*{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:1.8;overflow-x:hidden}a{color:inherit}img{max-width:100%}button,input{font:inherit}.shell{width:min(1200px,calc(100% - 40px));margin:0 auto}.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;min-width:132px}.site-logo img,.drawer-logo img,.footer-logo img{display:block;height:40px;width:auto;max-width:168px;object-fit:contain}.logo-fallback{font-weight:900;font-size:22px;letter-spacing:.08em;color:#1D2B5F}.logo-fallback-light{color:#fff}.nav-core{display:flex;align-items:center;gap:8px;white-space:nowrap;flex-wrap:nowrap}.nav-core a{color:#1D2B5F;padding:8px 10px;border-radius:999px;font-weight:700;text-decoration:none}.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;white-space:nowrap}.header-login{font-weight:700;text-decoration:none;color:#1D2B5F}.mobile-register,.menu-toggle{display:none}.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:#FFF;border-radius:999px;text-decoration:none;font-weight:700;box-shadow:0 10px 24px rgba(89,126,247,.28);border:0}.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-bottom:1px solid rgba(89,126,247,.12)}.channel-inner{max-width:1200px;margin:0 auto;padding:8px 20px;display:flex;gap:4px;overflow-x:auto;white-space:nowrap;scrollbar-width:thin}.channel-inner a{color:#5B647A;text-decoration:none;padding:7px 9px;border-radius:10px;font-size:14px}.channel-inner a:hover{color:#597EF7;background:#F6F8FF}.site-main{min-height:60vh}.hero-wrap{padding:30px 0 16px}.hero-slider{position:relative;height:360px;background:#101827;border-radius:18px;overflow:hidden;box-shadow:0 16px 40px rgba(89,126,247,.10)}.hero-slide{position:absolute;inset:0;opacity:0;pointer-events:none;transition:opacity .35s ease;display:flex;align-items:center;justify-content:center}.hero-media{position:absolute;inset:0;width:100%;height:100%}.hero-media img{width:100%;height:100%;object-fit:contain;object-position:center;display:block}.hero-slide.is-active{opacity:1;pointer-events:auto}.hero-slide img{width:100%;height:100%;object-fit:contain;object-position:center}.hero-slide .media-placeholder{position:absolute;inset:24px;background:linear-gradient(135deg,#1a2744,#26395f);border-radius:14px}.hero-copy{position:absolute;left:34px;bottom:30px;max-width:520px;background:rgba(16,24,39,.78);color:#fff;padding:18px 20px;border-radius:14px;backdrop-filter:blur(8px)}.hero-copy h1,.hero-copy h2{margin:0 0 8px;font-size:clamp(28px,4vw,46px);line-height:1.2}.hero-copy p{margin:0;color:#E8EDFF}.hero-arrow{position:absolute;top:50%;transform:translateY(-50%);width:42px;height:42px;border-radius:50%;border:1px solid rgba(255,255,255,.5);background:rgba(16,24,39,.56);color:#fff;z-index:4;cursor:pointer}.hero-arrow.prev{left:16px}.hero-arrow.next{right:16px}.hero-dots{position:absolute;left:0;right:0;bottom:12px;display:flex;justify-content:center;gap:8px;z-index:5}.hero-dot{width:10px;height:10px;border-radius:50%;border:0;background:rgba(255,255,255,.45);padding:0;cursor:pointer}.hero-dot.is-active{background:#fff}.quick-pills{padding:14px 0 0;display:flex;gap:10px;overflow-x:auto;white-space:nowrap}.quick-pills a{flex:0 0 auto;text-decoration:none;background:#fff;border:1px solid rgba(89,126,247,.16);color:#1D2B5F;padding:8px 14px;border-radius:999px;font-weight:700}.observe-strip{margin:30px auto;background:linear-gradient(135deg,#fff,#ECF0FF);border:1px solid rgba(89,126,247,.16);border-radius:16px;padding:22px 26px;color:#37415f}.observe-strip strong{color:#1D2B5F}.section{padding:56px 0}.section.compact{padding:36px 0}.section-head{display:flex;align-items:end;justify-content:space-between;gap:16px;margin-bottom:24px}.section-head h2{margin:0;color:#1D2B5F;font-size:clamp(26px,3vw,34px);line-height:1.25}.section-head p{margin:0;color:#5B647A;max-width:680px}.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.topic-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}.info-panel,.topic-card,.faq-item,.step-item,.path-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,.07)}.info-panel,.path-card{padding:24px}.info-panel h3,.path-card h3,.topic-card h3{margin:0 0 10px;color:#1D2B5F}.info-panel p,.path-card p,.topic-card p{margin:0;color:#5B647A}.topic-card{padding:20px;text-decoration:none;transition:transform .18s ease,box-shadow .18s ease}.topic-card:hover{transform:translateY(-3px);box-shadow:0 18px 44px rgba(89,126,247,.12)}.topic-card small{display:block;color:#597EF7;font-weight:700;margin-top:12px}.split{display:grid;grid-template-columns:1.05fr .95fr;gap:28px;align-items:center}.split.reverse{grid-template-columns:.95fr 1.05fr}.split.reverse .media{order:2}.split-copy h2{color:#1D2B5F;font-size:clamp(28px,3.3vw,40px);line-height:1.25;margin:0 0 16px}.split-copy p{font-size:17px;color:#37415f;margin:0 0 14px}.text-links{display:flex;flex-wrap:wrap;gap:12px;margin-top:20px}.text-link{color:#597EF7;text-decoration:none;font-weight:700}.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-placeholder{display:block;width:100%;height:100%;background:linear-gradient(135deg,#ECF0FF 0%,#EAF7FF 100%)}.app-banner{background:linear-gradient(135deg,#1D2B5F,#3659a8);color:#fff;border-radius:18px;padding:30px;display:flex;align-items:center;justify-content:space-between;gap:22px}.app-banner h2{margin:0 0 8px}.app-banner p{margin:0;color:#E8EDFF;max-width:780px}.safe-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}.note-box{padding:24px}.note-box h3{margin:0 0 10px;color:#1D2B5F}.note-box p{margin:0;color:#5B647A}.faq-list{display:grid;gap:12px}.faq-item{padding:20px 22px}.faq-item h3{margin:0 0 8px;color:#1D2B5F;font-size:18px}.faq-item p{margin:0;color:#5B647A}.page-hero{padding:64px 0 36px;background:linear-gradient(180deg,#ECF0FF 0%,#F6F8FF 100%)}.page-hero .shell{max-width:1000px}.eyebrow{display:inline-flex;color:#597EF7;font-weight:800;letter-spacing:.08em;margin-bottom:12px}.page-hero h1{margin:0;color:#1D2B5F;font-size:clamp(32px,5vw,50px);line-height:1.2}.page-hero p{margin:16px 0 0;color:#5B647A;font-size:18px;max-width:820px}.article{width:min(880px,calc(100% - 40px));margin:0 auto;padding:48px 0 70px}.article.wide{width:min(1100px,calc(100% - 40px))}.article h2{color:#1D2B5F;font-size:30px;line-height:1.3;margin:42px 0 14px}.article h3{color:#1D2B5F;font-size:21px;margin:28px 0 10px}.article p{font-size:17px;margin:0 0 18px}.article ul,.article ol{padding-left:1.25em}.article li{margin:8px 0}.lead{font-size:19px!important;color:#37415f}.toc{background:#fff;border:1px solid rgba(89,126,247,.16);border-radius:18px;padding:22px;margin:24px 0}.toc strong{color:#1D2B5F}.toc a{color:#597EF7;text-decoration:none;margin-right:14px}.steps{display:grid;gap:14px;margin:22px 0}.step-item{padding:20px 22px;display:grid;grid-template-columns:auto 1fr;gap:14px}.step-num{width:34px;height:34px;border-radius:50%;display:inline-flex;align-items:center;justify-content:center;background:#ECF0FF;color:#597EF7;font-weight:900}.compare{display:grid;grid-template-columns:1fr 1fr;gap:18px}.reading-path{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin:22px 0}.topic-image{margin:26px 0}.topic-image .media{height:240px;aspect-ratio:auto}.floating-tools{position:fixed;right:12px;top:50%;transform:translateY(-50%);z-index:9000;display:flex;flex-direction:column;gap:8px;width:106px}.floating-tools>a,.floating-tools>button{background:#fff;color:#1D2B5F;border:1px solid rgba(89,126,247,.18);border-radius:12px;text-decoration:none;text-align:center;padding:10px 8px;font-weight:700;box-shadow:0 10px 24px rgba(89,126,247,.12);cursor:pointer}.floating-tools .main-btn{height:42px;color:#fff;border-radius:999px;padding:0 8px}.site-footer{background:#1F1F1F;color:#D7DCE8;padding:52px 0 26px}.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 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{margin-bottom:14px}.footer-bottom{border-top:1px solid rgba(255,255,255,.12);margin-top:34px;padding-top:18px;display:flex;justify-content:space-between;gap:20px;font-size:14px}.footer-bottom p{margin:0}.mobile-bottom{display:none}.mobile-drawer,.drawer-mask{display:none}
@media(max-width:1120px){.nav-core{gap:2px}.nav-core a{padding:8px 7px;font-size:14px}.header-inner{gap:10px}.floating-tools{display:none}.topic-grid{grid-template-columns:repeat(3,1fr)}}
@media(max-width:980px){.channel-bar,.nav-core,.header-actions{display:none}.header-inner{min-height:64px;padding:0 14px;display:grid;grid-template-columns:1fr auto 1fr;gap:10px}.menu-toggle{display:flex;flex-direction:column;justify-content:center;gap:4px;width:42px;height:42px;border:0;background:transparent;padding:8px;justify-self:start}.menu-toggle span{display:block;height:2px;background:#1D2B5F;border-radius:2px}.site-logo{justify-self:center;min-width:0}.site-logo img{height:36px;max-width:146px}.mobile-register{display:inline-flex;justify-self:end;height:40px;min-width:90px;padding:0 14px}.site-main{padding-bottom:70px}.mobile-drawer{display:block;position:fixed;inset:0 auto 0 0;width:min(84vw,320px);background:#fff;z-index:12000;transform:translateX(-105%);transition:transform .2s ease;box-shadow:18px 0 40px rgba(29,43,95,.18)}.mobile-drawer.is-open{transform:translateX(0)}.drawer-mask{display:none;position:fixed;inset:0;background:rgba(16,24,39,.42);z-index:11000;opacity:0;pointer-events:none;transition:opacity .18s ease}.drawer-mask.is-visible{display:block;opacity:1;pointer-events:auto}.drawer-open{overflow:hidden}.drawer-head{height:68px;padding:0 16px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid #ECF0FF}.drawer-logo img{height:34px}.drawer-close{width:40px;height:40px;border:0;background:#F6F8FF;border-radius:50%;color:#1D2B5F;font-size:28px;line-height:1}.drawer-scroll{height:calc(100vh - 68px);overflow-y:auto;padding:16px 18px 28px}.drawer-scroll section{margin-bottom:20px}.drawer-scroll h2{font-size:14px;color:#597EF7;margin:0 0 8px}.drawer-links{display:grid;grid-template-columns:1fr 1fr;gap:8px}.drawer-links a{text-decoration:none;background:#F6F8FF;padding:10px 12px;border-radius:10px;color:#1D2B5F}.mobile-bottom{position:fixed;left:0;right:0;bottom:0;z-index:9500;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,.08)}.mobile-bottom a{text-decoration:none;text-align:center;padding:12px 4px;color:#1D2B5F;font-weight:700;font-size:14px}.grid-3{grid-template-columns:1fr 1fr}.split,.split.reverse{grid-template-columns:1fr}.split.reverse .media{order:0}.reading-path{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr 1fr}.footer-bottom{flex-direction:column}.hero-slider{height:280px}.hero-copy{left:20px;right:20px;bottom:22px}.hero-copy h1,.hero-copy h2{font-size:30px}}
@media(max-width:640px){.topic-image .media{height:220px}.shell,.article,.article.wide{width:min(100% - 28px,1200px)}.hero-wrap{padding-top:18px}.hero-slider{height:210px;border-radius:16px}.hero-copy{left:14px;right:14px;bottom:34px;padding:12px 14px}.hero-copy h1,.hero-copy h2{font-size:27px}.hero-copy p{font-size:13px;line-height:1.5}.hero-arrow{width:36px;height:36px}.hero-arrow.prev{left:8px}.hero-arrow.next{right:8px}.section{padding:44px 0}.observe-strip{margin-top:22px;padding:18px}.grid-3,.safe-grid,.compare{grid-template-columns:1fr}.topic-grid{grid-template-columns:repeat(2,1fr);gap:12px}.topic-card{padding:16px}.section-head{align-items:flex-start;flex-direction:column}.app-banner{align-items:flex-start;flex-direction:column;padding:22px}.page-hero{padding:42px 0 26px}.page-hero h1{font-size:32px}.page-hero p{font-size:16px}.article{padding:34px 0 54px}.article h2{font-size:26px;margin-top:34px}.article p{font-size:16px}.footer-grid{grid-template-columns:1fr}.site-footer{padding-bottom:88px}.site-logo img{max-width:132px}.mobile-register{min-width:86px;font-size:14px;padding:0 12px}.media{border-radius:14px}}
/* ===== 2026-09-22 批量修复：注册入口可见性 ===== */
.main-btn,
a.main-btn,
.header-actions .main-btn,
.mobile-register,
.hero-actions .main-btn,
.hero-actions a,
.slider-register,
.carousel-register {
position: relative !important;
display: inline-flex !important;
align-items: center !important;
justify-content: center !important;
min-width: 96px !important;
min-height: 42px !important;
padding: 0 20px !important;
border: 0 !important;
border-radius: 999px !important;
background: linear-gradient(135deg,#7580EE 0%,#597EF7 48%,#7AC4F5 100%) !important;
color: #fff !important;
-webkit-text-fill-color: #fff !important;
font-size: 15px !important;
font-weight: 700 !important;
line-height: 42px !important;
text-indent: 0 !important;
opacity: 1 !important;
visibility: visible !important;
overflow: visible !important;
text-decoration: none !important;
white-space: nowrap !important;
z-index: 20 !important;
box-shadow: 0 10px 24px rgba(89,126,247,.28) !important;
}
.main-btn::before,
.main-btn::after {
pointer-events: none !important;
}
.hero-actions,
.slide-actions,
.slider-actions,
.banner-actions {
display: flex !important;
visibility: visible !important;
opacity: 1 !important;
position: relative !important;
z-index: 30 !important;
gap: 12px !important;
}
.hero-actions a,
.slide-actions a,
.slider-actions a,
.banner-actions a {
font-size: 15px !important;
color: #fff !important;
-webkit-text-fill-color: #fff !important;
}
/* 图片绝不能透明或隐藏 */
.media img,
.hero-slider img,
.slider img,
.carousel img,
.slide img,
.banner img {
display: block !important;
visibility: visible !important;
opacity: 1 !important;
max-width: 100% !important;
object-fit: contain !important;
object-position: center !important;
}
/* 手机菜单关闭时绝不能用透明遮罩盖住按钮 */
.drawer-mask {
pointer-events: none !important;
}
.drawer-mask.is-visible {
pointer-events: auto !important;
}
@media(max-width:980px){
.mobile-register {
display: inline-flex !important;
visibility: visible !important;
opacity: 1 !important;
font-size: 14px !important;
min-width: 82px !important;
padding: 0 14px !important;
}
}
/* ===== 注册入口去重修复 ===== */
/* 电脑端绝对隐藏手机注册按钮 */
.mobile-register{
display:none !important;
}
/* 删除上一轮误加到轮播中的注册入口 */
.slider-register,
.slide-actions .slider-register,
.hero-slider .slider-register,
.hero-carousel .slider-register,
.home-slider .slider-register{
display:none !important;
}
/* 电脑端只显示正常桌面注册 */
.desktop-register{
display:inline-flex !important;
}
/* 手机端：隐藏桌面按钮，只保留顶部一个注册入口 */
@media(max-width:980px){
.desktop-register{
display:none !important;
}
.mobile-register{
display:inline-flex !important;
align-items:center !important;
justify-content:center !important;
}
}
/* ===== FINAL REGISTER FIX ===== */
/* 电脑顶部 */
.header-actions{
display:flex !important;
align-items:center !important;
gap:10px !important;
}
.header-actions .login-link{
display:inline-flex !important;
align-items:center !important;
justify-content:center !important;
color:#1D2B5F !important;
font-weight:700 !important;
text-decoration:none !important;
white-space:nowrap !important;
}
.header-actions .desktop-register{
display:inline-flex !important;
}
/* 手机按钮电脑端绝对隐藏 */
.header-actions .mobile-register{
display:none !important;
}
/* 轮播只保留这一个注册入口 */
.carousel-register{
position:absolute !important;
left:50% !important;
bottom:58px !important;
transform:translateX(-50%) !important;
z-index:50 !important;
display:inline-flex !important;
align-items:center !important;
justify-content:center !important;
width:auto !important;
min-width:112px !important;
height:44px !important;
padding:0 22px !important;
border-radius:999px !important;
background:linear-gradient(135deg,#7580EE 0%,#597EF7 48%,#7AC4F5 100%) !important;
color:#fff !important;
-webkit-text-fill-color:#fff !important;
text-decoration:none !important;
font-weight:800 !important;
font-size:16px !important;
box-shadow:
0 10px 24px rgba(89,126,247,.35),
0 0 20px rgba(122,196,245,.35) !important;
}
/* 旧的错误按钮全部隐藏 */
.slider-register,
.slide-actions .slider-register,
.hero-actions .slider-register{
display:none !important;
}
/* 手机 */
@media(max-width:980px){
.header-actions .login-link,
.header-actions .desktop-register{
display:none !important;
}
.header-actions .mobile-register{
display:inline-flex !important;
align-items:center !important;
justify-content:center !important;
min-width:88px !important;
height:40px !important;
padding:0 13px !important;
}
.carousel-register{
bottom:42px !important;
min-width:96px !important;
height:40px !important;
padding:0 16px !important;
font-size:14px !important;
}
}
/* ===== TOPIC IMAGE CARDS FINAL START ===== */
.topic-grid{
align-items:stretch;
}
.topic-card.topic-card-photo{
padding:0 !important;
overflow:hidden !important;
display:block !important;
min-height:0 !important;
background:#fff !important;
border:1px solid rgba(89,126,247,.16) !important;
border-radius:18px !important;
text-decoration:none !important;
box-shadow:0 12px 30px rgba(89,126,247,.08) !important;
transition:transform .18s ease, box-shadow .18s ease !important;
}
.topic-card.topic-card-photo:hover{
transform:translateY(-3px);
box-shadow:0 18px 36px rgba(89,126,247,.14) !important;
}
.topic-card .topic-thumb{
display:block !important;
position:relative !important;
width:100% !important;
aspect-ratio:16/9 !important;
overflow:hidden !important;
background:#ECF0FF !important;
border-radius:0 !important;
padding:0 !important;
margin:0 !important;
}
.topic-card .topic-thumb img{
display:block !important;
width:100% !important;
height:100% !important;
max-width:100% !important;
object-fit:contain !important;
object-position:center center !important;
opacity:1 !important;
visibility:visible !important;
}
.topic-card .topic-image-missing{
display:block !important;
position:absolute !important;
inset:0 !important;
background:linear-gradient(135deg,#ECF0FF,#EAF7FF) !important;
}
.topic-card .topic-copy{
display:block !important;
padding:17px 18px 20px !important;
background:#fff !important;
}
.topic-card .topic-copy strong{
display:block !important;
margin:0 0 8px !important;
color:#1D2B5F !important;
font-size:19px !important;
line-height:1.4 !important;
}
.topic-card .topic-copy > span{
display:block !important;
color:#5B647A !important;
font-size:14px !important;
line-height:1.7 !important;
}
/* 电脑四列 */
@media(min-width:981px){
.topic-grid{
grid-template-columns:repeat(4,minmax(0,1fr)) !important;
}
}
/* 平板三列 */
@media(max-width:980px) and (min-width:641px){
.topic-grid{
grid-template-columns:repeat(3,minmax(0,1fr)) !important;
}
}
/* 手机两列 */
@media(max-width:640px){
.topic-grid{
grid-template-columns:repeat(2,minmax(0,1fr)) !important;
gap:12px !important;
}
.topic-card .topic-copy{
padding:13px 13px 16px !important;
}
.topic-card .topic-copy strong{
font-size:16px !important;
}
.topic-card .topic-copy > span{
font-size:13px !important;
}
}
/* ===== TOPIC IMAGE CARDS FINAL END ===== */