:root{--ink:#253039;--muted:#7e746b;--paper:#f5f0e8;--cream:#fffaf3;--line:#ded3c5;--orange:#c9673f;--orange2:#e1a06f;--white:#fff;--max:1180px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--ink);background:var(--paper);font-family:"Microsoft YaHei","PingFang SC",Arial,sans-serif}a{color:inherit;text-decoration:none}img{display:block;width:100%;height:100%;object-fit:cover}.site-header{position:sticky;top:0;z-index:20;height:76px;padding:0 max(24px,calc((100% - var(--max))/2));display:flex;align-items:center;gap:38px;background:rgba(255,250,243,.92);border-bottom:1px solid rgba(222,211,197,.72);backdrop-filter:blur(16px)}.brand{display:flex;align-items:center;gap:11px}.brand-seal{width:41px;height:41px;display:grid;place-items:center;color:#fff;background:var(--orange);border-radius:50%;font-family:serif;font-size:20px}.brand strong,.brand small{display:block}.brand strong{font-family:serif;font-size:18px;letter-spacing:3px}.brand small{margin-top:2px;color:var(--muted);font-size:7px;letter-spacing:1.5px}.main-nav{margin-left:auto;display:flex;gap:26px;font-size:14px}.main-nav a{position:relative;padding:28px 0}.main-nav a:after{content:"";position:absolute;left:0;right:100%;bottom:19px;height:2px;background:var(--orange);transition:.25s}.main-nav a:hover:after{right:0}.header-action,.button{display:inline-flex;align-items:center;justify-content:center;border-radius:24px;transition:.25s}.header-action{padding:10px 18px;color:#fff;background:var(--ink);font-size:13px}.header-action:hover,.button:hover{transform:translateY(-2px)}.menu-button{display:none}.hero{min-height:650px;max-width:var(--max);margin:auto;padding:84px 24px 70px;display:grid;grid-template-columns:1.02fr .98fr;align-items:center;gap:58px}.eyebrow,.section-label{color:var(--orange);font-size:11px;font-weight:700;letter-spacing:4px}.hero h1{margin:20px 0 24px;font-family:serif;font-size:64px;line-height:1.17;letter-spacing:2px}.hero h1 em{color:var(--orange);font-style:normal}.hero-intro{max-width:570px;color:var(--muted);font-size:17px;line-height:1.9}.hero-actions{margin-top:34px;display:flex;gap:13px}.button{padding:14px 25px;font-size:14px}.button.primary{color:#fff;background:var(--orange)}.button.ghost{border:1px solid var(--ink)}.hero-notes{margin-top:45px;display:flex;gap:24px;color:var(--muted);font-size:12px}.hero-notes span:before{content:"";display:inline-block;width:6px;height:6px;margin-right:8px;background:var(--orange);border-radius:50%}.hero-visual{position:relative;height:470px}.visual-card{position:absolute;box-shadow:0 30px 55px rgba(75,54,38,.18)}.main-card{inset:12px 28px 28px 5px;padding:52px;color:#fff;background:linear-gradient(145deg,#253039,#3e4a50);border-radius:80px 16px 80px 16px}.main-card span{color:#edb084;font-size:12px;letter-spacing:5px}.main-card strong{display:block;margin-top:110px;font-family:serif;font-size:40px;line-height:1.45}.main-card small{position:absolute;left:52px;bottom:45px;color:#aeb7ba;letter-spacing:4px}.accent-card{right:0;bottom:0;width:150px;height:150px;padding:39px 0;text-align:center;color:#fff;background:var(--orange);border-radius:50%;font-family:serif;font-size:27px;line-height:1.35;transform:rotate(7deg)}.visual-ring{position:absolute;right:22px;top:-24px;width:190px;height:190px;border:35px solid rgba(201,103,63,.13);border-radius:50%}.trust-strip{padding:25px max(24px,calc((100% - var(--max))/2));display:grid;grid-template-columns:repeat(4,1fr);color:#8d8278;background:#e9e0d4;border-block:1px solid var(--line)}.trust-strip span{padding:0 25px;border-right:1px solid #d2c5b5;font-size:11px;letter-spacing:2px}.trust-strip span:first-child{padding-left:0}.trust-strip span:last-child{border:0}.trust-strip b{margin-left:12px;color:var(--ink);font-size:14px;letter-spacing:1px}.section{max-width:var(--max);margin:auto;padding:100px 24px;opacity:0;transform:translateY(20px);transition:.7s}.section.visible,.reveal.visible{opacity:1;transform:none}.reveal{opacity:0;transform:translateY(20px);transition:.7s}.about-grid{margin-top:25px;display:grid;grid-template-columns:.8fr 1.2fr;gap:90px}.section h2{margin:12px 0 18px;font-family:serif;font-size:42px;letter-spacing:3px}.lead{font-family:serif;font-size:26px;line-height:1.65}.about-copy{padding-top:57px;color:var(--muted);font-size:16px;line-height:2}.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:30px}.section-head>p{max-width:430px;color:var(--muted);line-height:1.8}.section-head>a{color:var(--orange);font-size:13px}.business{max-width:none;padding-inline:max(24px,calc((100% - var(--max))/2));background:#fffaf3}.business-grid{margin-top:42px;display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);border:1px solid var(--line)}.business-grid article{min-height:250px;padding:32px;background:#fffaf3;transition:.25s}.business-grid article:hover{color:#fff;background:var(--orange);transform:translateY(-5px)}.business-grid span{font-size:11px;letter-spacing:2px}.business-grid h3{margin-top:65px;font-family:serif;font-size:24px}.business-grid p{color:var(--muted);font-size:13px;line-height:1.8}.business-grid article:hover p{color:#ffeadd}.product-grid{margin-top:45px;display:grid;grid-template-columns:repeat(4,1fr);gap:18px}.product-grid article{overflow:hidden;background:#fffaf3;border:1px solid var(--line);border-radius:22px;transition:.25s}.product-grid article:hover{transform:translateY(-7px);box-shadow:0 20px 40px rgba(82,61,45,.12)}.product-image{height:270px;background:#ebe5dc}.product-grid article>div:last-child{padding:21px}.product-grid small{color:var(--orange);font-size:8px;letter-spacing:2px}.product-grid h3{min-height:48px;margin:9px 0 18px;font-size:16px;line-height:1.5}.product-grid a{font-size:12px;border-bottom:1px solid var(--ink)}.cooperation{max-width:none;padding-inline:max(24px,calc((100% - var(--max))/2));display:grid;grid-template-columns:1fr 1fr;gap:90px;color:#fff;background:var(--ink)}.cooperation h2{font-size:46px}.cooperation p{max-width:500px;color:#bac0c2;line-height:1.9}.button.light{margin-top:20px;color:var(--ink);background:#fff}.steps{margin:0;padding:0;list-style:none}.steps li{padding:20px 0;display:flex;gap:24px;border-bottom:1px solid #48535a}.steps b{color:var(--orange2);font-size:12px}.steps span,.steps strong,.steps small{display:block}.steps strong{font-size:17px}.steps small{margin-top:6px;color:#9fa8ac}.contact{display:grid;grid-template-columns:1fr 1fr;gap:90px;align-items:center}.contact>div:first-child p{color:var(--muted)}.contact-card{padding:15px 34px;background:#fffaf3;border:1px solid var(--line);border-radius:24px}.contact-card p{padding:17px 0;border-bottom:1px solid var(--line)}.contact-card p:last-child{border:0}.contact-card small,.contact-card strong{display:block}.contact-card small{color:var(--orange);font-size:10px;letter-spacing:2px}.contact-card strong{margin-top:7px;font-size:16px}footer{padding:40px max(24px,calc((100% - var(--max))/2));display:flex;align-items:center;justify-content:space-between;color:#9ba4a7;background:#1c252c;font-size:12px}.footer-brand{color:#fff}footer>div:last-child{display:flex;gap:20px}
@media(max-width:900px){.site-header{height:68px;padding:0 18px}.main-nav{position:absolute;left:16px;right:16px;top:73px;padding:12px;display:none;flex-direction:column;gap:0;background:#fffaf3;border:1px solid var(--line);border-radius:15px;box-shadow:0 15px 35px rgba(0,0,0,.12)}.main-nav.open{display:flex}.main-nav a{padding:13px}.header-action{display:none}.menu-button{margin-left:auto;display:block;padding:8px 13px;color:var(--ink);background:transparent;border:1px solid var(--line);border-radius:15px}.hero{min-height:auto;padding-top:55px;grid-template-columns:1fr}.hero h1{font-size:46px}.hero-visual{height:380px}.main-card strong{margin-top:75px;font-size:32px}.trust-strip{grid-template-columns:repeat(2,1fr);gap:18px}.trust-strip span{border:0;padding:0}.about-grid,.cooperation,.contact{grid-template-columns:1fr;gap:35px}.about-copy{padding-top:0}.business-grid,.product-grid{grid-template-columns:repeat(2,1fr)}.section{padding-block:75px}.cooperation{padding-block:75px}.product-image{height:240px}footer{gap:24px;flex-direction:column;text-align:center}}
@media(max-width:560px){.hero{padding-inline:20px}.hero h1{font-size:38px}.hero-intro{font-size:15px}.hero-notes{gap:12px;flex-wrap:wrap}.hero-visual{height:330px}.main-card{padding:34px}.main-card strong{font-size:27px}.main-card small{left:34px}.accent-card{width:112px;height:112px;padding:28px 0;font-size:21px}.section h2{font-size:34px}.section-head{align-items:flex-start;flex-direction:column}.business-grid{grid-template-columns:1fr}.business-grid article{min-height:200px}.business-grid h3{margin-top:35px}.product-grid{grid-template-columns:1fr 1fr;gap:10px}.product-image{height:180px}.product-grid article>div:last-child{padding:14px}.product-grid h3{font-size:14px}.contact-card{padding-inline:22px}}

/* F站企业官网：深靛蓝、鎏金黄、稳重商务式版面 */
:root{--ink:#14213d;--muted:#667085;--paper:#f4f6fa;--cream:#fff;--line:#dfe5ee;--orange:#d99a2b;--orange2:#f4c95d;--white:#fff}
.site-header{background:rgba(255,255,255,.94);border-bottom-color:rgba(20,33,61,.12)}
.brand-seal{background:#14213d;border:2px solid #d99a2b;border-radius:9px;font-family:"Microsoft YaHei",sans-serif}
.main-nav a:after{background:#d99a2b}.header-action{background:#14213d}
.hero{min-height:620px}.hero h1{font-family:"Microsoft YaHei",sans-serif;font-weight:800;letter-spacing:1px}.hero h1 em{color:#c98213}
.eyebrow,.section-label{color:#b9770e}.button.primary{background:#14213d}.button.ghost{border-color:#d99a2b;color:#14213d}
.hero-notes span:before{background:#d99a2b}.hero-visual{height:450px}
.main-card{background:linear-gradient(145deg,#0f1a33,#213866 68%,#304d88);border-radius:8px 64px 8px 64px;box-shadow:0 30px 55px rgba(20,33,61,.24)}
.main-card span{color:#f4c95d}.main-card strong{font-family:"Microsoft YaHei",sans-serif}.main-card small{color:#c8d4ee}
.accent-card{background:#d99a2b;border-radius:12px;transform:rotate(4deg)}
.visual-ring{border-color:rgba(217,154,43,.18);border-radius:50%}
.trust-strip{color:#667085;background:#e9edf5;border-color:#dfe5ee}.trust-strip span{border-color:#ced6e3}
.section h2,.lead,.business-grid h3{font-family:"Microsoft YaHei",sans-serif}
.business{background:#fff}.business-grid{gap:12px;background:transparent;border:0}.business-grid article{background:#f6f8fc;border:1px solid #dfe5ee;border-radius:6px}.business-grid article:hover{background:#213866}
.product-grid article{background:#fff;border-color:#dfe5ee;border-radius:8px}.product-grid small,.section-head>a{color:#b9770e}
.cooperation{background:#14213d}.steps b{color:#f4c95d}.steps li{border-color:#35466a}
footer{background:#0d172b}.footer-legal{margin-left:auto}
@media(max-width:900px){.main-nav{background:#fff}.footer-legal{margin-left:0}}