/* ============================================================
   广东见川信息技术有限公司 — orin.ink
   设计系统：深海蓝 × 科技蓝 × 青
   ============================================================ */

:root{
  --primary:#0a3d62;
  --primary-2:#0e527f;
  --accent:#1e90ff;
  --accent-2:#00d2d3;
  --ink:#22354a;
  --dark:#0d1b29;
  --muted:#64748b;
  --bg:#f7fafc;
  --card:#ffffff;
  --line:#e4edf5;
  --grad:linear-gradient(135deg,#0a3d62 0%,#1e90ff 55%,#00d2d3 100%);
  --grad-soft:linear-gradient(135deg,rgba(30,144,255,.10),rgba(0,210,211,.10));
  --shadow-sm:0 2px 10px rgba(10,61,98,.06);
  --shadow-md:0 12px 32px rgba(10,61,98,.10);
  --shadow-lg:0 24px 60px rgba(10,61,98,.16);
  --radius:20px;
  --radius-sm:14px;
  --container:1200px;
  --nav-h:76px;
  --ease:cubic-bezier(.22,.61,.36,1);
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --font-mono:"SF Mono",ui-monospace,Menlo,Consolas,"Liberation Mono",monospace;
}

*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}
}
body{
  font-family:var(--font);color:var(--ink);line-height:1.75;background:var(--bg);
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
a{color:inherit;text-decoration:none}
img,svg{display:block;max-width:100%}
button{font-family:inherit;cursor:pointer}
:focus-visible{outline:3px solid rgba(30,144,255,.55);outline-offset:3px;border-radius:4px}
::selection{background:rgba(30,144,255,.25)}

.container{max-width:var(--container);margin:0 auto;padding:0 24px}

.skip-link{
  position:absolute;left:16px;top:-60px;z-index:200;background:var(--primary);color:#fff;
  padding:10px 18px;border-radius:10px;font-size:14px;transition:top .2s;
}
.skip-link:focus{top:12px}

/* ============ 顶部滚动进度条 ============ */
.progress{
  position:fixed;top:0;left:0;right:0;height:3px;z-index:300;
  background:transparent;pointer-events:none;
}
.progress .bar{
  height:100%;width:0;background:linear-gradient(90deg,var(--accent),var(--accent-2));
  box-shadow:0 0 12px rgba(30,144,255,.6);
}

/* ============ 导航 ============ */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:200;
  transition:background .3s,box-shadow .3s,border-color .3s;
  border-bottom:1px solid transparent;
}
.nav-inner{
  max-width:var(--container);margin:0 auto;padding:0 24px;height:var(--nav-h);
  display:flex;align-items:center;justify-content:space-between;gap:24px;
}
.nav.scrolled{
  background:rgba(255,255,255,.86);
  -webkit-backdrop-filter:saturate(180%) blur(18px);backdrop-filter:saturate(180%) blur(18px);
  border-bottom-color:rgba(10,61,98,.08);
  box-shadow:0 6px 30px rgba(10,61,98,.07);
}
.logo{display:flex;align-items:baseline;gap:10px;flex-shrink:0}
.logo-en{
  font-size:26px;font-weight:900;letter-spacing:-1px;line-height:1;
  background:linear-gradient(135deg,#0a3d62,#1e90ff 60%,#00d2d3);
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;
}
.logo-cn{font-size:18px;font-weight:800;color:var(--primary);letter-spacing:3px;line-height:1}
.nav-links{display:flex;gap:30px;list-style:none;align-items:center}
.nav-links a{
  font-size:14.5px;color:var(--muted);font-weight:500;position:relative;
  padding:6px 2px;transition:color .2s;
}
.nav-links a::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;border-radius:2px;
  background:linear-gradient(90deg,var(--accent),var(--accent-2));
  transform:scaleX(0);transform-origin:left;transition:transform .3s var(--ease);
}
.nav-links a:hover{color:var(--primary)}
.nav-links a:hover::after,.nav-links a.active::after{transform:scaleX(1)}
.nav-links a.active{color:var(--primary);font-weight:600}
.nav-cta{
  padding:10px 22px;border-radius:100px;color:#fff!important;font-weight:600!important;
  background:linear-gradient(135deg,var(--accent),var(--accent-2));
  box-shadow:0 6px 18px rgba(30,144,255,.35);transition:transform .2s,box-shadow .2s!important;
}
.nav-cta::after{display:none}
.nav-cta:hover{transform:translateY(-2px);box-shadow:0 10px 26px rgba(30,144,255,.45)}
.nav-cta.active{box-shadow:0 0 0 3px rgba(30,144,255,.35),0 6px 18px rgba(30,144,255,.35)}
.menu-btn{
  display:none;background:none;border:0;width:44px;height:44px;padding:10px;
  flex-direction:column;justify-content:center;align-items:center;gap:5px;border-radius:10px;
}
.menu-btn span{display:block;width:22px;height:2px;background:var(--ink);border-radius:2px;transition:transform .3s var(--ease),opacity .2s}
.menu-btn[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.menu-btn[aria-expanded="true"] span:nth-child(2){opacity:0}
.menu-btn[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ============ HERO ============ */
.hero{
  position:relative;overflow:hidden;
  padding:calc(var(--nav-h) + 90px) 0 0;
  background:
    radial-gradient(ellipse 60% 50% at 82% 12%,rgba(30,144,255,.16),transparent 60%),
    radial-gradient(ellipse 50% 45% at 8% 88%,rgba(0,210,211,.14),transparent 60%),
    linear-gradient(180deg,#eef6ff 0%,#ffffff 78%);
}
.hero-grid{
  max-width:var(--container);margin:0 auto;padding:0 24px;
  display:grid;grid-template-columns:1.08fr .92fr;gap:64px;align-items:center;
}
.hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:
    linear-gradient(rgba(30,144,255,.05) 1px,transparent 1px),
    linear-gradient(90deg,rgba(30,144,255,.05) 1px,transparent 1px);
  background-size:44px 44px;
  -webkit-mask-image:radial-gradient(ellipse 70% 60% at 50% 20%,#000 20%,transparent 75%);
  mask-image:radial-gradient(ellipse 70% 60% at 50% 20%,#000 20%,transparent 75%);
}
.hero-txt{position:relative;padding-bottom:56px}
.tag{
  display:inline-flex;align-items:center;gap:9px;
  background:rgba(30,144,255,.09);color:var(--primary-2);
  border:1px solid rgba(30,144,255,.22);
  padding:8px 18px;border-radius:100px;font-size:13.5px;font-weight:600;margin-bottom:26px;
}
.tag .dot{
  width:7px;height:7px;border-radius:50%;background:var(--accent-2);
  box-shadow:0 0 0 0 rgba(0,210,211,.5);animation:pulse 2.2s infinite;
}
@keyframes pulse{
  0%{box-shadow:0 0 0 0 rgba(0,210,211,.45)}
  70%{box-shadow:0 0 0 9px rgba(0,210,211,0)}
  100%{box-shadow:0 0 0 0 rgba(0,210,211,0)}
}
.hero h1{
  font-size:clamp(38px,5.2vw,62px);font-weight:800;line-height:1.14;letter-spacing:-1.5px;
  color:var(--dark);margin-bottom:22px;
}
.hero h1 .grad{
  background:linear-gradient(135deg,#0a3d62 0%,#1e90ff 60%,#00a8b8 100%);
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;
}
.hero .lead{
  font-size:clamp(16px,1.6vw,19px);color:var(--muted);max-width:560px;margin-bottom:36px;
}
.hero-actions{display:flex;gap:16px;flex-wrap:wrap;align-items:center}
.btn{
  display:inline-flex;align-items:center;gap:9px;padding:15px 34px;border-radius:100px;
  font-size:16px;font-weight:600;transition:transform .2s var(--ease),box-shadow .2s,background .2s;
  will-change:transform;
}
.btn-primary{
  background:linear-gradient(135deg,var(--accent),var(--accent-2));color:#fff;
  box-shadow:0 12px 30px rgba(30,144,255,.35);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 16px 40px rgba(30,144,255,.45)}
.btn-ghost{
  background:#fff;color:var(--primary);border:1.5px solid var(--line);
}
.btn-ghost:hover{transform:translateY(-2px);border-color:var(--accent);color:var(--accent)}
.btn .arr{transition:transform .25s var(--ease)}
.btn:hover .arr{transform:translateX(4px)}

/* 终端装饰卡片 */
.terminal-wrap{position:relative;padding-bottom:40px}
.terminal{
  position:relative;border-radius:18px;overflow:hidden;
  background:rgba(13,27,41,.94);box-shadow:0 30px 70px rgba(10,61,98,.28);
  border:1px solid rgba(255,255,255,.08);
  -webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);
  animation:floaty 7s ease-in-out infinite;
}
@media (prefers-reduced-motion:reduce){.terminal{animation:none}}
@keyframes floaty{0%,100%{transform:translateY(0)}50%{transform:translateY(-10px)}}
.terminal-bar{
  display:flex;align-items:center;gap:7px;padding:13px 16px;
  background:rgba(255,255,255,.05);border-bottom:1px solid rgba(255,255,255,.07);
}
.terminal-bar i{width:11px;height:11px;border-radius:50%;display:block}
.terminal-bar i:nth-child(1){background:#ff5f57}
.terminal-bar i:nth-child(2){background:#febc2e}
.terminal-bar i:nth-child(3){background:#28c840}
.terminal-bar .t-title{margin-left:8px;font-family:var(--font-mono);font-size:12px;color:rgba(255,255,255,.45)}
.terminal-body{padding:24px 22px 26px;font-family:var(--font-mono);font-size:13.5px;line-height:2}
.terminal-body .ln{display:flex;gap:12px;color:#c6d4e2;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.terminal-body .ln .p{color:#00d2d3;flex-shrink:0}
.terminal-body .ln .c{color:rgba(255,255,255,.35);flex-shrink:0}
.terminal-body .ok{color:#28c840;font-weight:600}
.terminal-body .run{color:#ffd75e;font-weight:600}
.terminal-body .ln{cursor:text;opacity:0;transform:translateY(6px);animation:line-in .5s var(--ease) forwards}
.terminal-body .ln:nth-child(1){animation-delay:.2s}
.terminal-body .ln:nth-child(2){animation-delay:.7s}
.terminal-body .ln:nth-child(3){animation-delay:1.2s}
.terminal-body .ln:nth-child(4){animation-delay:1.7s}
.terminal-body .ln:nth-child(5){animation-delay:2.2s}
.terminal-body .ln:nth-child(6){animation-delay:2.7s}
.terminal-body .ln:nth-child(7){animation-delay:3.2s}
@keyframes line-in{to{opacity:1;transform:none}}
.cursor{
  display:inline-block;width:8px;height:16px;margin-left:2px;vertical-align:-2px;
  background:var(--accent-2);animation:blink 1.1s steps(1) infinite;
}
@keyframes blink{50%{opacity:0}}
.glow{
  position:absolute;inset:auto -12% -30% -12%;height:60%;pointer-events:none;
  background:radial-gradient(ellipse at center,rgba(0,210,211,.28),transparent 70%);
  filter:blur(30px);
}

/* 数据条 */
.stats{
  position:relative;margin:76px auto 0;padding:40px 0;
  border-top:1px solid var(--line);background:rgba(255,255,255,.6);
  -webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);
}
.stats-grid{
  max-width:var(--container);margin:0 auto;padding:0 24px;
  display:grid;grid-template-columns:repeat(4,1fr);gap:32px;text-align:center;
}
.stat-num{
  font-size:clamp(30px,3.4vw,42px);font-weight:800;letter-spacing:-1px;line-height:1.1;
  background:linear-gradient(135deg,var(--primary),var(--accent));
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;
}
.stat-lbl{font-size:13.5px;color:var(--muted);margin-top:8px}

/* ============ 通用板块 ============ */
.section{padding:110px 0;position:relative}
[id]{scroll-margin-top:calc(var(--nav-h) + 14px)}
.section-alt{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{max-width:720px;margin:0 auto 64px;text-align:center}
.section-head.left{margin:0 0 48px;text-align:left}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;font-size:13px;font-weight:700;
  letter-spacing:3px;color:#0b5bb5;text-transform:uppercase;margin-bottom:16px;
}
.eyebrow::before,.eyebrow::after{content:"";width:26px;height:1.5px;background:linear-gradient(90deg,var(--accent),var(--accent-2));border-radius:2px}
.section-head h2{
  font-size:clamp(28px,3.4vw,42px);font-weight:800;letter-spacing:-1px;color:var(--dark);
  margin-bottom:16px;line-height:1.25;
}
.section-head p{font-size:16.5px;color:var(--muted)}

/* 进入视口动画（仅在 JS 启用时生效） */
.js .reveal{opacity:0;transform:translateY(26px);transition:opacity .7s var(--ease),transform .7s var(--ease)}
.js .reveal.in{opacity:1;transform:none}
.js .reveal.d1{transition-delay:.08s}
.js .reveal.d2{transition-delay:.16s}
.js .reveal.d3{transition-delay:.24s}
.js .reveal.d4{transition-delay:.32s}
.js .reveal.d5{transition-delay:.4s}

/* ============ 关于我们 ============ */
.about-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:72px;align-items:start}
.about-txt h3{font-size:22px;font-weight:700;color:var(--dark);margin-bottom:14px}
.about-txt p{color:var(--muted);font-size:15.5px;margin-bottom:14px}
.about-points{list-style:none;margin-top:26px;display:flex;flex-direction:column;gap:15px}
.about-points li{display:flex;gap:12px;align-items:flex-start;font-size:15px;color:var(--ink)}
.about-points .tick{
  flex-shrink:0;width:24px;height:24px;margin-top:2px;border-radius:50%;
  background:linear-gradient(135deg,var(--accent),var(--accent-2));color:#fff;
  display:grid;place-items:center;font-size:12px;font-weight:700;
}
.profile-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow-md);overflow:hidden;position:relative;
}
.profile-card::before{content:"";display:block;height:6px;background:var(--grad)}
.profile-head{padding:26px 28px 18px;border-bottom:1px solid var(--line);display:flex;align-items:center;gap:14px}
.profile-head .avatar{
  width:52px;height:52px;border-radius:14px;background:var(--grad);color:#fff;
  display:grid;place-items:center;font-size:24px;font-weight:800;font-family:var(--font-mono);
}
.profile-head .cn{font-size:17px;font-weight:700;color:var(--dark)}
.profile-head .en{font-size:12px;color:var(--muted)}
.profile-body{padding:8px 28px 24px}
.profile-body dl{font-size:14px}
.profile-body .row{display:flex;gap:16px;padding:13px 0;border-bottom:1px dashed var(--line)}
.profile-body .row:last-child{border-bottom:none}
.profile-body dt{flex-shrink:0;width:64px;color:var(--muted)}
.profile-body dd{color:var(--ink);font-weight:500}

/* ============ 业务范围 ============ */
.biz-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:22px}
.biz-card{
  position:relative;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:30px 24px;transition:transform .3s var(--ease),box-shadow .3s, border-color .3s;
  overflow:hidden;
}
.biz-card::before{
  content:"";position:absolute;top:0;left:0;right:0;height:3px;
  background:linear-gradient(90deg,var(--accent),var(--accent-2));
  transform:scaleX(0);transform-origin:left;transition:transform .35s var(--ease);
}
.biz-card::after{
  content:"";position:absolute;right:-40px;bottom:-40px;width:120px;height:120px;border-radius:50%;
  background:radial-gradient(circle,rgba(0,210,211,.12),transparent 70%);
  opacity:0;transition:opacity .35s;
}
.biz-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg);border-color:rgba(30,144,255,.25)}
.biz-card:hover::before{transform:scaleX(1)}
.biz-card:hover::after{opacity:1}
.biz-icon{
  width:52px;height:52px;border-radius:14px;display:grid;place-items:center;margin-bottom:18px;
  background:var(--grad-soft);color:var(--accent);
}
.biz-icon svg{width:26px;height:26px;stroke:currentColor}
.biz-card h3{font-size:16.5px;font-weight:700;color:var(--dark);margin-bottom:8px}
.biz-card p{font-size:13.5px;color:var(--muted);line-height:1.65}

/* ============ 核心优势 ============ */
.why-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.why-item{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:34px 28px;transition:transform .3s var(--ease),box-shadow .3s,border-color .3s;
  display:flex;flex-direction:column;gap:14px;
}
.why-item:hover{transform:translateY(-5px);box-shadow:var(--shadow-md);border-color:rgba(30,144,255,.22)}
.why-icon{
  width:50px;height:50px;border-radius:50%;
  background:linear-gradient(135deg,var(--primary),var(--accent));
  color:#fff;display:grid;place-items:center;font-size:20px;font-weight:800;
  box-shadow:0 8px 20px rgba(10,61,98,.22);
}
.why-item h3{font-size:17.5px;font-weight:700;color:var(--dark)}
.why-item p{font-size:14.5px;color:var(--muted);line-height:1.7}

/* ============ 合作流程 ============ */
.steps{display:grid;grid-template-columns:repeat(5,1fr);gap:0;position:relative}
.steps::before{
  content:"";position:absolute;top:34px;left:10%;right:10%;height:2px;
  background:linear-gradient(90deg,var(--accent),var(--accent-2));opacity:.25;
}
.step{position:relative;text-align:center;padding:0 14px}
.step-dot{
  position:relative;z-index:1;width:68px;height:68px;margin:0 auto 20px;border-radius:50%;
  background:#fff;border:2px solid var(--line);display:grid;place-items:center;
  font-size:24px;font-weight:800;color:var(--accent);
  box-shadow:var(--shadow-sm);transition:transform .3s var(--ease),border-color .3s;
}
.step:hover .step-dot{transform:scale(1.08);border-color:var(--accent)}
.step h3{font-size:16.5px;font-weight:700;color:var(--dark);margin-bottom:8px}
.step p{font-size:13.5px;color:var(--muted);line-height:1.6}

/* ============ CTA ============ */
.cta-band{position:relative;overflow:hidden;padding:0 24px}
.cta-inner{
  max-width:1100px;margin:0 auto;border-radius:28px;padding:72px 56px;text-align:center;
  background:linear-gradient(135deg,#0a3d62 0%,#15598a 45%,#1e90ff 100%);
  box-shadow:0 30px 80px rgba(10,61,98,.35);position:relative;overflow:hidden;
}
.cta-inner::before{
  content:"";position:absolute;top:-40%;right:-8%;width:380px;height:380px;border-radius:50%;
  background:radial-gradient(circle,rgba(0,210,211,.35),transparent 70%);
}
.cta-inner::after{
  content:"";position:absolute;bottom:-50%;left:-6%;width:340px;height:340px;border-radius:50%;
  background:radial-gradient(circle,rgba(30,144,255,.4),transparent 70%);
}
.cta-inner h2{position:relative;font-size:clamp(26px,3.4vw,38px);font-weight:800;color:#fff;margin-bottom:16px;letter-spacing:-.5px}
.cta-inner p{position:relative;font-size:16.5px;color:rgba(255,255,255,.85);margin-bottom:34px}
.cta-inner .btn-white{
  position:relative;display:inline-flex;align-items:center;gap:9px;
  padding:16px 42px;border-radius:100px;background:#fff;color:var(--primary);
  font-size:16.5px;font-weight:700;transition:transform .2s var(--ease),box-shadow .2s;
  box-shadow:0 14px 34px rgba(0,0,0,.25);
}
.cta-inner .btn-white:hover{transform:translateY(-3px);box-shadow:0 20px 44px rgba(0,0,0,.32)}

/* ============ FAQ ============ */
.faq-list{max-width:820px;margin:0 auto;display:flex;flex-direction:column;gap:16px}
.faq-item{
  background:var(--card);border:1px solid var(--line);border-radius:16px;overflow:hidden;
  transition:border-color .3s,box-shadow .3s;
}
.faq-item[open]{border-color:rgba(30,144,255,.3);box-shadow:var(--shadow-sm)}
.faq-item summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;
  gap:16px;padding:22px 26px;font-size:16px;font-weight:600;color:var(--dark);
  -webkit-tap-highlight-color:transparent;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary .faq-icon{
  flex-shrink:0;width:26px;height:26px;border-radius:50%;display:grid;place-items:center;
  background:var(--grad-soft);color:var(--accent);font-size:16px;font-weight:700;
  transition:transform .3s var(--ease),background .3s,color .3s;
}
.faq-item[open] summary .faq-icon{transform:rotate(45deg);background:linear-gradient(135deg,var(--accent),var(--accent-2));color:#fff}
.faq-item .faq-a{padding:0 26px 24px;font-size:14.5px;color:var(--muted);line-height:1.8}

/* ============ 联系我们 ============ */
.contact-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px;margin-bottom:32px}
.contact-card{
  display:flex;gap:18px;align-items:flex-start;padding:30px 28px;border-radius:var(--radius);
  background:var(--card);border:1px solid var(--line);transition:transform .3s var(--ease),box-shadow .3s,border-color .3s;
}
.contact-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:rgba(30,144,255,.25)}
.contact-card .icon{
  flex-shrink:0;width:48px;height:48px;border-radius:13px;display:grid;place-items:center;
  background:linear-gradient(135deg,var(--accent),var(--accent-2));color:#fff;
}
.contact-card .icon svg{width:22px;height:22px;stroke:currentColor}
.contact-card .lbl{font-size:12px;letter-spacing:1.5px;font-weight:700;color:var(--muted);text-transform:uppercase;margin-bottom:6px}
.contact-card .val{font-size:16px;font-weight:600;color:var(--dark);line-height:1.6;overflow-wrap:anywhere}
.contact-card .val a{color:#0b5bb5}
.contact-card .val a:hover{opacity:.75}
.contact-mail{
  text-align:center;padding:44px 32px;border-radius:var(--radius);
  background:linear-gradient(135deg,rgba(30,144,255,.07),rgba(0,210,211,.07));
  border:1px dashed rgba(30,144,255,.35);
}
.contact-mail p{color:var(--muted);font-size:15px;margin-bottom:14px}
.contact-mail a{
  display:inline-flex;align-items:center;gap:10px;font-size:clamp(18px,2.4vw,24px);font-weight:800;
  background:linear-gradient(135deg,#0a3d62,#0e6fd0);
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;
}
.contact-mail a:hover{opacity:.8}

/* ============ 页脚 ============ */
.footer{background:var(--dark);color:#9fb0c3;padding:76px 0 0;margin-top:110px}
.footer-grid{
  max-width:var(--container);margin:0 auto;padding:0 24px;
  display:grid;grid-template-columns:1.6fr 1fr 1.2fr;gap:56px;
}
.footer h3{color:#fff;font-size:15px;font-weight:700;margin-bottom:20px;letter-spacing:1px}
.footer .brand .logo-en{font-size:30px}
.footer .brand .logo-cn{font-size:20px}
.footer .brand p{margin-top:18px;font-size:14px;line-height:1.9;max-width:340px}
.footer ul{list-style:none;display:flex;flex-direction:column;gap:12px}
.footer ul a{font-size:14px;color:#9fb0c3;transition:color .2s,padding-left .2s}
.footer ul a:hover{color:var(--accent-2);padding-left:4px}
.footer-contact li{display:flex;gap:10px;font-size:14px;line-height:1.7}
.footer-contact a{color:#9fb0c3}
.footer-contact a:hover{color:var(--accent-2)}
.footer-contact .fc-ic{color:var(--accent-2);flex-shrink:0}
.footer-bottom{
  margin-top:64px;border-top:1px solid rgba(255,255,255,.08);padding:24px;
  text-align:center;font-size:13.5px;color:#7c8ba0;
}
.footer-bottom .beian{display:inline-flex;gap:22px;flex-wrap:wrap;justify-content:center;align-items:center}
.footer-bottom a{color:#7c8ba0;transition:color .2s}
.footer-bottom a:hover{color:var(--accent-2)}
.footer-bottom .sep{opacity:.4}

/* ============ 回到顶部 ============ */
.to-top{
  position:fixed;right:26px;bottom:26px;z-index:150;width:48px;height:48px;border-radius:50%;
  border:0;background:linear-gradient(135deg,var(--accent),var(--accent-2));color:#fff;
  display:grid;place-items:center;box-shadow:0 12px 30px rgba(30,144,255,.4);
  opacity:0;visibility:hidden;transform:translateY(12px);
  transition:opacity .3s,transform .3s,visibility .3s;
}
.to-top.show{opacity:1;visibility:visible;transform:none}
.to-top:hover{transform:translateY(-3px)}

/* ============ 404 ============ */
.e404{min-height:100vh;display:grid;place-items:center;padding:40px 24px;text-align:center;background:var(--bg)}
.e404 .code{
  font-size:clamp(90px,18vw,160px);font-weight:900;line-height:1;letter-spacing:-6px;
  background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;
}
.e404 h1{font-size:24px;color:var(--dark);margin:18px 0 12px}
.e404 p{color:var(--muted);margin-bottom:34px}

/* ============ 响应式 ============ */
@media (max-width:1080px){
  .biz-grid{grid-template-columns:repeat(3,1fr)}
}
@media (max-width:920px){
  .menu-btn{display:flex}
  .nav-links{
    position:fixed;top:var(--nav-h);left:0;right:0;z-index:-1;
    background:rgba(255,255,255,.98);-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);
    flex-direction:column;gap:0;padding:10px 0 18px;border-top:1px solid var(--line);
    box-shadow:0 20px 40px rgba(10,61,98,.12);
    transform:translateY(-115%);transition:transform .35s var(--ease);
  }
  .nav-links.open{transform:translateY(0)}
  .nav-links li{width:100%;border-bottom:1px solid var(--line)}
  .nav-links li:last-child{border-bottom:none}
  .nav-links a{display:block;padding:15px 28px;font-size:15.5px;color:var(--ink)}
  .nav-links a::after{display:none}
  .nav-cta{margin:14px 28px 0;text-align:center}
  .hero-grid{grid-template-columns:1fr;gap:48px}
  .hero-txt{padding-bottom:0}
  .terminal-wrap{max-width:560px;padding-bottom:0}
  .about-grid{grid-template-columns:1fr;gap:44px}
  .why-grid{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:1fr;gap:26px}
  .steps::before{display:none}
  .step{display:flex;text-align:left;gap:20px;align-items:flex-start}
  .step-dot{width:56px;height:56px;margin:0;font-size:20px;flex-shrink:0}
  .footer-grid{grid-template-columns:1fr 1fr;gap:40px}
}
@media (max-width:620px){
  .section{padding:80px 0}
  .biz-grid{grid-template-columns:repeat(2,1fr);gap:14px}
  .biz-card{padding:22px 16px;border-radius:16px}
  .biz-icon{width:44px;height:44px;border-radius:12px;margin-bottom:14px}
  .biz-icon svg{width:22px;height:22px}
  .biz-card h3{font-size:15px}
  .biz-card p{font-size:12.5px}
  .stats-grid{grid-template-columns:repeat(2,1fr);gap:26px 16px}
  .stats{margin-top:52px;padding:32px 0}
  .hero{padding-top:calc(var(--nav-h) + 56px)}
  .hero-actions{flex-direction:column;align-items:stretch}
  .hero-actions .btn{justify-content:center}
  .cta-inner{padding:52px 26px;border-radius:22px}
  .contact-grid{grid-template-columns:1fr;gap:14px}
  .contact-card{padding:24px 20px;border-radius:16px}
  .why-grid{grid-template-columns:1fr;gap:16px}
  .why-item{padding:26px 22px}
  .faq-item summary{padding:18px 20px;font-size:15px}
  .faq-item .faq-a{padding:0 20px 20px;font-size:13.5px}
  .footer-grid{grid-template-columns:1fr;gap:34px}
  .footer{padding-top:60px;margin-top:80px}
  .footer-bottom .beian{flex-direction:column;gap:8px}
  .footer-bottom .sep{display:none}
  .to-top{right:16px;bottom:16px;width:44px;height:44px}
}