-flex;margin-top:14px;color:#597EF7;font-weight:800;text-decoration:none}
.topic-card{background:#fff;border:1px solid rgba(89,126,247,.14);border-radius:16px;padding:18px;text-decoration:none;min-height:130px;display:flex;flex-direction:column;justify-content:space-between;box-shadow:0 12px 28px rgba(89,126,247,.07)}
.topic-card strong{color:#1D2B5F;font-size:18px}
.topic-card span{color:#5B647A;font-size:14px}
.split{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);gap:30px;align-items:center}
.split.reverse .copy{order:2}
.split.reverse .visual{order:1}
.copy h2{margin:0 0 14px;color:#1D2B5F;font-size:30px;line-height:1.3}
.copy p{margin:0 0 15px}
.text-links{display:flex;flex-wrap:wrap;gap:10px 18px;margin-top:18px}
.text-links a{color:#597EF7;font-weight:800;text-decoration:none}
.media{position:relative;width:100%;max-width:100%;overflow:hidden;border-radius:16px;background:#ECF0FF;aspect-ratio:16/9}
.media>img{position:absolute;inset:0;width:100%;height:100%;object-fit:contain;object-position:center center;display:block}
.media-card{min-height:160px;max-height:184px}
.media-wide{min-height:220px;max-height:260px}
.media-placeholder{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#ECF0FF,#EAF7FF);color:#75809A;font-weight:700;text-align:center;padding:20px}
.app-banner{background:linear-gradient(135deg,#ECF0FF,#EAF7FF);border:1px solid rgba(89,126,247,.16);border-radius:18px;padding:26px 28px;display:flex;align-items:center;justify-content:space-between;gap:24px}
.app-banner h2{margin:0 0 8px;color:#1D2B5F}
.app-banner p{margin:0;color:#5B647A}
.notice-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}
.notice{background:#fff;border-left:4px solid #597EF7;border-radius:14px;padding:20px 22px;box-shadow:0 12px 28px rgba(89,126,247,.07)}
.notice h2,.notice h3{margin:0 0 8px;color:#1D2B5F}
.notice p{margin:0}
.faq-list{display:grid;gap:14px}
.faq-item{background:#fff;border:1px solid rgba(89,126,247,.14);border-radius:16px;padding:20px 22px}
.faq-item h2,.faq-item h3{margin:0 0 9px;color:#1D2B5F;font-size:19px}
.faq-item p{margin:0;color:#4B556A}
.article h2{font-size:28px;color:#1D2B5F;line-height:1.35;margin:34px 0 12px}
.article h3{font-size:21px;color:#1D2B5F;line-height:1.4;margin:26px 0 10px}
.article p{margin:0 0 16px;font-size:17px}
.article ul,.article ol{padding-left:1.35em;margin:12px 0 18px}
.article li{margin:8px 0}
.article-nav{display:flex;flex-wrap:wrap;gap:10px;margin:18px 0 28px}
.article-nav a{background:#fff;border:1px solid rgba(89,126,247,.16);border-radius:999px;padding:8px 13px;color:#597EF7;text-decoration:none;font-weight:700}
.step-list{counter-reset:step;display:grid;gap:14px;margin:22px 0}
.step{position:relative;background:#fff;border:1px solid rgba(89,126,247,.14);border-radius:16px;padding:20px 20px 20px 68px}
.step::before{counter-increment:step;content:counter(step);position:absolute;left:20px;top:20px;width:32px;height:32px;border-radius:50%;display:flex;align-items:center;justify-content:center;background:#ECF0FF;color:#597EF7;font-weight:800}
.step h2,.step h3{margin:0 0 8px;color:#1D2B5F}
.step p{margin:0}
.compare-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px;margin:24px 0}
.compare-box{background:#fff;border:1px solid rgba(89,126,247,.14);border-radius:16px;padding:22px}
.compare-box h2,.compare-box h3{margin:0 0 10px;color:#1D2B5F}
.quote-note{margin:24px 0;padding:22px 24px;background:#EEF3FF;border-radius:16px;color:#1D2B5F;font-weight:700}
.index-heading{display:flex;justify-content:space-between;gap:18px;align-items:end;margin-bottom:22px}
.index-heading h2{margin:0;color:#1D2B5F;font-size:30px}
.index-heading p{margin:0;color:#5B647A}
.site-footer{background:#1F1F1F;color:#D7DCE8;margin-top:56px}
.footer-grid{width:min(1200px,calc(100% - 40px));margin:0 auto;padding:48px 0 34px;display:grid;grid-template-columns:1.35fr repeat(3,1fr);gap:28px}
.footer-grid h2{font-size:16px;color:#fff;margin:0 0 14px}
.footer-grid a{display:block;color:#D7DCE8;text-decoration:none;margin:7px 0}
.footer-grid a:hover{color:#fff}
.footer-brand p{max-width:330px}
.footer-logo .logo-placeholder{background:#2B2B2B;color:#fff;border-color:#3C465D}
.footer-bottom{border-top:1px solid rgba(255,255,255,.10);padding:20px max(20px,calc((100% - 1200px)/2));font-size:13px;color:#BFC5D2;display:flex;justify-content:space-between;gap:28px}
.footer-bottom p{margin:0}
.floating-tools{position:fixed;right:14px;top:50%;transform:translateY(-42%);z-index:1200;width:58px;display:grid;gap:8px}
.floating-tools a,.floating-tools button{border:1px solid rgba(89,126,247,.18);background:#fff;color:#597EF7;border-radius:13px;padding:9px 6px;text-decoration:none;font-weight:700;font-size:12px;text-align:center;box-shadow:0 10px 24px rgba(89,126,247,.10);cursor:pointer}
.floating-tools .float-register{height:auto;min-width:0;padding:10px 6px;color:#fff;border-radius:13px}
.mobile-bottom,.mobile-drawer,.drawer-overlay{display:none}
.drawer-open{overflow:hidden}
.muted{color:#5B647A}
.tag{display:inline-flex;padding:5px 10px;border-radius:999px;background:#ECF0FF;color:#597EF7;font-size:13px;font-weight:800}
.rule-line{height:1px;background:rgba(89,126,247,.14);margin:26px 0}
.mini-list{display:grid;gap:12px}
.mini-item{padding:16px 18px;background:#fff;border:1px solid rgba(89,126,247,.14);border-radius:14px}
.mini-item strong{display:block;color:#1D2B5F;margin-bottom:4px}
.brand-strip{display:flex;flex-wrap:wrap;gap:12px}
.brand-strip a{padding:10px 14px;border-radius:999px;background:#fff;border:1px solid rgba(89,126,247,.16);text-decoration:none;color:#1D2B5F;font-weight:700}
.soft-panel{background:linear-gradient(135deg,#fff,#F1F5FF);border:1px solid rgba(89,126,247,.14);border-radius:18px;padding:26px}
.soft-panel h2{margin-top:0}
.timeline{position:relative;margin:24px 0;padding-left:28px}
.timeline::before{content:"";position:absolute;left:7px;top:6px;bottom:6px;width:2px;background:#C9D5FF}
.timeline-item{position:relative;padding:0 0 22px 18px}
.timeline-item::before{content:"";position:absolute;left:-27px;top:8px;width:12px;height:12px;border-radius:50%;background:#597EF7;box-shadow:0 0 0 5px #ECF0FF}
.timeline-item h3{margin:0 0 6px;color:#1D2B5F}
.timeline-item p{margin:0}
.accent-box{background:#101827;color:#E9EEFF;border-radius:18px;padding:26px}
.accent-box h2{margin:0 0 10px;color:#fff}
.accent-box p{margin:0;color:#D5DDF2}
.compact-links{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}
.compact-links a{background:#fff;border:1px solid rgba(89,126,247,.14);padding:15px 16px;border-radius:14px;text-decoration:none;color:#1D2B5F;font-weight:700}
.compact-links a:hover{color:#597EF7}
.aside-note{font-size:14px;color:#5B647A;border-left:3px solid #597EF7;padding-left:14px}
.mobile-register{font-size:13px;min-width:92px;padding:0 13px;height:40px}
.drawer-overlay{display:none;position:fixed;inset:0;z-index:10000;background:rgba(16,24,39,.42);opacity:0;pointer-events:none;transition:opacity .18s ease}
.drawer-overlay.is-visible{display:block;opacity:1;pointer-events:auto}
.mobile-drawer{display:none;position:fixed;left:0;top:0;bottom:0;z-index:10001;width:min(84vw,320px);background:#fff;transform:translateX(-102%);transition:transform .2s ease;box-shadow:14px 0 36px rgba(16,24,39,.18)}
.mobile-drawer.is-open{transform:translateX(0)}
.drawer-top{height:68px;display:flex;align-items:center;justify-content:space-between;padding:0 16px;border-bottom:1px solid #EDF0F6}
.drawer-close{width:38px;height:38px;border:0;border-radius:50%;background:#ECF0FF;color:#1D2B5F;font-size:25px}
.drawer-scroll{height:calc(100% - 68px);overflow-y:auto;padding:10px 16px 24px}
.drawer-scroll section{padding:10px 0 14px;border-bottom:1px solid #EEF1F6}
.drawer-scroll h2{font-size:13px;color:#7A849B;margin:0 0 8px}
.drawer-scroll a{display:block;text-decoration:none;color:#1D2B5F;font-weight:700;padding:8px 6px;border-radius:8px}
.drawer-scroll a:hover{background:#F3F6FF;color:#597EF7}

@media(max-width:1020px){
.channel-bar{display:none}
.nav-core{gap:2px}
.nav-core a{padding:8px 7px;font-size:13px}
.header-actions .login-link{display:none}
.topic-grid{grid-template-columns:repeat(3,minmax(0,1fr))}
.floating-tools{display:none}
.hero-slider{height:290px}
}

@media(max-width:820px){
body{padding-bottom:62px}
.header-inner{min-height:64px;padding:0 14px;gap:10px}
.site-header{position:sticky}
.nav-core,.header-actions,.channel-bar{display:none}
.menu-toggle,.mobile-register,.mobile-bottom{display:flex}
.mobile-drawer{display:block}
.drawer-overlay{display:none}
.menu-toggle{width:42px;height:42px;align-items:center;justify-content:center;flex-direction:column;gap:4px;border:0;background:transparent;padding:0;flex:0 0 42px}
.menu-toggle span{width:21px;height:2px;background:#1D2B5F;border-radius:2px}
.site-logo{position:absolute;left:50%;transform:translateX(-50%);max-width:42vw}
.site-logo img{height:34px;max-width:145px}
.logo-placeholder{height:34px;min-width:112px;font-size:14px}
.mobile-register{margin-left:auto}
.mobile-bottom{position:fixed;left:0;right:0;bottom:0;z-index:9500;height:58px;background:#fff;border-top:1px solid #E7EBF4;align-items:center;justify-content:space-around}
.mobile-bottom a{flex:1;text-align:center;text-decoration:none;color:#1D2B5F;font-size:13px;font-weight:700}
.section{padding:48px 0}
.page-head{padding:44px 0 26px}
.hero-title{font-size:clamp(28px,8vw,34px)}
.page-lead{font-size:16px}
.hero-slider{height:220px}
.grid-3,.grid-2,.split,.compare-grid,.notice-grid{grid-template-columns:1fr}
.split.reverse .copy,.split.reverse .visual{order:initial}
.topic-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
.footer-grid{grid-template-columns:1fr 1fr}
.footer-bottom{padding-bottom:26px;flex-direction:column}
.compact-links{grid-template-columns:1fr 1fr}
.app-banner{align-items:flex-start;flex-direction:column}
.article h2{font-size:24px}
.copy h2,.index-heading h2{font-size:26px}
.index-heading{align-items:flex-start;flex-direction:column}
.media-wide{min-height:190px;max-height:240px}
}

@media(max-width:460px){
.container,.reading,.footer-grid{width:min(100% - 28px,1200px)}
.header-inner{padding:0 10px}
.mobile-register{min-width:86px;padding:0 11px}
.site-logo img{max-width:128px}
.hero-slider{height:190px}
.hero-prev,.hero-next{width:36px;height:36px}
.topic-grid{gap:12px}
.topic-card{padding:14px;min-height:116px}
.topic-card strong{font-size:16px}
.card{padding:18px}
.footer-grid{grid-template-columns:1fr}
.compact-links{grid-template-columns:1fr}
.observation{flex-direction:column;gap:8px}
.media-card{min-height:150px;max-height:170px}
.media-wide{min-height:180px;max-height:220px}
}

@media(prefers-reduced-motion:reduce){
*{scroll-behavior:auto!important;animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}
}

.noscript-mobile-nav{display:none;background:#fff;border-bottom:1px solid rgba(89,126,247,.14)}
.noscript-inner{padding:12px 14px;display:flex;flex-wrap:wrap;gap:8px}
.noscript-inner a{padding:7px 10px;border-radius:999px;background:#ECF0FF;color:#1D2B5F;text-decoration:none;font-size:13px;font-weight:700}

@media(min-width:1021px){
.site-main{padding-right:68px}
}

@media(max-width:820px){
.noscript-mobile-nav{display:block}
}