:root{--color-primary-dark:#c41103;--color-primary-light:#fc362d;--color-bg:#fef9f5;--color-accent:#fad603;--color-accent-dark:#dc8f03;--color-link:#06f;--color-border:#ebe0d8;--color-text:#333;--color-text-light:#888;--color-text-muted:#aaa;--color-online:#52c41a;--color-busy:#faad14;--color-offline:#bfbfbf;--radius-sm:6px;--radius-md:10px;--radius-lg:16px;--shadow-card:0 2px 12px #0000000f;--shadow-hover:0 8px 30px #ed1f321f;--shadow-nav:0 2px 16px #ed1f3226;--gradient-primary:linear-gradient(135deg, #ed1f32 0%, #c41103 100%);--gradient-hero:linear-gradient(160deg, #ed1f32 0%, #c41103 60%, #a00d02 100%);--transition:all .3s cubic-bezier(.4, 0, .2, 1)}*{box-sizing:border-box;margin:0;padding:0}body{background:var(--color-bg);color:var(--color-text);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;text-rendering:optimizelegibility;font-family:Microsoft YaHei,-apple-system,BlinkMacSystemFont,PingFang SC,sans-serif;line-height:1.6}a{color:inherit;text-decoration:none}ul,li{list-style:none}img{vertical-align:middle;border:0}.clear{clear:both}.main-nav{background:var(--gradient-primary);box-shadow:var(--shadow-nav);z-index:100;position:sticky;top:0}.nav-inner{justify-content:space-between;align-items:center;max-width:1200px;height:64px;margin:0 auto;padding:0 20px;display:flex}.nav-logo{align-items:center;gap:10px;display:flex}.nav-logo .logo-text{color:#fff;letter-spacing:2px;text-shadow:0 2px 4px #00000026;font-size:22px;font-weight:700}.nav-logo .logo-badge{background:var(--color-accent);color:var(--color-primary-dark);letter-spacing:1px;border-radius:10px;padding:2px 8px;font-size:11px;font-weight:700}.nav-menu{align-items:center;gap:28px;display:contents}.nav-menu a{color:#ffffffe6;transition:var(--transition);font-size:15px;font-weight:500;position:relative}.nav-menu a:hover{color:var(--color-accent)}.nav-menu a:hover:after{content:"";background:var(--color-accent);border-radius:1px;height:2px;position:absolute;bottom:-4px;left:0;right:0}.nav-cta{align-items:center;gap:12px;display:flex}.nav-cta .btn-login{color:#fff;transition:var(--transition);border:1px solid #ffffff80;border-radius:20px;padding:6px 18px;font-size:14px}.nav-cta .btn-login:hover{background:#ffffff26;border-color:#fff}.nav-cta .btn-register{background:var(--color-accent);color:var(--color-primary-dark);transition:var(--transition);border-radius:20px;padding:6px 18px;font-size:14px;font-weight:700}.nav-cta .btn-register:hover{background:#ffe800;transform:scale(1.05)}.nav-cta .btn-service{color:#fff;transition:var(--transition);border:1px solid #ffffff59;border-radius:20px;align-items:center;gap:4px;padding:6px 14px;font-size:13px;text-decoration:none;display:inline-flex}.nav-cta .btn-service:before{content:"💬";font-size:14px}.nav-cta .btn-service:hover{background:#ffffff26;border-color:#fff}.hero-section{background:var(--gradient-hero);padding:36px 0 32px;position:relative;overflow:hidden}.hero-section:before{content:"";pointer-events:none;background:radial-gradient(circle,#fad6031f 0%,#0000 70%);width:400px;height:400px;position:absolute;top:-50%;right:-10%}.hero-inner{z-index:1;max-width:1200px;margin:0 auto;padding:0 20px;position:relative}.hero-title{color:#fff;letter-spacing:3px;text-shadow:0 2px 8px #0003;margin-bottom:8px;font-size:28px;font-weight:700}.hero-subtitle{color:#ffffffd9;letter-spacing:1px;margin-bottom:20px;font-size:14px}.hero-tags{flex-wrap:wrap;gap:12px;display:flex}.hero-tag{color:#fff;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);transition:var(--transition);background:#ffffff1f;border:1px solid #fff3;border-radius:20px;padding:5px 14px;font-size:13px}.hero-tag:hover{background:#fff3;border-color:#fff6}.hero-tag .dot{background:var(--color-accent);vertical-align:middle;border-radius:50%;width:6px;height:6px;margin-right:6px;display:inline-block}.page-body{max-width:1200px;margin:0 auto;padding:0 20px 40px}.breadcrumb{color:var(--color-text-light);padding:20px 0 10px;font-size:13px}.breadcrumb a{color:var(--color-primary);transition:var(--transition)}.breadcrumb a:hover{text-decoration:underline}.breadcrumb .sep{color:var(--color-text-muted);margin:0 6px}.breadcrumb .current{color:var(--color-text);font-weight:600}.register-section{justify-content:center;padding:20px 0 40px;display:flex}.register-card{border-radius:var(--radius-lg);contain:layout style;background:#fff;width:100%;max-width:900px;min-height:420px;display:flex;overflow:hidden;box-shadow:0 4px 30px #00000014}.register-card-left{flex:1;padding:40px 40px 30px}.register-card-title{color:var(--color-text);margin-bottom:6px;font-size:24px;font-weight:700}.register-card-subtitle{color:var(--color-text-light);margin-bottom:28px;font-size:13px}.register-errors{border:1px solid #fcc;border-left:4px solid var(--color-primary);border-radius:var(--radius-sm);background:#fff5f5;margin-bottom:20px;padding:12px 20px}.register-errors ul{list-style:none}.register-errors li{color:var(--color-primary);align-items:center;gap:8px;padding:4px 0;font-size:14px;font-weight:600;display:flex}.register-errors li:before{content:"!";background:var(--color-primary);color:#fff;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:18px;height:18px;font-size:12px;font-weight:700;display:inline-flex}.form-group{margin-bottom:18px}.form-label{color:var(--color-text);margin-bottom:6px;font-size:14px;font-weight:600;display:block}.form-label .required{color:var(--color-primary)}.form-hint{color:var(--color-text-muted);margin-top:4px;font-size:12px}.form-input{border:1.5px solid var(--color-border);border-radius:var(--radius-sm);width:100%;height:44px;color:var(--color-text);transition:var(--transition);background:#faf8f6;outline:none;padding:0 16px;font-family:inherit;font-size:15px}.form-input:focus{border-color:var(--color-primary);background:#fff;box-shadow:0 0 0 3px #ed1f3214}.code-row{align-items:center;gap:12px;display:flex}.code-row .form-input{flex:0 0 120px;width:120px}.btn-sendcode{background:var(--gradient-primary);color:#fff;border-radius:var(--radius-sm);cursor:pointer;height:44px;transition:var(--transition);white-space:nowrap;border:none;flex:1;font-family:inherit;font-size:14px;font-weight:600}.btn-sendcode:hover{opacity:.9;box-shadow:0 4px 12px #ed1f324d}.btn-sendcode.disabled{cursor:not-allowed;box-shadow:none;opacity:1;background:#ccc}.form-agreement{color:var(--color-text-light);align-items:center;gap:6px;margin:20px 0 24px;font-size:14px;display:flex}.form-agreement input[type=checkbox]{width:16px;height:16px;accent-color:var(--color-primary);cursor:pointer}.form-agreement a{color:var(--color-primary);cursor:pointer;font-weight:600}.form-agreement a:hover{text-decoration:underline}.btn-submit{background:var(--gradient-primary);color:#fff;border-radius:var(--radius-sm);letter-spacing:2px;cursor:pointer;width:100%;height:46px;transition:var(--transition);border:none;font-family:inherit;font-size:16px;font-weight:700}.btn-submit:hover{opacity:.9;transform:translateY(-1px);box-shadow:0 4px 16px #ed1f3259}.btn-submit:active{transform:translateY(0)}.form-footer{text-align:center;color:var(--color-text-light);margin-top:16px;font-size:13px}.form-footer a{color:var(--color-primary);font-weight:600}.form-footer a:hover{text-decoration:underline}.slider-verify-container{box-sizing:border-box;touch-action:none;-webkit-touch-action:none;background:linear-gradient(#fef9f5 0%,#fff0eb 100%);justify-content:center;align-items:center;width:100%;margin:6px 0 14px;padding-left:auto;padding-right:auto;display:flex;position:relative}.slider-verify{border:1px solid var(--color-border);-webkit-touch-callout:none;-webkit-user-select:none;user-select:none;-khtml-user-select:none;z-index:1000;touch-action:none;-webkit-touch-action:none;box-sizing:border-box;background:linear-gradient(135deg,#fff 0%,#fef9f5 100%);border-radius:27px;width:100%;max-width:320px;height:54px;line-height:54px;transition:all .3s;position:relative;overflow:hidden;box-shadow:0 2px 8px #ed1f320f,inset 0 1px #fffc}.slider-verify:hover{box-shadow:0 4px 12px #ed1f321a,inset 0 1px #ffffffe6}.slider-track{background:var(--gradient-primary);z-index:1;border-radius:27px;width:0;height:100%;transition:width 50ms linear;position:absolute;top:0;left:0}.slider-handle{border:1px solid var(--color-primary-dark);cursor:pointer;z-index:3;text-align:center;color:#fff;box-sizing:border-box;touch-action:none;-webkit-tap-highlight-color:transparent;will-change:transform, left;backface-visibility:hidden;background:linear-gradient(135deg,#ed1f32 0%,#c41103 100%);border-radius:50%;width:54px;height:54px;font-size:20px;font-weight:700;line-height:52px;transition:all .1s;position:absolute;top:0;left:0;transform:translateZ(0);box-shadow:0 2px 8px #ed1f3240,inset 0 -1px #0000000d}.slider-handle:hover{transform:scale(1.05)translateZ(0);box-shadow:0 4px 12px #ed1f3259,inset 0 -1px #00000014}.slider-handle:active{transform:scale(.98)translateZ(0);box-shadow:0 1px 4px #ed1f321a}.slider-text{text-align:center;z-index:2;width:100%;height:100%;color:var(--color-text-light);pointer-events:none;letter-spacing:.5px;font-size:15px;font-weight:500;position:absolute}.slider-success{font-weight:700;color:var(--color-primary)!important}.slider-error{font-weight:700;color:#f56c6c!important}#sendcode.disabled{cursor:not-allowed!important;box-shadow:none!important;opacity:1!important;background:#ccc!important}.ui-popup{z-index:999;margin:0;padding:0;display:none;position:absolute;top:0;left:0}.ui-mask{z-index:998;background-color:#00000080;width:100%;height:100%;display:none;position:fixed;top:0;left:0}.tankuang{border-radius:var(--radius-md);background-color:#fff;margin:0;overflow:hidden;box-shadow:0 8px 30px #0003}.tankuang .div01{text-align:right;background:var(--gradient-primary);height:42px}.tankuang .div01 .l{float:left;color:#fff;margin-left:20px;font-size:14px;font-weight:700;line-height:42px;display:inline}.tankuang .div01 .r{float:right;width:42px;height:42px;display:inline}.tankuang .div01 .r a{background:url(/yixue/images/close.gif) 50% no-repeat;width:42px;height:42px;display:block}.tankuang .div02{margin:0}.tankuang .div03{margin:30px 20px 60px}.tankuang .div03 p{text-align:center;font-size:14px;line-height:36px}.tankuang .div04{margin:20px 30px}.tankuang .div04 p{color:var(--color-primary);font-size:14px;line-height:28px}.xieyi_content{color:#555;height:455px;padding:20px 24px;font-size:13px;line-height:1.9;overflow-y:auto}.xieyi_content h2{text-align:center;color:var(--color-primary);margin-bottom:16px;font-size:18px}.xieyi_content h3{color:var(--color-text);margin-top:16px;margin-bottom:8px;font-size:15px}.footer{background:var(--gradient-primary);color:#fff;content-visibility:auto;contain-intrinsic-size:200px;padding:30px 0 24px}.footer-inner{justify-content:space-between;align-items:flex-start;gap:30px;max-width:1200px;margin:0 auto;padding:0 20px;display:flex}.footer-left{flex:1}.footer-logo{margin-bottom:12px}.footer-links-row{margin-bottom:10px;font-size:13px}.footer-links-row .label{color:var(--color-accent);margin-right:8px;font-weight:600}.footer-links-row a{color:#fffc;transition:var(--transition);margin:0 4px}.footer-links-row a:hover{color:var(--color-accent)}.footer-links-row .sep{color:#ffffff4d;margin:0 2px}.footer-meta{color:#fff9;font-size:12px;line-height:2}.footer-right{text-align:center;flex-shrink:0}@media (width<=768px){.register-card{flex-direction:column;max-width:420px}.register-card-left{padding:30px 24px 24px}.nav-menu,.nav-cta .btn-service{display:none}.hero-title{font-size:22px}.footer-inner{flex-direction:column}.code-row{flex-direction:column;align-items:stretch}.code-row .form-input{flex:1;width:100%}}