/* C3 官网独立样式；不加载到工程师文档。 */

.fernbeam-homepage{color-scheme:dark;--bg:#0B1523;--bg2:#0E1B2B;--bg3:#112237;--card:#15293D;--line:#273D50;--text:#F2F7FC;--sub:#BAC9D7;--muted:#91A6B9;--cyan:#67D5E0;--cyan2:#8AE4E9;--teal:#54B7C7;--grid-gap:24px;--section-space:96px;--section-heading:36px;--font:Inter,"Segoe UI","Microsoft YaHei UI","PingFang SC","Noto Sans CJK SC",sans-serif}
.fernbeam-homepage *{box-sizing:border-box}
.fernbeam-homepage{scroll-behavior:smooth;scroll-padding-top:100px}
.fernbeam-homepage body{margin:0;background:var(--bg);color:var(--text);font-family:var(--font);-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
.fernbeam-homepage a{color:inherit;text-decoration:none}.fernbeam-homepage button{font:inherit;cursor:pointer}
.fernbeam-homepage a:focus-visible,.fernbeam-homepage button:focus-visible{outline:3px solid var(--cyan2);outline-offset:4px}
.fernbeam-homepage ::selection{background:var(--cyan);color:#082333}
.fernbeam-homepage [hidden]{display:none!important}
.fernbeam-homepage .container{width:min(1208px,calc(100% - 96px));margin:auto}
.fernbeam-homepage .icon{width:22px;height:22px;stroke:currentColor;fill:none;stroke-linecap:round;stroke-linejoin:round;stroke-width:1.8;flex:none}
.fernbeam-homepage .icon-sm{width:16px;height:16px}.fernbeam-homepage .icon-lg{width:29px;height:29px}
.fernbeam-homepage .header{position:relative;z-index:10;background:#0A1421;border-bottom:1px solid #243348;height:78px}
.fernbeam-homepage .nav{height:100%;display:flex;align-items:center;gap:40px}
.fernbeam-homepage .brand{display:inline-flex;align-items:center;gap:12px;font-size:24px;letter-spacing:-.8px;font-weight:750;white-space:nowrap}
.fernbeam-homepage .brand-mark{display:grid;place-items:center;width:39px;height:39px;border-radius:11px;background:linear-gradient(130deg,#193347,#132838);color:var(--cyan);border:1px solid #325165}
.fernbeam-homepage .brand-mark svg{width:28px;height:28px}
.fernbeam-homepage .nav-links{margin-left:auto;display:flex;align-items:center;gap:36px}
.fernbeam-homepage .nav-links a{display:inline-flex;align-items:center;min-height:44px;font-size:14px;color:#B6C6D3;font-weight:570;transition:color .18s}
.fernbeam-homepage .nav-links a:hover{color:#F7FEFF}
.fernbeam-homepage .header-actions{display:flex;align-items:center;gap:16px;flex:none}
.fernbeam-homepage .language-switch{display:flex;align-items:center;gap:2px;padding:3px;border:1px solid #35536A;border-radius:10px}
.fernbeam-homepage .language-switch a{display:inline-flex;align-items:center;justify-content:center;min-width:44px;min-height:44px;padding:0 8px;border-radius:6px;color:var(--muted);font-size:14px;font-weight:650;white-space:nowrap;transition:background-color .18s,color .18s}
.fernbeam-homepage .language-switch a[aria-current="page"]{background:#274C60;color:var(--text)}
.fernbeam-homepage .language-switch a:hover{background:#24435A;color:var(--text)}
.fernbeam-homepage .language-switch a:active{background:#1A364B;color:var(--cyan2)}
.fernbeam-homepage .login-btn{display:inline-flex;align-items:center;gap:12px;background:#172B3E;border:1px solid #35536A;border-radius:10px;color:#EAF6FC;font-size:14px;font-weight:700;padding:12px 17px;transition:background .18s,border-color .18s,transform .16s}
.fernbeam-homepage .login-btn:hover{background:#214055;border-color:#5BA0AE}
.fernbeam-homepage .login-btn svg{color:var(--cyan)}
/* HERO: B's centered three-step introduction in C's deep-blue identity. No UI previews/screenshots. */
.fernbeam-homepage .hero{isolation:isolate;overflow:hidden;position:relative;background:#0C1727;padding:80px 0 64px;border-bottom:1px solid rgba(133,176,205,.15)}
.fernbeam-homepage .hero:before{z-index:-3;content:"";position:absolute;inset:0;background:radial-gradient(ellipse 710px 425px at 50% 24%,rgba(24,107,142,.27),transparent 78%),radial-gradient(ellipse 500px 440px at 7% 73%,rgba(28,70,105,.16),transparent 77%),radial-gradient(ellipse 590px 390px at 97% 65%,rgba(15,84,110,.17),transparent 76%)}
.fernbeam-homepage .hero:after{z-index:-2;content:"";position:absolute;inset:0;background-image:radial-gradient(rgba(116,189,214,.24) .75px,transparent .8px);background-size:23px 23px;mask-image:linear-gradient(to bottom,transparent 5%,rgba(0,0,0,.45) 15%,rgba(0,0,0,.2) 65%,transparent 100%);opacity:.42}
.fernbeam-homepage .hero-arc{pointer-events:none;position:absolute;z-index:-1;left:50%;top:-394px;transform:translateX(-50%);width:1160px;height:710px;border:1px solid rgba(82,174,198,.1);border-radius:50%;box-shadow:0 0 0 70px rgba(74,142,173,.022),0 0 0 148px rgba(79,154,181,.016)}
.fernbeam-homepage .hero-top{text-align:center;position:relative}
.fernbeam-homepage .eyebrow{display:inline-flex;align-items:center;gap:9px;padding:7px 13px 7px 11px;border:1px solid rgba(89,189,209,.26);background:rgba(42,120,147,.11);border-radius:30px;color:#93DEE9;font-size:13px;letter-spacing:1.1px;font-weight:650}
.fernbeam-homepage .eyebrow-dot{display:inline-block;width:6px;height:6px;background:#6CD5E0;border-radius:50%;box-shadow:0 0 0 4px rgba(108,213,224,.1)}
.fernbeam-homepage .hero h1{font-size:clamp(52px,4.65vw,66px);font-weight:780;letter-spacing:-.035em;line-height:1.21;margin:25px auto 24px;max-width:990px;text-wrap:balance}
.fernbeam-homepage .hero h1 strong{font-weight:inherit;background:linear-gradient(95deg,#8BE8ED,#5CD1E4 55%,#9CE5F3);background-clip:text;-webkit-background-clip:text;color:transparent}
.fernbeam-homepage .hero-desc{font-size:18px;line-height:1.85;color:#BCCBD8;max-width:750px;margin:0 auto;text-align:center}
.fernbeam-homepage .hero-actions{display:flex;align-items:center;justify-content:center;gap:14px;margin-top:29px}
.fernbeam-homepage .primary-btn,.fernbeam-homepage .secondary-btn{height:51px;display:inline-flex;align-items:center;justify-content:center;gap:16px;padding:0 25px;border-radius:10px;font-size:15px;font-weight:740;white-space:nowrap;transition:transform .18s,background .18s,border-color .18s}
.fernbeam-homepage .primary-btn{background:#66D4E1;color:#082333;box-shadow:0 13px 38px rgba(28,168,199,.17)}
.fernbeam-homepage .primary-btn:hover{background:#8AE8EF;transform:translateY(-2px)}
.fernbeam-homepage .secondary-btn{border:1px solid #35516A;background:rgba(23,43,61,.68);color:#ECF7FC}
.fernbeam-homepage .secondary-btn:hover{background:#24435A;border-color:#5F8DA4;transform:translateY(-2px)}
.fernbeam-homepage .primary-btn:active{background:#53C5D2;transform:translateY(1px)}
.fernbeam-homepage .secondary-btn:active,.fernbeam-homepage .login-btn:active{background:#1A364B;border-color:#67A0B4;transform:translateY(1px)}
.fernbeam-homepage .nav-links a:active,.fernbeam-homepage .brand:active,.fernbeam-homepage .top-link:active{color:var(--cyan)}
.fernbeam-homepage .hero-highlights{display:flex;align-items:center;justify-content:center;gap:22px;margin-top:25px;color:#9CB3C6;font-size:13px}
.fernbeam-homepage .hero-highlights span{display:inline-flex;gap:7px;align-items:center}
.fernbeam-homepage .hero-highlights span:before{content:"";width:5px;height:5px;border-radius:50%;background:#56C3D1;opacity:.86}
.fernbeam-homepage .hero-highlights span+span:after{content:"";position:relative}
.fernbeam-homepage .flow-wrap{position:relative;margin:48px auto 0}
.fernbeam-homepage .flow-heading{display:flex;align-items:center;gap:16px;margin:0 0 16px;color:var(--muted);font-size:13px;letter-spacing:1.1px;font-weight:650}
.fernbeam-homepage .flow-heading:after{content:"";height:1px;flex:1;background:linear-gradient(90deg,rgba(110,162,187,.34),transparent)}
/* 首屏与优势共用三列；不再由外层面板叠加一套缩进。 */
.fernbeam-homepage .flow-panel{position:relative;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:var(--grid-gap)}
.fernbeam-homepage .flow-item{position:relative;min-height:184px;display:flex;flex-direction:column;align-items:flex-start;padding:28px;border-radius:12px;background:linear-gradient(137deg,#172E44,#152A3E);border:1px solid rgba(94,149,175,.15);overflow:hidden}
.fernbeam-homepage .flow-item:nth-child(2){background:linear-gradient(135deg,#182E45,#162C40)}
.fernbeam-homepage .flow-item:nth-child(3){background:linear-gradient(135deg,#152D40,#142F3B)}
.fernbeam-homepage .flow-item:after{content:"";position:absolute;top:0;left:0;width:100%;height:2px;background:linear-gradient(90deg,#69CBDE,transparent 80%);opacity:.63}
.fernbeam-homepage .flow-item .step-top{display:flex;align-items:center;justify-content:space-between;width:100%;margin-bottom:20px}
.fernbeam-homepage .step-icon{width:40px;height:40px;display:grid;place-items:center;border-radius:10px;background:#20465C;color:#74DDE5}
.fernbeam-homepage .step-index{color:var(--muted);font-size:13px;font-weight:650;letter-spacing:1.15px}
.fernbeam-homepage .flow-item h2{font-weight:740;margin:0 0 8px;font-size:20px;line-height:1.4;letter-spacing:-.4px}
.fernbeam-homepage .flow-item p{font-size:14px;color:var(--sub);line-height:1.8;margin:0}
.fernbeam-homepage .between{position:absolute;z-index:2;top:50%;display:grid;place-items:center;transform:translate(-50%,-50%);background:#122739;border:1px solid #40677D;color:#79DCE5;width:30px;height:30px;border-radius:50%;box-shadow:0 0 0 5px rgba(18,38,56,.87)}
.fernbeam-homepage .between.one{left:calc(100% / 3 - var(--grid-gap) / 6)}.fernbeam-homepage .between.two{left:calc(200% / 3 + var(--grid-gap) / 6)}
.fernbeam-homepage .between svg{width:16px;height:16px}
.fernbeam-homepage .flow-footnote{text-align:center;color:var(--muted);font-size:13px;letter-spacing:.25px;margin:16px 0 0}
/* Common section system */
.fernbeam-homepage .section{padding:var(--section-space) 0}
.fernbeam-homepage .section-dark{background:#0B1523}.fernbeam-homepage .section-medium{background:linear-gradient(180deg,#101E2F,#0D1A2A)}
.fernbeam-homepage .kicker{display:inline-block;font-size:13px;letter-spacing:1.8px;color:var(--cyan);font-weight:700}
.fernbeam-homepage .section-lead{margin-bottom:32px}.fernbeam-homepage .section-lead h2{font-size:var(--section-heading);line-height:1.4;letter-spacing:-.025em;margin:16px 0;font-weight:770}
.fernbeam-homepage .section-lead p{max-width:690px;font-size:16px;line-height:1.85;color:var(--sub);margin:0}
.fernbeam-homepage .benefits{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:var(--grid-gap)}
.fernbeam-homepage .benefit{position:relative;min-height:244px;padding:28px;background:linear-gradient(155deg,#182D42,#15283B);border:1px solid #2A4053;border-radius:13px;overflow:hidden}
.fernbeam-homepage .benefit:before{position:absolute;content:"";width:105px;height:105px;background:radial-gradient(circle,rgba(96,196,220,.09),transparent 70%);right:-20px;top:-27px}
.fernbeam-homepage .benefit-icon{height:40px;width:40px;border-radius:11px;display:grid;place-items:center;background:#224459;color:#79D8E2}
.fernbeam-homepage .benefit h3{font-size:20px;line-height:1.4;margin:20px 0 8px;font-weight:740}.fernbeam-homepage .benefit p{font-size:14px;line-height:1.8;color:var(--sub);margin:0}
.fernbeam-homepage .benefit em{position:absolute;bottom:0;left:29px;width:42px;height:2px;background:#5CC8D7;opacity:.8}
/* Capabilities stay concise and avoid internal details. */
.fernbeam-homepage .cap-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:0;border:1px solid #2A3F52;border-radius:14px;overflow:hidden;background:#142537}
.fernbeam-homepage .cap-item{min-height:181px;padding:28px 24px;border-right:1px solid #2A3F52;position:relative}
.fernbeam-homepage .cap-item:last-child{border-right:0}
.fernbeam-homepage .cap-top{display:flex;align-items:center;justify-content:space-between;color:#76D6E1;margin-bottom:28px}
.fernbeam-homepage .cap-num{font-size:13px;letter-spacing:1.3px;color:#73A2B6;font-weight:790}
.fernbeam-homepage .cap-item h3{font-size:20px;line-height:1.4;margin:0 0 8px}.fernbeam-homepage .cap-item p{margin:0;color:var(--sub);font-size:14px;line-height:1.8}
/* Convenience emphasized through lightness, not UI screenshots. */
.fernbeam-homepage .customer{padding:var(--section-space) 0;background:radial-gradient(ellipse 460px 280px at 80% 70%,rgba(43,109,137,.12),transparent 80%),linear-gradient(135deg,#163048,#11263B);border-top:1px solid #2B4C62;border-bottom:1px solid #2B4C62}
.fernbeam-homepage .customer-inner{display:grid;grid-template-columns:1.2fr .8fr;align-items:center;gap:95px}
.fernbeam-homepage .customer h2{font-size:var(--section-heading);line-height:1.4;margin:16px 0;letter-spacing:-.025em}.fernbeam-homepage .customer p{color:var(--sub);line-height:1.85;font-size:16px;max-width:600px;margin:0}
.fernbeam-homepage .customer-list{display:flex;flex-direction:column;gap:13px}
.fernbeam-homepage .customer-list div{display:flex;align-items:center;gap:15px;background:rgba(13,29,45,.62);border:1px solid #35516B;border-radius:11px;padding:18px 21px;color:#DBE8F2;font-weight:640;font-size:14px}
.fernbeam-homepage .customer-list .icon{color:#78DBDB;width:19px;height:19px}
.fernbeam-homepage .scenes{display:grid;grid-template-columns:repeat(3,1fr);gap:0;border-top:1px solid #2C4053;border-bottom:1px solid #2C4053}
.fernbeam-homepage .scene{padding:27px 28px 34px;border-right:1px solid #2C4053}.fernbeam-homepage .scene:first-child{padding-left:0}.fernbeam-homepage .scene:last-child{border:0;padding-right:0}
.fernbeam-homepage .scene-code{color:#73D0D7;font-weight:740;letter-spacing:1.5px;font-size:13px}
.fernbeam-homepage .scene h3{font-size:20px;line-height:1.4;margin:20px 0 8px}.fernbeam-homepage .scene p{color:var(--sub);font-size:14px;line-height:1.8;margin:0}
.fernbeam-homepage .closing{padding:80px 0;background:#0A1421;border-top:1px solid #21364A}
.fernbeam-homepage .closing-inner{display:flex;align-items:center;justify-content:space-between;gap:40px}
.fernbeam-homepage .closing h2{font-size:32px;letter-spacing:-.025em;line-height:1.4;margin:16px 0}
.fernbeam-homepage .closing p{font-size:16px;color:var(--sub);margin:0}
.fernbeam-homepage .closing-links{display:flex;gap:20px;align-items:center}.fernbeam-homepage .closing-links .login-btn{padding:13px 18px}
.fernbeam-homepage .top-link{display:inline-flex;align-items:center;min-height:44px;color:var(--muted);font-size:13px;white-space:nowrap}.fernbeam-homepage .top-link:hover{color:var(--cyan)}
.fernbeam-homepage .footer{border-top:1px solid #223348;background:#08121F;padding:24px 0;font-size:13px;color:var(--muted)}
.fernbeam-homepage .footer-inner{display:flex;gap:20px;align-items:center;justify-content:space-between}
.fernbeam-homepage[lang="en"] .language-switch{display:none}
.fernbeam-homepage[lang="en"] .hero h1{letter-spacing:-.025em}
.fernbeam-homepage[lang="en"] .hero{padding-top:64px}
.fernbeam-homepage[lang="en"] .flow-wrap{margin-top:40px}
.fernbeam-homepage[lang="en"] .flow-item p,.fernbeam-homepage[lang="en"] .benefit p,.fernbeam-homepage[lang="en"] .cap-item p,.fernbeam-homepage[lang="en"] .scene p,.fernbeam-homepage[lang="en"] .customer-list div{font-size:16px;line-height:1.7}
.fernbeam-homepage[lang="en"] .section-lead h2,.fernbeam-homepage[lang="en"] .benefit h3,.fernbeam-homepage[lang="en"] .scene h3{text-wrap:balance}
.fernbeam-homepage[lang="en"] .hero-desc,.fernbeam-homepage[lang="en"] .section-lead p,.fernbeam-homepage[lang="en"] .flow-item p,.fernbeam-homepage[lang="en"] .benefit p,.fernbeam-homepage[lang="en"] .cap-item p,.fernbeam-homepage[lang="en"] .customer p,.fernbeam-homepage[lang="en"] .scene p{text-wrap:pretty}
@media(max-width:1280px){.fernbeam-homepage .container{width:min(1128px,calc(100% - 70px))}}
@media(prefers-reduced-motion:reduce){.fernbeam-homepage{scroll-behavior:auto}.fernbeam-homepage .primary-btn,.fernbeam-homepage .secondary-btn,.fernbeam-homepage .login-btn,.fernbeam-homepage .language-switch a{transition:none}.fernbeam-homepage .primary-btn:hover,.fernbeam-homepage .secondary-btn:hover,.fernbeam-homepage .login-btn:hover,.fernbeam-homepage .primary-btn:active,.fernbeam-homepage .secondary-btn:active,.fernbeam-homepage .login-btn:active{transform:none}}

.fernbeam-homepage .icon-definitions{position:absolute;width:0;height:0;overflow:hidden}
.fernbeam-homepage .skip-link{position:absolute;z-index:20;left:24px;top:12px;padding:12px 18px;background:#67D5E0;color:#082333;border-radius:8px;transform:translateY(-200%)}
.fernbeam-homepage .skip-link:focus{transform:translateY(0)}