*{margin:0;padding:0;box-sizing:border-box}
:root{
  --bg:#f8f9fc;--surface:#ffffff;--surface-glass:rgba(255,255,255,0.72);
  --text:#1a1a2e;--text-secondary:#4a4a6a;
  --border:#e2e4ed;--border-glass:rgba(255,255,255,0.5);
  --accent:#e94560;--accent-dark:#c62a45;--accent-light:#ff6b81;
  --brand-gradient:linear-gradient(135deg,#1a1a2e 0%,#16213e 50%,#0f3460 100%);
  --accent-gradient:linear-gradient(135deg,#e94560 0%,#ff6b81 100%);
  --card-shadow:0 2px 12px rgba(26,26,46,0.06);
  --card-shadow-hover:0 16px 40px rgba(233,69,96,0.16);
  --radius:16px;--radius-sm:10px;--radius-pill:50px;
  --transition:0.35s cubic-bezier(0.4,0,0.2,1);
  --glass-blur:blur(18px) saturate(180%);
  --nav-h:64px;
}
body.dark-mode{
  --bg:#0f0f1a;--surface:#1a1a2e;--surface-glass:rgba(26,26,46,0.72);
  --text:#eaeaf2;--text-secondary:#a0a0b8;
  --border:#2a2a4a;--border-glass:rgba(255,255,255,0.08);
  --card-shadow:0 2px 12px rgba(0,0,0,0.3);
  --card-shadow-hover:0 16px 40px rgba(233,69,96,0.24);
}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Helvetica Neue",Helvetica,Arial,sans-serif;
  background:var(--bg);color:var(--text);line-height:1.8;font-size:16px;
  -webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;
  transition:background var(--transition),color var(--transition);
  overflow-x:hidden;
}
body::before{
  content:'';position:fixed;inset:0;z-index:-1;pointer-events:none;
  background:
    radial-gradient(circle at 12% 8%,rgba(233,69,96,0.10),transparent 45%),
    radial-gradient(circle at 88% 22%,rgba(15,52,96,0.10),transparent 45%),
    radial-gradient(circle at 50% 92%,rgba(255,107,129,0.08),transparent 50%);
}
body.dark-mode::before{
  background:
    radial-gradient(circle at 12% 8%,rgba(233,69,96,0.16),transparent 45%),
    radial-gradient(circle at 88% 22%,rgba(15,52,96,0.22),transparent 45%),
    radial-gradient(circle at 50% 92%,rgba(255,107,129,0.10),transparent 50%);
}
img,svg{max-width:100%;height:auto;display:block}
a{color:var(--accent);text-decoration:none;transition:color var(--transition),opacity var(--transition)}
a:hover{color:var(--accent-dark)}
button{font-family:inherit}
ul{list-style:none}
::selection{background:rgba(233,69,96,0.25);color:var(--text)}
.container{max-width:1200px;margin:0 auto;padding:0 20px;width:100%}
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-track{background:var(--bg)}
::-webkit-scrollbar-thumb{background:linear-gradient(180deg,var(--accent),var(--accent-dark));border-radius:10px;border:2px solid var(--bg)}
::-webkit-scrollbar-thumb:hover{background:var(--accent-dark)}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px}

/* ===== 吸顶导航 · 毛玻璃 ===== */
.sticky-nav{
  position:sticky;top:0;z-index:1000;
  background:var(--surface-glass);
  backdrop-filter:var(--glass-blur);-webkit-backdrop-filter:var(--glass-blur);
  border-bottom:1px solid var(--border-glass);
  transition:box-shadow var(--transition),background var(--transition),border-color var(--transition);
}
body.dark-mode .sticky-nav{background:rgba(15,15,26,0.72)}
.sticky-nav.scrolled{
  box-shadow:0 8px 32px rgba(26,26,46,0.10);
  border-bottom-color:var(--border);
}
body.dark-mode .sticky-nav.scrolled{box-shadow:0 8px 32px rgba(0,0,0,0.45)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:var(--nav-h);gap:16px}
.nav-logo{
  display:flex;align-items:center;gap:10px;font-weight:800;font-size:1.15rem;
  color:var(--text);white-space:nowrap;letter-spacing:-0.3px;
  transition:transform var(--transition);
}
.nav-logo:hover{transform:translateY(-1px)}
.nav-logo svg{width:34px;height:34px;flex-shrink:0;border-radius:10px;box-shadow:0 4px 14px rgba(233,69,96,0.35);transition:transform var(--transition)}
.nav-logo:hover svg{transform:rotate(-6deg) scale(1.05)}
.nav-links{display:flex;align-items:center;gap:2px;list-style:none;flex-wrap:wrap}
.nav-links a{
  position:relative;color:var(--text-secondary);font-size:0.9rem;font-weight:500;
  padding:8px 12px;border-radius:var(--radius-sm);
  transition:color var(--transition),background var(--transition);
  white-space:nowrap;
}
.nav-links a::after{
  content:'';position:absolute;left:50%;bottom:4px;width:0;height:2px;
  background:var(--accent-gradient);border-radius:2px;
  transform:translateX(-50%);transition:width var(--transition);
}
.nav-links a:hover{color:var(--accent);background:rgba(233,69,96,0.08)}
.nav-links a:hover::after{width:60%}
.nav-actions{display:flex;align-items:center;gap:8px}
.search-box{
  display:flex;align-items:center;background:var(--bg);
  border:1px solid var(--border);border-radius:var(--radius-pill);
  padding:0 6px 0 14px;transition:border-color var(--transition),box-shadow var(--transition),background var(--transition);
}
body.dark-mode .search-box{background:rgba(255,255,255,0.04)}
.search-box:focus-within{
  border-color:var(--accent);
  box-shadow:0 0 0 4px rgba(233,69,96,0.12);
}
.search-box input{
  border:none;background:transparent;padding:8px 6px;font-size:0.85rem;
  color:var(--text);outline:none;width:130px;transition:width var(--transition);
}
.search-box input::placeholder{color:var(--text-secondary);opacity:0.7}
.search-box input:focus{width:170px}
.search-box button{
  border:none;background:transparent;cursor:pointer;padding:6px;
  color:var(--text-secondary);display:flex;align-items:center;border-radius:50%;
  transition:color var(--transition),background var(--transition),transform var(--transition);
}
.search-box button:hover{color:#fff;background:var(--accent);transform:scale(1.08)}
.theme-toggle{
  background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-pill);
  cursor:pointer;padding:9px;color:var(--text-secondary);display:flex;align-items:center;
  transition:all var(--transition);
}
body.dark-mode .theme-toggle{background:rgba(255,255,255,0.04)}
.theme-toggle:hover{
  color:#fff;border-color:transparent;background:var(--accent-gradient);
  transform:rotate(-15deg) scale(1.06);box-shadow:0 6px 18px rgba(233,69,96,0.4);
}
.theme-toggle svg{transition:transform var(--transition)}
.mobile-menu-btn{
  display:none;background:var(--bg);border:1px solid var(--border);
  border-radius:var(--radius-pill);cursor:pointer;padding:9px;color:var(--text);
  align-items:center;transition:all var(--transition);
}
.mobile-menu-btn:hover{color:var(--accent);border-color:var(--accent)}

/* ===== 面包屑 ===== */
.breadcrumb{
  padding:18px 0 4px;font-size:0.82rem;color:var(--text-secondary);
  display:flex;align-items:center;gap:8px;flex-wrap:wrap;
}
.breadcrumb a{color:var(--text-secondary);position:relative}
.breadcrumb a::after{
  content:'';position:absolute;left:0;bottom:-2px;width:0;height:1px;
  background:var(--accent);transition:width var(--transition);
}
.breadcrumb a:hover{color:var(--accent)}
.breadcrumb a:hover::after{width:100%}
.breadcrumb .sep{color:var(--border)}

/* ===== Banner 轮播 · 渐变 ===== */
.hero{
  position:relative;overflow:hidden;color:#fff;
  background:var(--brand-gradient);
  min-height:520px;display:flex;align-items:center;
  margin-top:12px;
}
.hero::after{
  content:'';position:absolute;inset:0;z-index:1;pointer-events:none;
  background:
    radial-gradient(circle at 18% 20%,rgba(233,69,96,0.35),transparent 42%),
    radial-gradient(circle at 82% 78%,rgba(255,107,129,0.28),transparent 46%),
    linear-gradient(120deg,rgba(15,52,96,0.55) 0%,transparent 55%);
}
.hero-slides{position:relative;width:100%;height:100%;min-height:520px}
.hero-slide{
  position:absolute;inset:0;display:flex;align-items:center;opacity:0;
  transition:opacity 0.9s ease;pointer-events:none;
}
.hero-slide.active{opacity:1;pointer-events:auto}
.hero-slide .container{position:relative;z-index:3;width:100%}
.hero-content{max-width:740px;animation:heroIn 0.9s cubic-bezier(0.22,1,0.36,1) both}
.hero-slide.active .hero-content{animation:heroIn 0.9s cubic-bezier(0.22,1,0.36,1) both}
@keyframes heroIn{
  from{opacity:0;transform:translateY(28px)}
  to{opacity:1;transform:translateY(0)}
}
.hero-badge{
  display:inline-flex;align-items:center;gap:6px;
  background:rgba(233,69,96,0.22);
  border:1px solid rgba(255,107,129,0.55);
  color:#ffb3c0;padding:7px 16px;border-radius:var(--radius-pill);
  font-size:0.8rem;margin-bottom:22px;letter-spacing:0.6px;
  backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);
  box-shadow:0 4px 18px rgba(233,69,96,0.25);
}
.hero h1{
  font-size:clamp(1.8rem,4vw,2.9rem);line-height:1.28;margin-bottom:18px;
  font-weight:800;letter-spacing:-0.8px;text-shadow:0 2px 24px rgba(0,0,0,0.25);
}
.hero h1 .highlight{
  color:#ff6b81;position:relative;display:inline-block;
  background:linear-gradient(120deg,#ff6b81,#ffb3c0);
  -webkit-background-clip:text;background-clip:text;
  -webkit-text-fill-color:transparent;
}
.hero p{
  font-size:1.05rem;color:rgba(255,255,255,0.88);margin-bottom:30px;
  line-height:1.9;max-width:640px;
}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 28px;border-radius:var(--radius-pill);
  font-size:0.95rem;font-weight:600;cursor:pointer;border:none;
  transition:all var(--transition);text-decoration:none;white-space:nowrap;
  position:relative;overflow:hidden;
}
.btn svg{transition:transform var(--transition)}
.btn:hover svg{transform:translateX(4px)}
.btn-primary{
  background:var(--accent-gradient);color:#fff;
  box-shadow:0 6px 20px rgba(233,69,96,0.4);
}
.btn-primary::before{
  content:'';position:absolute;inset:0;
  background:linear-gradient(120deg,transparent,rgba(255,255,255,0.35),transparent);
  transform:translateX(-120%);transition:transform 0.6s ease;
}
.btn-primary:hover{
  color:#fff;transform:translateY(-3px);
  box-shadow:0 14px 34px rgba(233,69,96,0.5);
}
.btn-primary:hover::before{transform:translateX(120%)}
.btn-outline{
  background:rgba(255,255,255,0.06);color:#fff;
  border:1.5px solid rgba(255,255,255,0.42);
  backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);
}
.btn-outline:hover{
  border-color:#fff;background:rgba(255,255,255,0.16);
  color:#fff;transform:translateY(-3px);
  box-shadow:0 12px 30px rgba(0,0,0,0.25);
}
.hero-dots{
  position:absolute;bottom:26px;left:50%;transform:translateX(-50%);
  display:flex;gap:10px;z-index:10;
}
.hero-dot{
  width:10px;height:10px;border-radius:var(--radius-pill);
  background:rgba(255,255,255,0.35);border:none;cursor:pointer;
  transition:all var(--transition);padding:0;
}
.hero-dot:hover{background:rgba(255,255,255,0.6)}
.hero-dot.active{
  background:var(--accent-gradient);width:30px;
  box-shadow:0 0 14px rgba(233,69,96,0.7);
}
.hero-bg-decor{position:absolute;inset:0;opacity:0.14;pointer-events:none;z-index:1}
.hero-bg-decor svg{width:100%;height:100%}

/* ===== 数字统计条 ===== */
.stats-bar{
  background:var(--surface-glass);
  backdrop-filter:var(--glass-blur);-webkit-backdrop-filter:var(--glass-blur);
  border-bottom:1px solid var(--border);
  padding:32px 0;transition:background var(--transition);
  position:relative;z-index:5;
}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;text-align:center}
.stat-item{position:relative;padding:8px 0}
.stat-item::after{
  content:'';position:absolute;right:0;top:20%;height:60%;width:1px;
  background:var(--border);
}
.stat-item:last-child::after{display:none}
.stat-item .stat-num{
  font-size:2.1rem;font-weight:800;line-height:1.2;letter-spacing:-1px;
  background:var(--accent-gradient);
  -webkit-background-clip:text;background-clip:text;
  -webkit-text-fill-color:transparent;
}
.stat-item .stat-label{font-size:0.85rem;color:var(--text-secondary);margin-top:6px}

/* ===== 通用区块 ===== */
.section{padding:80px 0;position:relative}
.section-alt{
  background:var(--surface);
  transition:background var(--transition);
}
body.dark-mode .section-alt{background:rgba(255,255,255,0.02)}
.section-header{text-align:center;max-width:780px;margin:0 auto 52px}
.section-header h2{
  font-size:clamp(1.5rem,3vw,2.05rem);font-weight:800;
  margin-bottom:14px;letter-spacing:-0.5px;line-height:1.35;
}
.section-header p{color:var(--text-secondary);font-size:1rem;line-height:1.9}
.section-tag{
  display:inline-block;background:rgba(233,69,96,0.1);color:var(--accent);
  padding:6px 18px;border-radius:var(--radius-pill);
  font-size:0.8rem;font-weight:700;margin-bottom:16px;letter-spacing:0.8px;
  border:1px solid rgba(233,69,96,0.18);
}

/* ===== 卡片网格 ===== */
.card-grid{display:grid;gap:24px}
.card-grid-3{grid-template-columns:repeat(3,1fr)}
.card-grid-2{grid-template-columns:repeat(2,1fr)}
.card-grid-4{grid-template-columns:repeat(4,1fr)}
.card{
  position:relative;background:var(--surface);
  border:1px solid var(--border);border-radius:var(--radius);
  padding:30px;transition:all var(--transition);
  box-shadow:var(--card-shadow);display:flex;flex-direction:column;
  overflow:hidden;
}
.card::before{
  content:'';position:absolute;top:0;left:0;right:0;height:3px;
  background:var(--accent-gradient);transform:scaleX(0);
  transform-origin:left;transition:transform var(--transition);
}
.card:hover{
  transform:translateY(-6px);
  box-shadow:var(--card-shadow-hover);
  border-color:rgba(233,69,96,0.35);
}
.card:hover::before{transform:scaleX(1)}
.card-icon{
  width:52px;height:52px;border-radius:14px;
  display:flex;align-items:center;justify-content:center;
  margin-bottom:18px;flex-shrink:0;
  transition:transform var(--transition),box-shadow var(--transition);
}
.card:hover .card-icon{transform:scale(1.08) rotate(-4deg);box-shadow:0 8px 22px rgba(233,69,96,0.22)}
.card h3{font-size:1.1rem;font-weight:700;margin-bottom:10px;line-height:1.5}
.card p{font-size:0.9rem;color:var(--text-secondary);line-height:1.85;flex:1}
.card-link{
  margin-top:18px;font-size:0.85rem;font-weight:700;
  display:inline-flex;align-items:center;gap:4px;
  transition:gap var(--transition),color var(--transition);
}
.card-link:hover{gap:9px;color:var(--accent-dark)}

/* ===== 文章列表 ===== */
.article-list{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.article-card{
  position:relative;background:var(--surface);
  border:1px solid var(--border);border-radius:var(--radius);
  padding:26px;transition:all var(--transition);
  box-shadow:var(--card-shadow);display:flex;flex-direction:column;
  overflow:hidden;
}
.article-card::after{
  content:'';position:absolute;left:0;top:0;bottom:0;width:3px;
  background:var(--accent-gradient);transform:scaleY(0);
  transform-origin:top;transition:transform var(--transition);
}
.article-card:hover{
  transform:translateY(-5px);
  box-shadow:var(--card-shadow-hover);
  border-color:rgba(233,69,96,0.3);
}
.article-card:hover::after{transform:scaleY(1)}
.article-meta{
  display:flex;gap:12px;font-size:0.78rem;color:var(--text-secondary);
  margin-bottom:12px;flex-wrap:wrap;align-items:center;
}
.article-meta span:first-child{
  color:var(--accent);font-weight:600;
  padding:2px 10px;background:rgba(233,69,96,0.08);border-radius:var(--radius-pill);
}
.article-card h3{
  font-size:1.05rem;font-weight:700;margin-bottom:10px;line-height:1.55;
  transition:color var(--transition);
}
.article-card:hover h3{color:var(--accent)}
.article-card p{font-size:0.88rem;color:var(--text-secondary);line-height:1.8;flex:1}

/* ===== FAQ ===== */
.faq-list{max-width:880px;margin:0 auto;display:flex;flex-direction:column;gap:14px}
.faq-item{
  background:var(--surface);border:1px solid var(--border);
  border-radius:var(--radius);overflow:hidden;
  transition:border-color var(--transition),box-shadow var(--transition),transform var(--transition);
}
.faq-item:hover{border-color:rgba(233,69,96,0.35);transform:translateY(-2px);box-shadow:var(--card-shadow)}
.faq-item.open{
  border-color:var(--accent);
  box-shadow:0 10px 30px rgba(233,69,96,0.14);
}
.faq-question{
  width:100%;text-align:left;background:transparent;border:none;cursor:pointer;
  padding:20px 24px;font-size:0.98rem;font-weight:600;color:var(--text);
  display:flex;justify-content:space-between;align-items:center;gap:12px;
  font-family:inherit;line-height:1.6;transition:color var(--transition);
}
.faq-question:hover{color:var(--accent)}
.faq-arrow{
  flex-shrink:0;transition:transform var(--transition),color var(--transition);
  color:var(--accent);
  width:28px;height:28px;padding:5px;border-radius:50%;
  background:rgba(233,69,96,0.08);
}
.faq-item.open .faq-arrow{transform:rotate(180deg);background:var(--accent);color:#fff}
.faq-answer{
  max-height:0;overflow:hidden;
  transition:max-height 0.45s cubic-bezier(0.4,0,0.2,1),padding 0.35s ease;
  padding:0 24px;
}
.faq-item.open .faq-answer{max-height:640px;padding:0 24px 22px}
.faq-answer p{font-size:0.9rem;color:var(--text-secondary);line-height:1.9}

/* ===== HowTo 步骤 ===== */
.howto-steps{display:flex;flex-direction:column;gap:0;max-width:820px;margin:0 auto}
.howto-step{display:flex;gap:22px;position:relative;padding-bottom:34px}
.howto-step:last-child{padding-bottom:0}
.howto-step::before{
  content:'';position:absolute;left:20px;top:46px;bottom:0;width:2px;
  background:linear-gradient(180deg,var(--accent),var(--border));
}
.howto-step:last-child::before{display:none}
.howto-num{
  width:42px;height:42px;border-radius:50%;
  background:var(--accent-gradient);color:#fff;
  display:flex;align-items:center;justify-content:center;
  font-weight:700;font-size:0.9rem;flex-shrink:0;
  position:relative;z-index:1;
  box-shadow:0 6px 18px rgba(233,69,96,0.35);
  transition:transform var(--transition),box-shadow var(--transition);
}
.howto-step:hover .howto-num{transform:scale(1.12);box-shadow:0 10px 26px rgba(233,69,96,0.5)}
.howto-content h3{font-size:1rem;font-weight:700;margin-bottom:6px}
.howto-content p{font-size:0.88rem;color:var(--text-secondary);line-height:1.85}

/* ===== 客户评价 ===== */
.testimonial-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.testimonial{
  position:relative;background:var(--surface);
  border:1px solid var(--border);border-radius:var(--radius);
  padding:30px;box-shadow:var(--card-shadow);
  transition:all var(--transition);overflow:hidden;
}
.testimonial::before{
  content:'"';position:absolute;top:-10px;right:18px;
  font-size:6rem;line-height:1;font-weight:800;
  color:rgba(233,69,96,0.08);font-family:Georgia,serif;
  transition:color var(--transition);
}
.testimonial:hover{
  transform:translateY(-5px);
  box-shadow:var(--card-shadow-hover);
  border-color:rgba(233,69,96,0.3);
}
.testimonial:hover::before{color:rgba(233,69,96,0.16)}
.testimonial-stars{color:#f5a623;font-size:0.95rem;margin-bottom:14px;letter-spacing:3px}
.testimonial p{
  font-size:0.9rem;color:var(--text-secondary);line-height:1.85;
  font-style:italic;margin-bottom:18px;position:relative;z-index:1;
}
.testimonial-author{display:flex;align-items:center;gap:12px}
.testimonial-avatar{
  width:44px;height:44px;border-radius:50%;
  background:var(--brand-gradient);
  display:flex;align-items:center;justify-content:center;
  color:#fff;font-weight:700;font-size:0.88rem;
  box-shadow:0 4px 14px rgba(26,26,46,0.25);flex-shrink:0;
  transition:transform var(--transition);
}
.testimonial:hover .testimonial-avatar{transform:scale(1.08)}
.testimonial-name{font-size:0.88rem;font-weight:700}
.testimonial-role{font-size:0.78rem;color:var(--text-secondary)}

/* ===== 联系方式 ===== */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:start}
.contact-info-item{display:flex;gap:16px;margin-bottom:26px}
.contact-info-icon{
  width:48px;height:48px;border-radius:14px;
  background:rgba(233,69,96,0.1);color:var(--accent);
  display:flex;align-items:center;justify-content:center;flex-shrink:0;
  transition:all var(--transition);
}
.contact-info-item:hover .contact-info-icon{
  background:var(--accent-gradient);color:#fff;
  transform:translateY(-3px) scale(1.05);
  box-shadow:0 10px 24px rgba(233,69,96,0.35);
}
.contact-info-item h4{font-size:0.95rem;font-weight:700;margin-bottom:4px}
.contact-info-item p{font-size:0.88rem;color:var(--text-secondary);line-height:1.75}
.contact-form{
  background:var(--surface-glass);
  backdrop-filter:var(--glass-blur);-webkit-backdrop-filter:var(--glass-blur);
  border:1px solid var(--border-glass);border-radius:var(--radius);
  padding:34px;box-shadow:var(--card-shadow);
  transition:box-shadow var(--transition),border-color var(--transition);
}
.contact-form:hover{box-shadow:var(--card-shadow-hover);border-color:rgba(233,69,96,0.25)}
.form-group{margin-bottom:18px}
.form-group label{display:block;font-size:0.85rem;font-weight:600;margin-bottom:7px}
.form-group input,.form-group textarea{
  width:100%;padding:13px 16px;border:1px solid var(--border);
  border-radius:var(--radius-sm);font-family:inherit;font-size:0.9rem;
  background:var(--bg);color:var(--text);outline:none;
  transition:border-color var(--transition),box-shadow var(--transition),background var(--transition);
}
.form-group input:focus,.form-group textarea:focus{
  border-color:var(--accent);
  box-shadow:0 0 0 4px rgba(233,69,96,0.12);
}
.form-group input::placeholder,.form-group textarea::placeholder{color:var(--text-secondary);opacity:0.65}
.form-group textarea{resize:vertical;min-height:110px}

/* ===== 页脚 ===== */
.footer{
  position:relative;background:var(--brand-gradient);
  color:rgba(255,255,255,0.75);padding:64px 0 0;overflow:hidden;
}
.footer::before{
  content:'';position:absolute;inset:0;pointer-events:none;
  background:
    radial-gradient(circle at 10% 0%,rgba(233,69,96,0.22),transparent 40%),
    radial-gradient(circle at 90% 100%,rgba(15,52,96,0.5),transparent 45%);
}
.footer .container{position:relative;z-index:1}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:44px;padding-bottom:44px}
.footer-brand{
  display:flex;align-items:center;gap:10px;color:#fff;font-weight:800;
  font-size:1.12rem;margin-bottom:16px;letter-spacing:-0.3px;
}
.footer-brand svg{width:32px;height:32px;border-radius:10px;box-shadow:0 4px 16px rgba(233,69,96,0.4)}
.footer-desc{font-size:0.85rem;line-height:1.9;margin-bottom:14px;color:rgba(255,255,255,0.72)}
.footer h4{
  color:#fff;font-size:0.92rem;font-weight:700;margin-bottom:18px;
  position:relative;padding-bottom:10px;
}
.footer h4::after{
  content:'';position:absolute;left:0;bottom:0;width:26px;height:2px;
  background:var(--accent-gradient);border-radius:2px;
}
.footer-links{list-style:none;display:flex;flex-direction:column;gap:11px}
.footer-links a{
  color:rgba(255,255,255,0.7);font-size:0.85rem;
  transition:color var(--transition),padding-left var(--transition);
  display:inline-block;
}
.footer-links a:hover{color:#ff6b81;padding-left:5px}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,0.12);padding:22px 0;
  display:flex;justify-content:space-between;align-items:center;
  flex-wrap:wrap;gap:12px;font-size:0.8rem;
}
.footer-bottom a{color:rgba(255,255,255,0.6);transition:color var(--transition)}
.footer-bottom a:hover{color:#ff6b81}

/* ===== 返回顶部 ===== */
.back-to-top{
  position:fixed;bottom:30px;right:30px;width:48px;height:48px;
  border-radius:50%;background:var(--accent-gradient);color:#fff;
  border:none;cursor:pointer;display:flex;align-items:center;justify-content:center;
  box-shadow:0 8px 24px rgba(233,69,96,0.45);
  opacity:0;visibility:hidden;transform:translateY(16px) scale(0.85);
  transition:all var(--transition);z-index:999;
}
.back-to-top.visible{opacity:1;visibility:visible;transform:translateY(0) scale(1)}
.back-to-top:hover{
  transform:translateY(-4px) scale(1.06);
  box-shadow:0 14px 34px rgba(233,69,96,0.6);
}

/* ===== 滚动动画 ===== */
.reveal{
  opacity:0;transform:translateY(26px);
  transition:opacity 0.7s cubic-bezier(0.22,1,0.36,1),transform 0.7s cubic-bezier(0.22,1,0.36,1);
  will-change:opacity,transform;
}
.reveal.visible{opacity:1;transform:translateY(0)}
.card-grid .reveal:nth-child(2){transition-delay:0.06s}
.card-grid .reveal:nth-child(3){transition-delay:0.12s}
.card-grid .reveal:nth-child(4){transition-delay:0.18s}
.card-grid .reveal:nth-child(5){transition-delay:0.24s}
.card-grid .reveal:nth-child(6){transition-delay:0.3s}
.article-list .reveal:nth-child(2n){transition-delay:0.06s}
.testimonial-grid .reveal:nth-child(2){transition-delay:0.08s}
.testimonial-grid .reveal:nth-child(3){transition-delay:0.16s}
.howto-steps .reveal:nth-child(2){transition-delay:0.04s}
.howto-steps .reveal:nth-child(3){transition-delay:0.08s}
.howto-steps .reveal:nth-child(4){transition-delay:0.12s}
.howto-steps .reveal:nth-child(5){transition-delay:0.16s}
.howto-steps .reveal:nth-child(6){transition-delay:0.2s}
.howto-steps .reveal:nth-child(7){transition-delay:0.24s}
.howto-steps .reveal:nth-child(8){transition-delay:0.28s}
.howto-steps .reveal:nth-child(9){transition-delay:0.32s}

/* ===== 辅助 ===== */
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);border:0}
.text-center{text-align:center}
.mt-24{margin-top:24px}
.mt-32{margin-top:32px}
.mt-48{margin-top:48px}

/* ===== 响应式 · 平板 ===== */
@media(max-width:968px){
  :root{--nav-h:60px}
  .nav-links{display:none}
  .mobile-menu-btn{display:flex}
  .nav-links.mobile-open{
    display:flex;flex-direction:column;position:absolute;top:var(--nav-h);left:0;right:0;
    background:var(--surface-glass);
    backdrop-filter:var(--glass-blur);-webkit-backdrop-filter:var(--glass-blur);
    border-bottom:1px solid var(--border);padding:16px;gap:4px;
    box-shadow:0 16px 32px rgba(0,0,0,0.12);
    animation:menuIn 0.3s ease both;
  }
  @keyframes menuIn{from{opacity:0;transform:translateY(-10px)}to{opacity:1;transform:translateY(0)}}
  .nav-links.mobile-open a{width:100%;padding:12px 16px;border-radius:var(--radius-sm)}
  .card-grid-3,.card-grid-4{grid-template-columns:repeat(2,1fr)}
  .testimonial-grid{grid-template-columns:1fr}
  .contact-grid{grid-template-columns:1fr;gap:36px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:36px}
  .article-list{grid-template-columns:1fr}
  .stats-grid{grid-template-columns:repeat(2,1fr);gap:24px}
  .stat-item:nth-child(2)::after{display:none}
  .search-box input{width:90px}
  .search-box input:focus{width:120px}
  .hero{min-height:480px}
  .hero-slides{min-height:480px}
  .section{padding:64px 0}
}

/* ===== 响应式 · 手机 ===== */
@media(max-width:600px){
  body{font-size:15px}
  .container{padding:0 16px}
  .card-grid-3,.card-grid-4,.card-grid-2{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr;gap:32px}
  .hero{min-height:440px;margin-top:0}
  .hero-slides{min-height:440px}
  .hero h1{font-size:1.65rem;letter-spacing:-0.4px}
  .hero p{font-size:0.95rem}
  .hero-actions{gap:10px}
  .btn{padding:11px 22px;font-size:0.9rem}
  .section{padding:52px 0}
  .section-header{margin-bottom:38px}
  .search-box{display:none}
  .stats-grid{grid-template-columns:repeat(2,1fr);gap:18px}
  .stat-item .stat-num{font-size:1.7rem}
  .stat-item::after{display:none}
  .card{padding:24px}
  .article-card{padding:22px}
  .contact-form{padding:24px}
  .faq-question{padding:16px 18px;font-size:0.92rem}
  .faq-item.open .faq-answer{padding:0 18px 18px}
  .faq-answer{padding:0 18px}
  .howto-step{gap:16px}
  .howto-step::before{left:19px}
  .back-to-top{bottom:20px;right:20px;width:44px;height:44px}
  .footer{padding:48px 0 0}
  .footer-bottom{flex-direction:column;text-align:center;justify-content:center}
}

/* ===== 减少动效偏好 ===== */
@media(prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:0.01ms !important;
    animation-iteration-count:1 !important;
    transition-duration:0.01ms !important;
    scroll-behavior:auto !important;
  }
  .reveal{opacity:1;transform:none}
}

/* ===== 打印样式 ===== */
@media print{
  .sticky-nav,.back-to-top,.hero-dots,.mobile-menu-btn,.theme-toggle,.search-box{display:none !important}
  body{background:#fff;color:#000}
  .hero{background:#fff;color:#000;min-height:auto}
  .card,.article-card,.testimonial,.faq-item{box-shadow:none;border:1px solid #ccc}
}