/* Rajdhani — 老站同款英文字体（自托管，国内可用） */
@font-face{font-family:'Rajdhani';font-style:normal;font-weight:500;font-display:swap;src:url('/assets/fonts/rajdhani-500.ttf') format('truetype')}
@font-face{font-family:'Rajdhani';font-style:normal;font-weight:600;font-display:swap;src:url('/assets/fonts/rajdhani-600.ttf') format('truetype')}
@font-face{font-family:'Rajdhani';font-style:normal;font-weight:700;font-display:swap;src:url('/assets/fonts/rajdhani-700.ttf') format('truetype')}

/* ============================================================
   FOSO POWER — 官网视觉体系 v2
   设计语言：深色沉浸 + 明暗交替节奏 + 大字号排版 + 品牌金点缀
   主色：FOSO 品牌金 #E9C46A（官方 LOGO 取色）
   深色：#231815（LOGO 暖黑）
   ============================================================ */
:root{
  --fos-yellow:#E9C46A;
  --fos-yellow-deep:#D9AE4B;
  --fos-yellow-soft:#FBF5E6;
  --fos-yellow-mist:#F5E8C9;
  --ink:#231815;
  --ink-2:#4A403A;
  --gray:#756F68;
  --gray-light:#A8A29A;
  --bg:#FFFFFF;
  --bg-soft:#F8F6F1;
  --bg-ink:#15100C;
  --bg-ink-2:#1E1712;
  --line:#EAE5DE;
  --line-dark:#332A22;
  --radius-lg:18px;
  --radius-md:12px;
  --radius-sm:8px;
  --shadow-1:0 1px 2px rgba(35,24,21,.05);
  --shadow-2:0 14px 40px -14px rgba(35,24,21,.25);
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI","Helvetica Neue","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Roboto,Arial,sans-serif;
  --container:1200px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:var(--font);color:var(--ink);background:var(--bg);line-height:1.65;font-size:16px;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
ul{list-style:none}
button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit}
.wrap{max-width:var(--container);margin:0 auto;padding:0 24px}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:700;letter-spacing:.16em;text-transform:uppercase;color:var(--fos-yellow-deep)}
.eyebrow::before{content:"";width:26px;height:2px;background:var(--fos-yellow-deep);border-radius:2px}
.sec{padding:104px 0}
.sec-head{max-width:760px;margin-bottom:60px}
.sec-head.center{margin-left:auto;margin-right:auto;text-align:center}
.sec-head.center .eyebrow{justify-content:center}
.sec-title{font-size:clamp(32px,4.2vw,52px);font-weight:800;line-height:1.14;letter-spacing:-.022em;margin:16px 0 18px}
.sec-sub{font-size:17.5px;color:var(--gray);line-height:1.75}
h1,h2,h3{font-weight:700;letter-spacing:-.01em}

/* ---------- 按钮 ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-weight:700;font-size:15.5px;padding:15px 30px;border-radius:999px;transition:all .2s ease;white-space:nowrap;letter-spacing:.01em}
.btn-yellow{background:var(--fos-yellow);color:var(--ink)}
.btn-yellow:hover{background:#F2D07E;transform:translateY(-2px);box-shadow:0 10px 24px -10px rgba(233,196,106,.7)}
.btn-dark{background:var(--ink);color:#fff}
.btn-dark:hover{background:#000;transform:translateY(-2px)}
.btn-ghost{border:1.5px solid var(--line-dark);color:var(--ink)}
.btn-ghost:hover{border-color:var(--ink);background:var(--ink);color:#fff}
.btn-ghost-light{border:1.5px solid rgba(255,255,255,.45);color:#fff}
.btn-ghost-light:hover{border-color:#fff;background:#fff;color:var(--ink)}
.btn svg{width:15px;height:15px}

/* ---------- 顶栏（老站风格：LOGO + 右侧菜单按钮，导航收进滑出面板） ---------- */
.site-header{position:sticky;top:0;z-index:100;background:rgba(26,19,14,.97);backdrop-filter:blur(10px);border-bottom:1px solid rgba(255,255,255,.07)}
.header-in{display:flex;align-items:center;justify-content:space-between;height:78px}
.brand{display:flex;align-items:center;flex-shrink:0}
.brand-logo{height:44px;width:auto;display:block}
.footer-brand .brand-logo{height:36px}
.nav-toggle{display:flex;width:46px;height:46px;border-radius:12px;border:1.5px solid rgba(255,255,255,.3);align-items:center;justify-content:center;color:#fff;transition:all .2s}
.nav-toggle:hover{border-color:var(--fos-yellow);background:rgba(255,255,255,.07)}
.nav-toggle svg{width:22px;height:22px}

/* 右侧滑出菜单（对应老站 cbp-spmenu） */
.nav-overlay{position:fixed;inset:0;background:rgba(21,16,12,.5);opacity:0;pointer-events:none;transition:opacity .28s ease;z-index:110}
.nav-overlay.show{opacity:1;pointer-events:auto}
.side-menu{position:fixed;top:0;right:0;bottom:0;width:min(380px,88vw);background:var(--bg-ink-2);z-index:120;transform:translateX(103%);transition:transform .3s ease;display:flex;flex-direction:column;padding:24px 30px 30px;overflow-y:auto;box-shadow:-24px 0 60px rgba(21,16,12,.35)}
.side-menu.open{transform:translateX(0)}
.sm-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px}
.sm-logo{height:34px;width:auto}
.sm-close{width:40px;height:40px;border-radius:50%;border:1px solid rgba(255,255,255,.22);color:#fff;display:grid;place-items:center;transition:all .15s}
.sm-close svg{width:16px;height:16px}
.sm-close:hover{border-color:var(--fos-yellow);color:var(--fos-yellow)}
.sm-lang{display:flex;gap:8px;border-top:1px solid var(--line-dark);border-bottom:1px solid var(--line-dark);padding:16px 0;margin-bottom:8px}
.sm-lang button{flex:1;padding:9px 0;font-size:13.5px;font-weight:700;letter-spacing:.06em;border:1px solid rgba(255,255,255,.18);border-radius:8px;color:#A39C92;transition:all .15s}
.sm-lang button:hover{color:#fff;border-color:rgba(255,255,255,.4)}
.sm-lang button.on{background:var(--fos-yellow);border-color:var(--fos-yellow);color:var(--ink)}
.sm-nav li{border-bottom:1px solid rgba(255,255,255,.06)}
.sm-nav a{display:block;padding:14px 2px;font-size:16.5px;font-weight:600;letter-spacing:.05em;text-transform:uppercase;color:#D8D2C8;transition:color .15s,padding-left .15s}
.sm-nav a:hover{color:#fff;padding-left:8px}
.sm-nav a.active{color:var(--fos-yellow)}
.sm-bottom{margin-top:auto;padding-top:26px}
.sm-portal{width:100%}
.sm-mail{display:block;text-align:center;margin-top:14px;color:#A39C92;font-size:14px;transition:color .15s}
.sm-mail:hover{color:var(--fos-yellow)}

/* ---------- 首页 Hero：全幅深色摄影 ---------- */
.hero{position:relative;min-height:640px;height:88vh;display:flex;align-items:center;overflow:hidden;background:var(--bg-ink)}
/* 视差媒体层：上下各留 20% 余量供背景位移（老站 stellar 视差的等效实现） */
.hero-media{position:absolute;inset:-20% 0;overflow:hidden;animation:heroZoom 2.8s cubic-bezier(.22,.61,.36,1) both}
.hero-bg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:1;object-position:72% 30%;will-change:transform;backface-visibility:hidden}
@keyframes heroZoom{from{transform:scale(1.07)}to{transform:scale(1)}}
/* 首屏内容依次浮现（老站 wow fadeIn 的层次感） */
.hero-in>*{opacity:0;transform:translateY(24px);transition:opacity 1s cubic-bezier(.22,.61,.36,1),transform 1s cubic-bezier(.22,.61,.36,1)}
.hero.hero-ready .hero-in>*:nth-child(1){opacity:1;transform:none;transition-delay:.12s}
.hero.hero-ready .hero-in>*:nth-child(2){opacity:1;transform:none;transition-delay:.26s}
.hero.hero-ready .hero-in>*:nth-child(3){opacity:1;transform:none;transition-delay:.4s}
.hero.hero-ready .hero-in>*:nth-child(4){opacity:1;transform:none;transition-delay:.54s}
/* 向下滚动提示 */
.hero-down{position:absolute;left:50%;bottom:32px;z-index:3;width:46px;height:46px;margin-left:-23px;border-radius:50%;border:1px solid rgba(255,255,255,.34);color:#fff;display:grid;place-items:center;animation:heroBob 2.4s ease-in-out infinite;transition:border-color .2s,color .2s,background .2s}
.hero-down:hover{border-color:var(--fos-yellow);color:var(--fos-yellow);background:rgba(255,255,255,.06)}
.hero-down svg{width:20px;height:20px}
@keyframes heroBob{0%,100%{transform:translateY(0)}50%{transform:translateY(9px)}}
.hero-veil{position:absolute;inset:0;background:linear-gradient(94deg,rgba(21,16,12,.92) 0%,rgba(21,16,12,.68) 34%,rgba(21,16,12,.24) 62%,rgba(21,16,12,.02) 86%),linear-gradient(rgba(21,16,12,.3),rgba(21,16,12,.04) 45%,rgba(21,16,12,.55))}
.hero-in{position:relative;z-index:2;width:100%;padding:96px 0 120px}
.hero-kicker{display:inline-flex;align-items:center;gap:9px;background:rgba(233,196,106,.14);border:1px solid rgba(233,196,106,.4);color:var(--fos-yellow);font-size:13.5px;font-weight:700;letter-spacing:.1em;text-transform:uppercase;padding:9px 18px;border-radius:999px}
.hero-title{color:#fff;font-size:clamp(40px,5.6vw,74px);font-weight:800;line-height:1.08;letter-spacing:-.025em;margin:28px 0 22px;max-width:820px;text-wrap:balance}
.hero-title em{font-style:normal;color:var(--fos-yellow)}
.hero-sub{font-size:clamp(17px,1.6vw,20px);color:#D8D2C8;line-height:1.8;max-width:600px}
.hero-cta{display:flex;gap:14px;margin-top:42px;flex-wrap:wrap}
.hero-strip{position:absolute;left:0;right:0;bottom:0;z-index:2;border-top:1px solid rgba(255,255,255,.14);background:rgba(21,16,12,.55);backdrop-filter:blur(6px)}
.hero-strip .wrap{display:flex;align-items:center;gap:12px;padding-top:16px;padding-bottom:16px;color:#B8B1A5;font-size:13.5px}
.hero-strip svg{width:16px;height:16px;stroke:var(--fos-yellow);flex-shrink:0}

/* ---------- 金色口号条 ---------- */
.strap{background:var(--fos-yellow);color:var(--ink)}
.strap-in{display:flex;align-items:center;justify-content:space-between;gap:28px;padding:30px 0;flex-wrap:wrap}
.strap-quote{font-size:clamp(19px,2.5vw,27px);font-weight:800;letter-spacing:-.01em}
.strap-quote i{font-style:normal}
.strap-quote span{opacity:.85}
.strap-tags{display:flex;gap:12px;flex-wrap:wrap}
.strap-tags span{font-size:13px;font-weight:700;color:var(--ink);border:1.5px solid rgba(35,24,21,.35);padding:8px 15px;border-radius:999px;letter-spacing:.02em}

/* ---------- 全幅标语横幅 ---------- */
.band{position:relative;overflow:hidden;background:var(--bg-ink)}
.band-bg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:.5}
.band-veil{position:absolute;inset:0;background:linear-gradient(rgba(21,16,12,.72),rgba(21,16,12,.82))}
.band-in{position:relative;z-index:2;text-align:center;padding:130px 24px;max-width:880px;margin:0 auto}
.band-in h2{color:#fff;font-size:clamp(30px,4.4vw,54px);font-weight:800;line-height:1.16;letter-spacing:-.02em;text-wrap:balance}
.band-in h2 em{font-style:normal;color:var(--fos-yellow)}
.band-in p{color:#C9C2B6;font-size:17.5px;line-height:1.8;margin-top:20px}

.nw{white-space:nowrap}
/* 成立计时条（沿用老站 about：2009-07-11 起 days/hours/min/sec） */
.since-band{position:relative;background:#291D00;text-align:center;padding:110px 24px 96px;border-bottom:1px solid var(--line-dark);overflow:hidden}
.since-bg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;object-position:72% 100%}
.since-veil{position:absolute;inset:0;background:linear-gradient(rgba(21,16,12,.86),rgba(21,16,12,.76))}
.since-head{position:relative;z-index:1;font-family:'Rajdhani',sans-serif;color:#fff;font-size:32px;font-weight:600;line-height:40px;text-transform:uppercase;letter-spacing:normal;margin:0;padding-top:10px}
.since-sub{position:relative;z-index:1;font-family:'Rajdhani',sans-serif;color:#fff;opacity:.5;margin-top:6px;font-size:14px;font-weight:400;line-height:24px;letter-spacing:normal;text-transform:uppercase}
.since-grid{position:relative;z-index:1;display:grid;grid-template-columns:repeat(4,1fr);gap:12px;max-width:1140px;margin:25px auto 0}
.since-grid b{display:block;font-family:'Rajdhani',sans-serif;font-size:60px;font-weight:500;color:#F2CA6B;font-variant-numeric:tabular-nums;line-height:1.2;letter-spacing:normal;overflow:hidden}
.since-grid b .nv{display:inline-block}
.since-grid b.roll .nv{animation:sinceRoll .5s cubic-bezier(.25,.8,.3,1)}
@keyframes sinceRoll{0%{transform:translateY(78%);opacity:0}100%{transform:translateY(0);opacity:1}}
.since-grid b + span{display:block;font-family:'Rajdhani',sans-serif;font-size:25px;line-height:30px;font-weight:400;letter-spacing:normal;color:#fff}
@media (max-width:620px){.since-grid{grid-template-columns:repeat(2,1fr);gap:30px 18px}.since-head{font-size:26px;line-height:34px}.since-grid b{font-size:48px}}

/* 品类能力卡片 */
.cap-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.cap-card{background:var(--bg);border:1px solid var(--line);border-radius:var(--radius-lg);padding:0 30px 30px;transition:all .25s ease;display:flex;flex-direction:column;position:relative;overflow:hidden}
.cap-media{margin:0 -30px 24px;aspect-ratio:16/8.5;overflow:hidden;background:var(--bg-soft)}
.cap-media img{width:100%;height:100%;object-fit:cover;transition:transform .6s ease}
.cap-card:hover .cap-media img{transform:scale(1.05)}
.cap-media-soon{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;background:linear-gradient(135deg,var(--bg-ink-2),#3A2E1C);color:var(--fos-yellow)}
.cap-media-soon svg{width:44px;height:44px;opacity:.9}
.cap-media-soon span{font-size:12.5px;font-weight:600;letter-spacing:.08em;text-transform:uppercase;color:#C9C2B6}
.cap-card::before{content:"";position:absolute;left:0;top:0;width:100%;height:4px;background:linear-gradient(90deg,var(--fos-yellow),var(--fos-yellow-deep));opacity:0;transition:opacity .25s;z-index:1}
.cap-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-2);border-color:#E2DcD2}
.cap-card:hover::before{opacity:1}
.cap-ico{width:56px;height:56px;border-radius:16px;background:var(--fos-yellow-soft);border:1px solid var(--fos-yellow-mist);display:grid;place-items:center;margin-bottom:22px}
.cap-ico svg{width:27px;height:27px;stroke:var(--fos-yellow-deep)}
.cap-card h3{font-size:21px;margin-bottom:10px}
.cap-card>p{color:var(--gray);font-size:15px;line-height:1.75;flex:1}
.cap-chips{display:flex;flex-wrap:wrap;gap:8px;margin-top:20px}
.cap-chips span{font-size:12.5px;color:var(--ink-2);background:var(--bg-soft);border:1px solid var(--line);padding:5px 12px;border-radius:999px}

/* 我们能做什么 — 老站 feature-box 形状：竖版白卡居中、顶部金圆图标、hover 金色自底部涨满并反色 */
.do-sec{background:var(--bg-soft)}
.do-title{text-align:right;margin-bottom:56px}
.do-title .sec-title{margin:14px 0 0}
.do-line{width:64px;height:3px;background:var(--fos-yellow);border-radius:2px;margin:20px 0 0 auto}
.do-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.do-tile{position:relative;display:flex;flex-direction:column;align-items:center;justify-content:flex-start;text-align:center;background:#fff;box-shadow:0 0 3px rgba(0,0,0,.1);padding:56px 34px 48px;overflow:hidden}
.do-overlay{position:absolute;left:0;right:0;bottom:0;height:2px;background:var(--fos-yellow);transition:height .2s ease-in-out;z-index:0}
.do-tile:hover .do-overlay{height:100%}
.do-ico{position:relative;z-index:1;width:80px;height:80px;border-radius:50%;background:var(--fos-yellow);display:grid;place-items:center;margin-bottom:26px;flex-shrink:0;transition:background .2s ease-in-out}
.do-ico svg{width:40px;height:40px;stroke:var(--ink);transition:stroke .2s ease-in-out}
.do-tile:hover .do-ico{background:#333}
.do-tile:hover .do-ico svg{stroke:var(--fos-yellow)}
.do-name{text-wrap:balance;position:relative;z-index:1;display:block;font-family:'Rajdhani',sans-serif;font-weight:700;font-size:20px;letter-spacing:.1em;text-transform:uppercase;color:var(--ink);line-height:1.35;margin-bottom:12px}
.do-desc{position:relative;z-index:1;color:var(--gray);font-size:14.5px;line-height:1.75;max-width:330px;transition:color .2s ease-in-out}
.do-tile:hover .do-desc{color:#231815}
@media (max-width:900px){.do-grid{grid-template-columns:1fr;gap:16px}.do-tile{padding:46px 26px 42px}}
@media (max-width:1080px) and (min-width:901px){.do-tile{padding:44px 24px 40px}.do-name{font-size:16px}.do-desc{font-size:13.5px}}

/* 流程步骤 — 与"能做什么"统一为竖版白卡（老站 feature-box 样式：金色圆标置顶 + hover 金底涨满） */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:26px}
.step{position:relative;display:flex;flex-direction:column;align-items:center;justify-content:flex-start;text-align:center;background:#fff;box-shadow:0 0 3px rgba(0,0,0,.1);padding:56px 30px 48px;overflow:hidden}
.step::before{content:"";position:absolute;left:0;right:0;bottom:0;height:2px;background:var(--fos-yellow);transition:height .2s ease-in-out;z-index:0}
.step:hover::before{height:100%}
.step-num{position:relative;z-index:1;width:80px;height:80px;border-radius:50%;background:var(--fos-yellow);display:grid;place-items:center;font-family:'Rajdhani',sans-serif;font-size:26px;font-weight:700;color:var(--ink);letter-spacing:.02em;margin-bottom:26px;transition:background .2s ease-in-out,color .2s ease-in-out}
.step:hover .step-num{background:#333;color:var(--fos-yellow)}
.step h3{text-wrap:balance;position:relative;z-index:1;font-family:'Rajdhani',sans-serif;font-weight:700;font-size:20px;letter-spacing:.1em;text-transform:uppercase;color:var(--ink);line-height:1.35;margin-bottom:12px}
.step p{position:relative;z-index:1;color:var(--gray);font-size:14.5px;line-height:1.75;max-width:330px;transition:color .2s ease-in-out}
.step:hover p{color:#231815}
@media (max-width:1080px){.steps{grid-template-columns:repeat(2,1fr)}.step{padding:44px 26px 40px}.step h3{font-size:17px}}
@media (max-width:900px){.steps{grid-template-columns:1fr}.step{padding:46px 26px 42px}.step h3{font-size:18px}}

/* 图文分栏 */
.split{display:grid;grid-template-columns:1fr 1fr;gap:80px;align-items:center}
.split.flip .split-media{order:2}
.split-media .img-frame{border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-2)}
.split-media .img-frame img{width:100%;height:100%;object-fit:cover}
.split-media .img-frame{aspect-ratio:4/3.1;background:var(--bg-soft)}
.split-body h2{font-size:clamp(28px,3.2vw,42px);margin:14px 0 18px;line-height:1.18;letter-spacing:-.02em}
.split-body>p{color:var(--gray);font-size:16.5px;line-height:1.8}

/* 图组（实验室） */
.gallery3{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.g-item{border-radius:var(--radius-lg);overflow:hidden;position:relative;aspect-ratio:4/3;box-shadow:var(--shadow-1)}
.g-item img{width:100%;height:100%;object-fit:cover;transition:transform .6s ease}
.g-item:hover img{transform:scale(1.05)}
.g-cap{position:absolute;inset:auto 0 0 0;background:linear-gradient(transparent,rgba(21,16,12,.85));color:#fff;padding:44px 18px 15px;font-size:14px;font-weight:600}

/* 应用标签行 */
.app-row{display:grid;grid-template-columns:repeat(6,1fr);gap:14px;text-align:center}
.app-tag{background:var(--bg-soft);border:1px solid var(--line);border-radius:var(--radius-md);padding:20px 10px;font-weight:600;font-size:14.5px;transition:all .2s}
.app-tag:hover{background:var(--fos-yellow);border-color:var(--fos-yellow);transform:translateY(-3px)}

/* CTA 横幅 */
/* 全幅视差区块（老站首页灯丝灯 parallax 同款机制） */
.parallax-band{position:relative;overflow:hidden;min-height:460px;display:flex;align-items:center;background:var(--bg-ink)}
.pb-media{position:absolute;inset:-20% 0;overflow:hidden}
.pb-bg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;object-position:50% 46%;will-change:transform;backface-visibility:hidden}
.pb-veil{position:absolute;inset:0;background:radial-gradient(ellipse at 50% 45%,rgba(21,16,12,.48),rgba(21,16,12,.8))}
.pb-in{position:relative;z-index:2;width:100%;text-align:center;padding:104px 0}
.pb-in h2{color:#fff;font-size:clamp(28px,3.4vw,44px);font-weight:800;letter-spacing:-.02em;margin:0 0 16px;text-wrap:balance}
.pb-in p{color:#D8D2C8;font-size:clamp(16px,1.5vw,19px);line-height:1.8;max-width:680px;margin:0 auto 34px}
/* 视差降级：窄屏与减少动效时回到静态背景 */
@media (max-width:1024px){.hero-media,.pb-media{inset:0}}
@media (prefers-reduced-motion:reduce){
.hero-media{animation:none}
.hero-down{animation:none}
.hero-in>*{opacity:1 !important;transform:none !important;transition:none !important}
}
.cta-band{background:var(--fos-yellow);border-radius:28px;padding:68px;display:flex;align-items:center;justify-content:space-between;gap:40px;flex-wrap:wrap;position:relative;overflow:hidden}
.cta-band::after{content:"";position:absolute;right:-120px;top:-120px;width:340px;height:340px;border-radius:50%;background:rgba(255,255,255,.18)}
.cta-band h2{font-size:clamp(28px,3.4vw,42px);max-width:600px;line-height:1.18;letter-spacing:-.02em;position:relative;z-index:1}
.cta-band p{color:#4A3A08;margin-top:12px;max-width:560px;font-size:16.5px;position:relative;z-index:1}
.cta-band .btn-dark{background:var(--ink);position:relative;z-index:1}

/* ---------- 通用页面 hero（子页）：深色 ---------- */
.page-hero{background:var(--bg-ink);color:#fff;position:relative;overflow:hidden}
.page-hero::after{content:"";position:absolute;right:-160px;top:-160px;width:480px;height:480px;border-radius:50%;background:radial-gradient(circle,rgba(233,196,106,.14),transparent 65%)}
.page-hero-in{padding:96px 0 84px;position:relative;z-index:1}
.page-hero .eyebrow{color:var(--fos-yellow)}
.page-hero .eyebrow::before{background:var(--fos-yellow)}
.page-hero h1{font-size:clamp(34px,4.6vw,56px);letter-spacing:-.025em;line-height:1.12;margin:18px 0 16px;max-width:820px;text-wrap:balance}
.page-hero p{color:#BDB6AA;font-size:17.5px;max-width:680px;line-height:1.8}

/* ---------- 联系页 ---------- */
.contact-grid{display:grid;grid-template-columns:1fr 1.1fr;gap:64px;align-items:start}
.contact-card{background:var(--bg-soft);border-radius:var(--radius-lg);padding:26px;margin-bottom:18px}
.contact-card h3{font-size:17px;margin-bottom:14px;display:flex;align-items:center;gap:10px}
.contact-card h3 .cico{width:30px;height:30px;border-radius:9px;background:var(--fos-yellow);display:grid;place-items:center;flex-shrink:0}
.contact-card h3 .cico svg{width:15px;height:15px;stroke:var(--ink)}
.contact-card p,.contact-card li{color:var(--ink-2);line-height:1.9;font-size:15px}
.form-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:38px;box-shadow:var(--shadow-2)}
.form-card h2{font-size:25px;margin-bottom:6px}
.form-card .form-sub{color:var(--gray);font-size:14.5px;margin-bottom:26px}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.field{margin-bottom:16px}
.field label{display:block;font-size:13.5px;font-weight:600;margin-bottom:7px;color:var(--ink-2)}
.field input,.field select,.field textarea{width:100%;border:1.5px solid var(--line);border-radius:10px;padding:12px 14px;font-size:15px;font-family:inherit;background:var(--bg);transition:border .2s;color:var(--ink)}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--fos-yellow-deep);box-shadow:0 0 0 3px var(--fos-yellow-mist)}
.field textarea{min-height:120px;resize:vertical}
.field-hint{font-size:12.5px;color:var(--gray-light);margin-top:6px}
.form-ok{display:none;background:#EDF7EC;border:1px solid #BFE3BB;color:#256A1E;padding:14px 16px;border-radius:10px;font-size:14.5px;margin-bottom:18px}

/* ---------- 客户门户 ---------- */
.portal-hero{background:var(--bg-ink);color:#fff;position:relative;overflow:hidden}
.portal-hero::after{content:"";position:absolute;right:-140px;bottom:-140px;width:440px;height:440px;border-radius:50%;background:radial-gradient(circle,rgba(233,196,106,.16),transparent 65%)}
.portal-hero-in{padding:80px 0;display:flex;justify-content:space-between;align-items:center;gap:30px;flex-wrap:wrap;position:relative;z-index:1}
.portal-hero h1{font-size:clamp(28px,3.2vw,42px);letter-spacing:-.02em}
.portal-hero p{color:#9B9488;margin-top:10px;max-width:560px}
.login-card{max-width:420px;margin:0 auto;background:#fff;border:1px solid var(--line);border-radius:20px;padding:38px;box-shadow:var(--shadow-2)}

/* 小屏适配 */
@media (max-width:1080px){
  .cap-grid{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:1fr}
  .footer-top{grid-template-columns:1fr 1fr;gap:40px}
  .app-row{grid-template-columns:repeat(3,1fr)}
  .gallery3{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:900px){
  .hero{min-height:560px;height:auto}
  .hero-in{padding:80px 0 110px}
  .split{grid-template-columns:1fr;gap:40px}
  .split.flip .split-media{order:0}
  .contact-grid{grid-template-columns:1fr;gap:36px}
  .brand-logo{height:38px}
  .band-in{padding:90px 24px}
}
@media (max-width:620px){
  .sec{padding:72px 0}
  .cap-grid,.steps,.gallery3,.why-grid{grid-template-columns:1fr}
  .form-row{grid-template-columns:1fr}
  .app-row{grid-template-columns:repeat(2,1fr)}
  .cta-band{padding:44px 28px}
  .footer-top{grid-template-columns:1fr}
  .hero-title{font-size:clamp(34px,9vw,44px)}
  .strap-in{padding:24px 0}
}
.sec.alt{background:var(--bg-soft)}
/* 为什么 FOSO — 与"能做什么"统一为竖版白卡（老站 feature-box 样式） */
.why-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:26px}
.why-card{position:relative;display:flex;flex-direction:column;align-items:center;justify-content:flex-start;text-align:center;background:#fff;box-shadow:0 0 3px rgba(0,0,0,.1);padding:56px 30px 48px;overflow:hidden}
.why-card::before{content:"";position:absolute;left:0;right:0;bottom:0;height:2px;background:var(--fos-yellow);transition:height .2s ease-in-out;z-index:0}
.why-card:hover::before{height:100%}
.why-card .cap-ico{width:80px;height:80px;border-radius:50%;background:var(--fos-yellow);border:0;margin:0 0 26px;position:relative;z-index:1;transition:background .2s ease-in-out}
.why-card .cap-ico svg{width:34px;height:34px;stroke:var(--ink);transition:stroke .2s ease-in-out}
.why-card:hover .cap-ico{background:#333}
.why-card:hover .cap-ico svg{stroke:var(--fos-yellow)}
.why-card h3{text-wrap:balance;position:relative;z-index:1;font-family:'Rajdhani',sans-serif;font-weight:700;font-size:20px;letter-spacing:.1em;text-transform:uppercase;color:var(--ink);line-height:1.35;margin-bottom:12px}
.why-card p{position:relative;z-index:1;color:var(--gray);font-size:14.5px;line-height:1.75;max-width:330px;transition:color .2s ease-in-out}
.why-card:hover p{color:#231815}
@media (max-width:1080px){.why-grid{grid-template-columns:repeat(2,1fr)}.why-card{padding:44px 26px 40px}.why-card h3{font-size:17px}}
@media (max-width:900px){.why-grid{grid-template-columns:1fr}.why-card{padding:46px 26px 42px}.why-card h3{font-size:18px}}

/* 双基地展示 */
.base-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px}
.base-card{border-radius:var(--radius-lg);overflow:hidden;border:1px solid var(--line);background:var(--bg);transition:all .25s}
.base-card:hover{box-shadow:var(--shadow-2);transform:translateY(-3px)}
.base-img{aspect-ratio:16/7.5;overflow:hidden}
.base-img img{width:100%;height:100%;object-fit:cover}
.base-body{padding:26px 28px 30px}
.base-body .base-tag{display:inline-block;font-size:12px;font-weight:700;letter-spacing:.08em;background:var(--fos-yellow-soft);color:#7A5E14;border-radius:999px;padding:5px 12px;margin-bottom:12px}
.base-body h3{font-size:20px;margin-bottom:8px}
.base-body p{color:var(--gray);font-size:14.5px;line-height:1.75}
.base-empty{background:var(--bg-soft);border:1.5px dashed var(--gray-light);border-radius:var(--radius-lg);padding:34px;color:var(--gray);font-size:14.5px;line-height:1.8}
@media (max-width:900px){.base-grid{grid-template-columns:1fr}}

/* 新闻列表 */
.news-list{display:grid;gap:16px}
.news-item{display:flex;gap:22px;background:var(--bg);border:1px solid var(--line);border-radius:var(--radius-md);padding:22px 24px;align-items:flex-start;transition:all .2s}
.news-item:hover{border-color:var(--fos-yellow-deep);box-shadow:var(--shadow-1)}
.news-date{flex-shrink:0;text-align:center;border-right:1px solid var(--line);padding-right:22px;min-width:86px}
.news-date b{display:block;font-size:24px;font-weight:800;line-height:1.1}
.news-date span{font-size:12.5px;color:var(--gray)}
.news-body h3{font-size:17.5px;line-height:1.4;margin-bottom:6px}
.news-body h3 a:hover{color:var(--fos-yellow-deep)}
.news-body p{color:var(--gray);font-size:14px;line-height:1.7}

/* 通用工具 */
.list-check li{display:flex;gap:12px;align-items:flex-start;margin-bottom:13px;color:var(--ink-2);font-size:15.5px}
.list-check .dot{flex-shrink:0;width:20px;height:20px;border-radius:50%;background:var(--fos-yellow);display:grid;place-items:center;margin-top:3px}
.list-check .dot svg{width:11px;height:11px;stroke:var(--ink);stroke-width:3}
.two-col{columns:2;column-gap:34px}
@media (max-width:620px){.two-col{columns:1}}
.page-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
.page-tags span{font-size:13.5px;font-weight:600;background:rgba(255,255,255,.06);border:1px solid rgba(233,196,106,.35);padding:8px 16px;border-radius:999px;color:var(--fos-yellow)}

/* 编号流程列表 */
.flow-list{display:grid;grid-template-columns:1fr 1fr;gap:14px 40px}
.flow-item{display:flex;gap:14px;background:var(--bg);border:1px solid var(--line);border-radius:var(--radius-md);padding:16px 18px;align-items:flex-start;transition:all .2s}
.flow-item:hover{border-color:var(--fos-yellow-deep);box-shadow:var(--shadow-1)}
.flow-n{flex-shrink:0;width:36px;height:36px;border-radius:10px;background:var(--fos-yellow);display:grid;place-items:center;font-weight:800;font-size:14px;color:var(--ink)}
.flow-item h4{font-size:15.5px;margin-bottom:4px}
.flow-item p{color:var(--gray);font-size:13.5px;line-height:1.6}
.quote-note{border-left:4px solid var(--fos-yellow);background:var(--bg-soft);border-radius:0 var(--radius-md) var(--radius-md) 0;padding:22px 26px}
.quote-note b{display:block;font-size:17px;margin-bottom:6px}
.quote-note p{color:var(--gray);font-size:15px;line-height:1.75}
@media (max-width:620px){.flow-list{grid-template-columns:1fr}}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--bg-ink);color:#C9C9BD;font-size:14.5px;border-top:3px solid var(--fos-yellow)}
.footer-top{padding:76px 0 48px;display:grid;grid-template-columns:1.5fr .9fr 1.3fr;gap:48px}
.footer-cities{margin:2px 0 16px}
.footer-cities li{font-size:15px;color:#9B9488;margin-bottom:8px;padding-left:15px;position:relative}
.footer-cities li::before{content:"";position:absolute;left:0;top:8px;width:5px;height:5px;border-radius:50%;background:var(--fos-yellow)}
.site-header .brand-logo{height:46px}
.footer-brand .brand-logo{height:44px}
.footer-brand .brand-logo{height:36px}
.footer-about{margin-top:20px;font-size:15px;color:#9B9488;line-height:1.8;max-width:340px}
.footer-h{font-size:16px;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:#fff;margin-bottom:18px}
.footer-col li{margin-bottom:10px}
.footer-col a{color:#9B9488;font-size:15px;transition:color .15s}
.footer-col a:hover{color:var(--fos-yellow)}
.footer-base-name{font-size:15px;font-weight:600;color:#E4E0D8;margin-bottom:2px}
.footer-addr{font-size:15px;color:#9B9488;line-height:1.75;margin-bottom:10px}
.footer-meta li{display:flex;gap:10px;font-size:15px;color:#9B9488;margin-bottom:9px}
.footer-meta b{color:#D8D3CA;font-weight:600}
.footer-bottom{border-top:1px solid var(--line-dark);padding:22px 0;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;color:#77716A;font-size:13px}

/* ---------- 侧边菜单：产品二级菜单（含号点与展开动画） ---------- */
.sm-has-sub > .sm-sub-toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 14px 2px;
  font-family: inherit;
  font-size: 16.5px;
  font-weight: 600;
  letter-spacing: .05em;
  text-transform: uppercase;
  text-align: left;
  color: #D8D2C8;
  background: none;
  border: 0;
  cursor: pointer;
  transition: color .15s, padding-left .15s;
}

.sm-has-sub > .sm-sub-toggle:hover {
  color: #fff;
  padding-left: 8px;
}

.sm-has-sub > .sm-sub-toggle.active {
  color: var(--fos-yellow);
}

/* 加号 → 减号 */
.sm-plus {
  position: relative;
  flex: 0 0 14px;
  width: 14px;
  height: 14px;
  margin-left: 12px;
}

.sm-plus::before,
.sm-plus::after {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  width: 14px;
  height: 2px;
  margin-top: -1px;
  border-radius: 2px;
  background: currentColor;
  transition: transform .25s ease;
}

.sm-plus::after {
  transform: rotate(90deg);
}

.sm-has-sub.open .sm-plus::after {
  transform: rotate(90deg) scaleX(0);
}

/* 子菜单：默认收起，点开才展开 */
.sm-sub {
  max-height: 0;
  overflow: hidden;
  list-style: none;
  margin: 0;
  padding: 0;
  transition: max-height .3s ease;
}

.sm-has-sub.open .sm-sub {
  max-height: 460px;
}

.sm-nav .sm-sub li {
  border-bottom: 0;
}

.sm-nav .sm-sub a {
  display: flex;
  align-items: center;
  padding: 10px 2px 10px 14px;
  font-size: 14.5px;
  font-weight: 500;
  letter-spacing: .03em;
  text-transform: none;
  color: #B9B2A8;
}

.sm-nav .sm-sub a:hover {
  color: #fff;
  padding-left: 20px;
}

.sm-nav .sm-sub a.active {
  color: var(--fos-yellow);
}

.sm-dot {
  flex: 0 0 6px;
  width: 6px;
  height: 6px;
  margin-right: 10px;
  border-radius: 50%;
  background: var(--fos-yellow);
}