:root{
  --brand:#ff6a00;
  --brand-2:#ffb300;
  --brand-3:#ff3d71;
  --brand-4:#7b2ff7;
  --ink:#1a1a2e;
  --ink-2:#3d3d5c;
  --muted:#6b6b85;
  --bg:#ffffff;
  --bg-2:#f7f8fc;
  --bg-3:#eef1f8;
  --line:#e3e7f0;
  --glass:rgba(255,255,255,.62);
  --glass-border:rgba(255,255,255,.55);
  --shadow:0 8px 30px rgba(26,26,46,.08);
  --shadow-lg:0 18px 50px rgba(26,26,46,.14);
  --radius:16px;
  --radius-sm:12px;
  --radius-lg:22px;
  --ease:cubic-bezier(.22,.61,.36,1);
}
html[data-theme="dark"]{
  --ink:#f2f4fa;
  --ink-2:#c9cde0;
  --muted:#9aa0bd;
  --bg:#0f1220;
  --bg-2:#161a2c;
  --bg-3:#1d2238;
  --line:#2a3050;
  --glass:rgba(22,26,44,.6);
  --glass-border:rgba(255,255,255,.08);
  --shadow:0 8px 30px rgba(0,0,0,.4);
  --shadow-lg:0 18px 50px rgba(0,0,0,.55);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Segoe UI",Roboto,sans-serif;
  color:var(--ink);
  background:var(--bg);
  line-height:1.8;
  font-size:16px;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  transition:background .3s var(--ease),color .3s var(--ease);
  overflow-x:hidden;
}
img,svg{display:block;max-width:100%}
a{color:inherit;text-decoration:none;transition:color .2s var(--ease)}
ul,ol{list-style:none}
button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit}
input,textarea{font-family:inherit}
::selection{background:rgba(255,106,0,.25);color:var(--ink)}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);border:0}

/* ===== 顶部信息条 ===== */
.topbar{background:linear-gradient(90deg,var(--brand),var(--brand-3));color:#fff;font-size:13px;position:relative;z-index:101}
.topbar .container{display:flex;justify-content:space-between;align-items:center;min-height:38px;flex-wrap:wrap;gap:8px;padding-top:4px;padding-bottom:4px}
.topbar-info{display:flex;gap:18px;flex-wrap:wrap}
.topbar a:hover{text-decoration:underline}
.topbar-actions{display:flex;gap:14px;align-items:center}
.theme-toggle{display:inline-flex;align-items:center;gap:6px;background:rgba(255,255,255,.18);padding:4px 12px;border-radius:20px;font-size:12px;transition:background .25s var(--ease),transform .25s var(--ease);white-space:nowrap}
.theme-toggle:hover{background:rgba(255,255,255,.32);transform:translateY(-1px)}

/* ===== 导航 ===== */
.nav{position:sticky;top:0;z-index:100;background:var(--glass);-webkit-backdrop-filter:blur(18px) saturate(160%);backdrop-filter:blur(18px) saturate(160%);border-bottom:1px solid var(--line);box-shadow:0 2px 12px rgba(0,0,0,.04);transition:background .3s var(--ease)}
.nav .container{display:flex;align-items:center;justify-content:space-between;height:72px;gap:20px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:20px;letter-spacing:.5px;flex-shrink:0}
.brand-mark{width:40px;height:40px;border-radius:12px;background:linear-gradient(135deg,var(--brand),var(--brand-3));display:grid;place-items:center;color:#fff;font-size:20px;font-weight:900;box-shadow:0 6px 16px rgba(255,106,0,.35);transition:transform .35s var(--ease)}
.brand:hover .brand-mark{transform:rotate(-8deg) scale(1.06)}
.brand-text small{display:block;font-size:11px;font-weight:500;color:var(--muted);letter-spacing:1px;line-height:1.2}
.nav-links{display:flex;gap:4px;align-items:center}
.nav-links a{padding:8px 13px;border-radius:10px;font-size:15px;font-weight:500;color:var(--ink-2);transition:background .2s var(--ease),color .2s var(--ease),transform .2s var(--ease);white-space:nowrap;position:relative}
.nav-links a::after{content:"";position:absolute;left:50%;bottom:4px;width:0;height:2px;border-radius:2px;background:linear-gradient(90deg,var(--brand),var(--brand-3));transform:translateX(-50%);transition:width .25s var(--ease)}
.nav-links a:hover{background:var(--bg-3);color:var(--brand);transform:translateY(-1px)}
.nav-links a:hover::after{width:60%}
.nav-tools{display:flex;align-items:center;gap:10px}
.search-box{display:flex;align-items:center;background:var(--bg-2);border:1px solid var(--line);border-radius:24px;padding:4px 4px 4px 16px;transition:border-color .25s var(--ease),box-shadow .25s var(--ease)}
.search-box:focus-within{border-color:var(--brand);box-shadow:0 0 0 3px rgba(255,106,0,.14)}
.search-box input{border:none;background:none;outline:none;color:var(--ink);font-size:14px;width:150px;padding:6px 0}
.search-box input::placeholder{color:var(--muted)}
.search-box button{background:linear-gradient(135deg,var(--brand),var(--brand-3));color:#fff;border-radius:20px;padding:7px 16px;font-size:13px;font-weight:600;transition:opacity .2s var(--ease),transform .2s var(--ease)}
.search-box button:hover{opacity:.92;transform:scale(1.03)}
.menu-toggle{display:none;width:42px;height:42px;border-radius:10px;background:var(--bg-2);align-items:center;justify-content:center;flex-direction:column;gap:5px;transition:background .2s var(--ease)}
.menu-toggle span{width:20px;height:2px;background:var(--ink);border-radius:2px;transition:transform .3s var(--ease),opacity .3s var(--ease)}
.menu-toggle.active span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.menu-toggle.active span:nth-child(2){opacity:0}
.menu-toggle.active span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ===== 面包屑 ===== */
.breadcrumb{background:var(--bg-2);border-bottom:1px solid var(--line);font-size:13px;color:var(--muted)}
.breadcrumb .container{padding:12px 20px;display:flex;gap:8px;flex-wrap:wrap;align-items:center}
.breadcrumb a:hover{color:var(--brand)}
.breadcrumb .sep{color:var(--line)}

/* ===== Banner 轮播 ===== */
.hero{position:relative;background:linear-gradient(135deg,#1a1a2e 0%,#2d1b4e 50%,#4a1d3a 100%);color:#fff;overflow:hidden}
.hero::before{content:"";position:absolute;inset:0;background:radial-gradient(circle at 80% 20%,rgba(255,106,0,.35),transparent 55%),radial-gradient(circle at 15% 80%,rgba(255,61,113,.28),transparent 50%);pointer-events:none;animation:heroGlow 12s ease-in-out infinite alternate}
@keyframes heroGlow{
  0%{opacity:.85;transform:scale(1)}
  100%{opacity:1;transform:scale(1.08)}
}
.hero-slides{position:relative;min-height:460px}
.hero-slide{position:absolute;inset:0;opacity:0;visibility:hidden;transition:opacity .8s var(--ease),visibility .8s var(--ease)}
.hero-slide.active{opacity:1;visibility:visible;position:relative}
.hero-slide .container{display:grid;grid-template-columns:1.1fr .9fr;gap:40px;align-items:center;padding:60px 20px;position:relative;z-index:2}
.hero-slide.active .hero-content{animation:heroIn .9s var(--ease) both}
.hero-slide.active .hero-visual{animation:heroIn .9s .12s var(--ease) both}
@keyframes heroIn{
  from{opacity:0;transform:translateY(28px)}
  to{opacity:1;transform:translateY(0)}
}
.hero-tag{display:inline-flex;align-items:center;gap:8px;background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.22);padding:6px 16px;border-radius:30px;font-size:13px;margin-bottom:20px;-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px)}
.hero-tag::before{content:"";width:8px;height:8px;border-radius:50%;background:var(--brand-2);box-shadow:0 0 12px var(--brand-2);animation:pulseDot 2s ease-in-out infinite}
@keyframes pulseDot{
  0%,100%{transform:scale(1);opacity:1}
  50%{transform:scale(1.35);opacity:.7}
}
.hero h1{font-size:clamp(28px,4vw,46px);line-height:1.25;font-weight:900;margin-bottom:18px;letter-spacing:-.5px}
.hero h1 em{font-style:normal;background:linear-gradient(90deg,var(--brand-2),var(--brand-3));-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p{font-size:16px;color:rgba(255,255,255,.82);max-width:560px;margin-bottom:28px}
.hero-btns{display:flex;gap:14px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;gap:8px;padding:13px 28px;border-radius:30px;font-weight:700;font-size:15px;transition:transform .25s var(--ease),box-shadow .25s var(--ease),background .25s var(--ease)}
.btn-primary{background:linear-gradient(135deg,var(--brand),var(--brand-3));color:#fff;box-shadow:0 10px 26px rgba(255,61,113,.4)}
.btn-primary:hover{transform:translateY(-3px);box-shadow:0 16px 36px rgba(255,61,113,.55)}
.btn-ghost{background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.3);color:#fff;-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px)}
.btn-ghost:hover{background:rgba(255,255,255,.22);transform:translateY(-3px)}
.hero-visual{position:relative;display:grid;place-items:center}
.hero-visual svg{width:100%;max-width:420px;filter:drop-shadow(0 20px 40px rgba(0,0,0,.4));animation:floatY 6s ease-in-out infinite}
@keyframes floatY{
  0%,100%{transform:translateY(0)}
  50%{transform:translateY(-14px)}
}
.hero-dots{position:absolute;bottom:22px;left:50%;transform:translateX(-50%);display:flex;gap:10px;z-index:5}
.hero-dots button{width:10px;height:10px;border-radius:50%;background:rgba(255,255,255,.35);transition:width .3s var(--ease),background .3s var(--ease)}
.hero-dots button:hover{background:rgba(255,255,255,.6)}
.hero-dots button.active{width:30px;border-radius:6px;background:var(--brand-2)}
.hero-stats{display:flex;gap:36px;margin-top:34px;flex-wrap:wrap}
.hero-stats .stat b{font-size:28px;font-weight:900;background:linear-gradient(90deg,var(--brand-2),var(--brand-3));-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-stats .stat span{display:block;font-size:13px;color:rgba(255,255,255,.7)}

/* ===== 通用区块 ===== */
section{padding:72px 0;position:relative}
.section-head{text-align:center;max-width:760px;margin:0 auto 48px}
.section-tag{display:inline-block;font-size:13px;font-weight:700;color:var(--brand);letter-spacing:2px;text-transform:uppercase;margin-bottom:12px}
.section-head h2{font-size:clamp(24px,3vw,34px);font-weight:900;line-height:1.3;margin-bottom:14px;letter-spacing:-.5px}
.section-head p{color:var(--muted);font-size:15px}
.bg-alt{background:var(--bg-2)}

/* ===== 品牌介绍 ===== */
.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.about-text h2{font-size:clamp(24px,3vw,32px);font-weight:900;margin-bottom:18px;line-height:1.3}
.about-text h2 em{font-style:normal;color:var(--brand)}
.about-text p{color:var(--ink-2);margin-bottom:16px;font-size:15.5px}
.about-features{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:24px}
.about-feature{background:var(--bg);border:1px solid var(--line);border-radius:14px;padding:18px;transition:transform .3s var(--ease),box-shadow .3s var(--ease),border-color .3s var(--ease)}
.about-feature:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:rgba(255,106,0,.35)}
.about-feature .icon{width:42px;height:42px;border-radius:12px;background:linear-gradient(135deg,rgba(255,106,0,.15),rgba(255,61,113,.15));display:grid;place-items:center;margin-bottom:12px;color:var(--brand);font-size:20px}
.about-feature h4{font-size:15px;font-weight:800;margin-bottom:6px}
.about-feature p{font-size:13px;color:var(--muted);margin:0}
.about-visual{position:relative}
.about-visual svg{width:100%;border-radius:var(--radius);box-shadow:var(--shadow-lg);transition:transform .5s var(--ease)}
.about-visual:hover svg{transform:scale(1.02)}

/* ===== 数字动画 ===== */
.stats-band{background:linear-gradient(135deg,var(--brand),var(--brand-3));color:#fff;padding:56px 0;position:relative;overflow:hidden}
.stats-band::before{content:"";position:absolute;inset:0;background:radial-gradient(circle at 20% 30%,rgba(255,255,255,.18),transparent 45%),radial-gradient(circle at 85% 70%,rgba(255,255,255,.12),transparent 40%);pointer-events:none}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:30px;text-align:center;position:relative;z-index:1}
.stats-grid .num{font-size:clamp(30px,4vw,46px);font-weight:900;line-height:1;margin-bottom:8px}
.stats-grid .num small{font-size:.5em;font-weight:700;margin-left:2px}
.stats-grid .label{font-size:14px;opacity:.9}

/* ===== 产品卡片 ===== */
.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.card{background:var(--bg);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:transform .35s var(--ease),box-shadow .35s var(--ease),border-color .35s var(--ease);display:flex;flex-direction:column}
.card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg);border-color:transparent}
.card-media{position:relative;aspect-ratio:16/10;background:linear-gradient(135deg,var(--bg-3),var(--bg-2));overflow:hidden}
.card-media svg{width:100%;height:100%;object-fit:cover;transition:transform .6s var(--ease)}
.card:hover .card-media svg{transform:scale(1.06)}
.card-badge{position:absolute;top:14px;left:14px;background:rgba(0,0,0,.65);color:#fff;font-size:12px;padding:4px 12px;border-radius:20px;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);font-weight:600}
.card-body{padding:22px;flex:1;display:flex;flex-direction:column}
.card-body h3{font-size:18px;font-weight:800;margin-bottom:10px}
.card-body p{font-size:14px;color:var(--muted);flex:1;margin-bottom:16px}
.card-meta{display:flex;justify-content:space-between;align-items:center;font-size:13px;color:var(--muted);border-top:1px solid var(--line);padding-top:14px}
.card-meta a{color:var(--brand);font-weight:700;transition:transform .2s var(--ease)}
.card-meta a:hover{text-decoration:underline;transform:translateX(3px)}

/* ===== 解决方案 ===== */
.solutions-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:26px}
.solution-item{display:flex;gap:20px;background:var(--bg);border:1px solid var(--line);border-radius:var(--radius);padding:28px;transition:transform .3s var(--ease),box-shadow .3s var(--ease),border-color .3s var(--ease)}
.solution-item:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:rgba(255,106,0,.3)}
.solution-icon{flex-shrink:0;width:56px;height:56px;border-radius:16px;background:linear-gradient(135deg,var(--brand),var(--brand-3));display:grid;place-items:center;color:#fff;font-size:24px;transition:transform .35s var(--ease)}
.solution-item:hover .solution-icon{transform:rotate(-8deg) scale(1.08)}
.solution-item h3{font-size:17px;font-weight:800;margin-bottom:8px}
.solution-item p{font-size:14px;color:var(--muted)}

/* ===== 案例/评价 ===== */
.case-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.case{background:var(--bg);border:1px solid var(--line);border-radius:var(--radius);padding:26px;transition:transform .3s var(--ease),box-shadow .3s var(--ease),border-color .3s var(--ease)}
.case:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:rgba(255,106,0,.3)}
.case-head{display:flex;align-items:center;gap:12px;margin-bottom:16px}
.case-avatar{width:48px;height:48px;border-radius:50%;background:linear-gradient(135deg,var(--brand-2),var(--brand-3));display:grid;place-items:center;color:#fff;font-weight:800;font-size:18px;flex-shrink:0}
.case-head b{display:block;font-size:15px}
.case-head span{font-size:12px;color:var(--muted)}
.case p{font-size:14px;color:var(--ink-2);margin-bottom:14px}
.case .result{font-size:13px;color:var(--brand);font-weight:700}
.stars{color:#ffb300;font-size:14px;letter-spacing:2px;margin-bottom:8px}

/* ===== 新闻/文章 ===== */
.article-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.article-card{display:flex;gap:18px;background:var(--bg);border:1px solid var(--line);border-radius:var(--radius);padding:20px;transition:transform .3s var(--ease),box-shadow .3s var(--ease),border-color .3s var(--ease)}
.article-card:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:rgba(255,106,0,.3)}
.article-thumb{flex-shrink:0;width:88px;height:88px;border-radius:12px;overflow:hidden;background:var(--bg-3)}
.article-thumb svg{width:100%;height:100%;transition:transform .5s var(--ease)}
.article-card:hover .article-thumb svg{transform:scale(1.1)}
.article-info{flex:1;min-width:0}
.article-info .cat{font-size:12px;color:var(--brand);font-weight:700;margin-bottom:4px}
.article-info h3{font-size:15.5px;font-weight:800;margin-bottom:6px;line-height:1.45}
.article-info h3 a:hover{color:var(--brand)}
.article-info p{font-size:13px;color:var(--muted);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;margin-bottom:8px}
.article-info time{font-size:12px;color:var(--muted)}

/* ===== HowTo ===== */
.howto-wrap{display:grid;grid-template-columns:.9fr 1.1fr;gap:48px;align-items:start}
.howto-side h2{font-size:clamp(24px,3vw,32px);font-weight:900;margin-bottom:16px;line-height:1.3}
.howto-side p{color:var(--ink-2);font-size:15px;margin-bottom:20px}
.howto-meta{display:flex;flex-direction:column;gap:12px}
.howto-meta div{display:flex;gap:12px;align-items:flex-start;font-size:14px;color:var(--ink-2)}
.howto-meta .dot{flex-shrink:0;width:26px;height:26px;border-radius:8px;background:linear-gradient(135deg,var(--brand),var(--brand-3));display:grid;place-items:center;color:#fff;font-size:13px;font-weight:800}
.howto-steps{display:flex;flex-direction:column;gap:18px}
.step{display:flex;gap:18px;background:var(--bg);border:1px solid var(--line);border-radius:var(--radius);padding:22px;transition:border-color .3s var(--ease),box-shadow .3s var(--ease),transform .3s var(--ease)}
.step:hover{border-color:var(--brand);box-shadow:var(--shadow);transform:translateX(4px)}
.step-num{flex-shrink:0;width:44px;height:44px;border-radius:12px;background:linear-gradient(135deg,var(--brand),var(--brand-3));display:grid;place-items:center;color:#fff;font-weight:900;font-size:17px}
.step h4{font-size:16px;font-weight:800;margin-bottom:6px}
.step p{font-size:14px;color:var(--muted)}

/* ===== FAQ ===== */
.faq-list{max-width:900px;margin:0 auto;display:flex;flex-direction:column;gap:14px}
.faq-item{background:var(--bg);border:1px solid var(--line);border-radius:14px;overflow:hidden;transition:border-color .3s var(--ease),box-shadow .3s var(--ease)}
.faq-item.open{border-color:var(--brand);box-shadow:var(--shadow)}
.faq-item:hover{border-color:rgba(255,106,0,.4)}
.faq-q{width:100%;display:flex;justify-content:space-between;align-items:center;gap:16px;padding:20px 24px;text-align:left;font-size:15.5px;font-weight:700;color:var(--ink);transition:color .2s var(--ease)}
.faq-q:hover{color:var(--brand)}
.faq-q .plus{flex-shrink:0;width:26px;height:26px;border-radius:50%;background:var(--bg-3);display:grid;place-items:center;font-size:16px;color:var(--brand);transition:transform .3s var(--ease),background .3s var(--ease),color .3s var(--ease)}
.faq-item.open .faq-q .plus{transform:rotate(45deg);background:var(--brand);color:#fff}
.faq-a{max-height:0;overflow:hidden;transition:max-height .4s var(--ease)}
.faq-a p{padding:0 24px 22px;font-size:14.5px;color:var(--ink-2);line-height:1.85}

/* ===== 联系 ===== */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px}
.contact-info h2{font-size:clamp(24px,3vw,32px);font-weight:900;margin-bottom:16px}
.contact-info p{color:var(--muted);margin-bottom:24px;font-size:15px}
.contact-list{display:flex;flex-direction:column;gap:16px}
.contact-list li{display:flex;gap:14px;align-items:flex-start;font-size:14.5px;color:var(--ink-2)}
.contact-list .ci{flex-shrink:0;width:40px;height:40px;border-radius:12px;background:var(--bg-3);display:grid;place-items:center;color:var(--brand);font-size:18px;transition:background .25s var(--ease),transform .25s var(--ease)}
.contact-list li:hover .ci{background:linear-gradient(135deg,var(--brand),var(--brand-3));color:#fff;transform:scale(1.06)}
.contact-list b{display:block;font-size:13px;color:var(--muted);font-weight:500;margin-bottom:2px}
.contact-form{background:var(--bg);border:1px solid var(--line);border-radius:var(--radius);padding:32px;box-shadow:var(--shadow)}
.contact-form h3{font-size:18px;font-weight:800;margin-bottom:20px}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-bottom:16px}
.form-field{display:flex;flex-direction:column;gap:6px}
.form-field label{font-size:13px;color:var(--muted);font-weight:600}
.form-field input,.form-field textarea{background:var(--bg-2);border:1px solid var(--line);border-radius:10px;padding:11px 14px;font-size:14px;color:var(--ink);outline:none;transition:border-color .25s var(--ease),box-shadow .25s var(--ease);font-family:inherit}
.form-field input:focus,.form-field textarea:focus{border-color:var(--brand);box-shadow:0 0 0 3px rgba(255,106,0,.14)}
.form-field textarea{resize:vertical;min-height:100px}
.form-submit{width:100%;padding:13px;border-radius:10px;background:linear-gradient(135deg,var(--brand),var(--brand-3));color:#fff;font-weight:700;font-size:15px;transition:opacity .2s var(--ease),transform .2s var(--ease),box-shadow .2s var(--ease)}
.form-submit:hover{opacity:.94;transform:translateY(-2px);box-shadow:0 10px 26px rgba(255,61,113,.35)}

/* ===== 页脚 ===== */
.footer{background:var(--bg-2);border-top:1px solid var(--line);padding:56px 0 0;font-size:14px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:36px;padding-bottom:40px}
.footer-brand .brand{margin-bottom:16px}
.footer-brand p{color:var(--muted);font-size:13.5px;margin-bottom:16px;line-height:1.8}
.footer-social{display:flex;gap:10px}
.footer-social a{width:36px;height:36px;border-radius:10px;background:var(--bg-3);display:grid;place-items:center;color:var(--muted);transition:background .25s var(--ease),color .25s var(--ease),transform .25s var(--ease)}
.footer-social a:hover{background:var(--brand);color:#fff;transform:translateY(-3px)}
.footer-col h4{font-size:14px;font-weight:800;margin-bottom:16px;color:var(--ink)}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col a{color:var(--muted);font-size:13.5px;transition:color .2s var(--ease),padding-left .2s var(--ease)}
.footer-col a:hover{color:var(--brand);padding-left:4px}
.footer-bottom{border-top:1px solid var(--line);padding:22px 0;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:12px;font-size:13px;color:var(--muted)}
.footer-bottom-links{display:flex;gap:18px;flex-wrap:wrap}
.footer-bottom-links a:hover{color:var(--brand)}

/* ===== 返回顶部 ===== */
.back-top{position:fixed;right:24px;bottom:24px;width:48px;height:48px;border-radius:50%;background:linear-gradient(135deg,var(--brand),var(--brand-3));color:#fff;display:grid;place-items:center;box-shadow:0 10px 26px rgba(255,61,113,.4);opacity:0;visibility:hidden;transform:translateY(20px);transition:opacity .35s var(--ease),visibility .35s var(--ease),transform .35s var(--ease);z-index:90;font-size:20px;font-weight:700}
.back-top.show{opacity:1;visibility:visible;transform:translateY(0)}
.back-top:hover{transform:translateY(-4px) scale(1.05);box-shadow:0 14px 32px rgba(255,61,113,.55)}

/* ===== 滚动动画 ===== */
.reveal{opacity:0;transform:translateY(30px);transition:opacity .7s var(--ease),transform .7s var(--ease)}
.reveal.in{opacity:1;transform:translateY(0)}

/* ===== 响应式 ===== */
@media(max-width:1024px){
  .hero-slide .container{grid-template-columns:1fr;text-align:center;padding:48px 20px}
  .hero p{margin-left:auto;margin-right:auto}
  .hero-btns,.hero-stats{justify-content:center}
  .hero-visual{display:none}
  .about-grid,.howto-wrap,.contact-grid{grid-template-columns:1fr;gap:36px}
  .card-grid,.case-grid{grid-template-columns:repeat(2,1fr)}
  .article-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:768px){
  .nav-links{position:fixed;top:110px;left:0;right:0;background:var(--bg);flex-direction:column;padding:20px;gap:4px;border-bottom:1px solid var(--line);box-shadow:var(--shadow);transform:translateY(-140%);transition:transform .35s var(--ease);align-items:stretch;z-index:99;max-height:calc(100vh - 110px);overflow-y:auto}
  .nav-links.open{transform:translateY(0)}
  .nav-links a{padding:12px 16px}
  .nav-links a::after{display:none}
  .menu-toggle{display:flex}
  .search-box input{width:100px}
  .topbar-info{display:none}
  .topbar .container{justify-content:center}
  .stats-grid{grid-template-columns:repeat(2,1fr);gap:24px}
  .card-grid,.case-grid,.solutions-grid,.about-features{grid-template-columns:1fr}
  .form-row{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  section{padding:52px 0}
  .hero-slides{min-height:auto}
  .footer-bottom{flex-direction:column;text-align:center}
  .contact-form{padding:24px}
}
@media(max-width:480px){
  .search-box{display:none}
  .hero-stats{gap:20px}
  .hero-stats .stat b{font-size:22px}
  .hero-tag{font-size:12px;padding:5px 12px}
  .btn{padding:11px 22px;font-size:14px}
  .article-card{flex-direction:column}
  .article-thumb{width:100%;height:140px}
  .solution-item{padding:22px;gap:14px}
  .solution-icon{width:48px;height:48px;font-size:20px}
  .faq-q{padding:16px 18px;font-size:14.5px}
  .faq-a p{padding:0 18px 18px}
  .back-top{right:16px;bottom:16px;width:42px;height:42px}
}

/* ===== 减少动画偏好 ===== */
@media(prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms !important;animation-iteration-count:1 !important;transition-duration:.01ms !important;scroll-behavior:auto !important}
  .reveal{opacity:1;transform:none}
}

/* ===== 打印样式 ===== */
@media print{
  .topbar,.nav,.hero,.back-top,.footer-social,.contact-form{display:none !important}
  body{background:#fff;color:#000}
  .card,.case,.solution-item,.faq-item,.article-card{box-shadow:none;border:1px solid #ccc}
}