:root{
  --brand:#1a1a2e;
  --brand-soft:#2d2d4a;
  --accent:#e94560;
  --accent-2:#8e2de2;
  --accent-3:#0f3460;
  --bg:#f7f7fb;
  --bg-alt:#ffffff;
  --text:#1f2430;
  --muted:#5b6472;
  --card:rgba(255,255,255,.78);
  --card-solid:#ffffff;
  --line:rgba(26,26,46,.1);
  --glass:rgba(255,255,255,.55);
  --glass-border:rgba(255,255,255,.6);
  --shadow-sm:0 2px 8px rgba(26,26,46,.06);
  --shadow-md:0 10px 30px rgba(26,26,46,.1);
  --shadow-lg:0 18px 48px rgba(26,26,46,.16);
  --radius-sm:10px;
  --radius:16px;
  --radius-lg:24px;
  --ease:cubic-bezier(.22,.61,.36,1);
  --header-h:64px;
}

*{box-sizing:border-box;margin:0;padding:0;}

html{
  scroll-behavior:smooth;
  -webkit-text-size-adjust:100%;
  scroll-padding-top:calc(var(--header-h) + 16px);
}

body{
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  color:var(--text);
  background:
    radial-gradient(1200px 600px at 10% -10%,rgba(233,69,96,.1),transparent 60%),
    radial-gradient(1000px 520px at 100% 0%,rgba(142,45,226,.1),transparent 55%),
    var(--bg);
  background-attachment:fixed;
  line-height:1.75;
  font-size:16px;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
  transition:background-color .4s var(--ease),color .4s var(--ease);
}

a{
  color:var(--accent);
  text-decoration:none;
  transition:color .25s var(--ease),opacity .25s var(--ease);
}
a:hover{color:#c92f4a;text-decoration:underline;text-underline-offset:3px;}

img,svg{max-width:100%;display:block;}

h1,h2,h3,h4{line-height:1.35;font-weight:700;letter-spacing:-.01em;}
p{overflow-wrap:break-word;}

::selection{background:rgba(233,69,96,.22);color:var(--brand);}

.container{
  max-width:1160px;
  margin:0 auto;
  padding:0 20px;
  width:100%;
}

/* ============ 顶部导航（毛玻璃 + 渐变） ============ */
header.site-header{
  position:sticky;
  top:0;
  z-index:100;
  background:linear-gradient(120deg,rgba(26,26,46,.92) 0%,rgba(45,45,74,.9) 55%,rgba(15,52,96,.92) 100%);
  -webkit-backdrop-filter:blur(18px) saturate(160%);
  backdrop-filter:blur(18px) saturate(160%);
  color:#fff;
  border-bottom:1px solid rgba(255,255,255,.08);
  box-shadow:0 6px 24px rgba(0,0,0,.18);
}

.header-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:12px 20px;
  max-width:1160px;
  margin:0 auto;
  gap:16px;
  flex-wrap:wrap;
}

.logo{
  display:flex;
  align-items:center;
  gap:10px;
  color:#fff;
  font-weight:800;
  font-size:20px;
  letter-spacing:.02em;
  transition:transform .3s var(--ease);
}
.logo:hover{text-decoration:none;transform:translateY(-1px);}
.logo svg{
  width:40px;
  height:40px;
  filter:drop-shadow(0 4px 10px rgba(233,69,96,.4));
  transition:transform .5s var(--ease);
}
.logo:hover svg{transform:rotate(-8deg) scale(1.05);}

nav.main-nav ul{
  display:flex;
  gap:6px;
  list-style:none;
  flex-wrap:wrap;
  align-items:center;
}
nav.main-nav a{
  color:#dfe2ec;
  font-size:14.5px;
  padding:7px 12px;
  border-radius:999px;
  display:inline-block;
  transition:background .25s var(--ease),color .25s var(--ease),transform .25s var(--ease);
}
nav.main-nav a:hover{
  color:#fff;
  background:rgba(255,255,255,.12);
  text-decoration:none;
  transform:translateY(-1px);
}

.header-tools{
  display:flex;
  align-items:center;
  gap:10px;
}

.search-box{
  display:flex;
  align-items:center;
  background:rgba(255,255,255,.92);
  border:1px solid rgba(255,255,255,.5);
  border-radius:999px;
  overflow:hidden;
  transition:box-shadow .3s var(--ease),transform .3s var(--ease);
}
.search-box:focus-within{
  box-shadow:0 0 0 3px rgba(233,69,96,.35);
  transform:translateY(-1px);
}
.search-box input{
  border:0;
  padding:8px 14px;
  font-size:14px;
  outline:none;
  width:160px;
  background:transparent;
  color:var(--brand);
  font-family:inherit;
}
.search-box input::placeholder{color:#8a93a3;}
.search-box button{
  border:0;
  background:linear-gradient(135deg,var(--accent) 0%,#c92f4a 100%);
  color:#fff;
  padding:9px 16px;
  cursor:pointer;
  font-size:14px;
  font-family:inherit;
  font-weight:600;
  transition:filter .25s var(--ease),opacity .25s var(--ease);
}
.search-box button:hover{filter:brightness(1.08);}

.btn-toggle,.menu-toggle{
  border:1px solid rgba(255,255,255,.28);
  background:rgba(255,255,255,.08);
  color:#fff;
  border-radius:999px;
  padding:7px 14px;
  cursor:pointer;
  font-size:13px;
  font-family:inherit;
  -webkit-backdrop-filter:blur(6px);
  backdrop-filter:blur(6px);
  transition:background .25s var(--ease),border-color .25s var(--ease),transform .25s var(--ease);
}
.btn-toggle:hover,.menu-toggle:hover{
  background:rgba(255,255,255,.18);
  border-color:rgba(255,255,255,.5);
  transform:translateY(-1px);
}
.menu-toggle{display:none;border-radius:10px;padding:7px 12px;}

/* ============ 面包屑 ============ */
.breadcrumb{
  font-size:13px;
  color:#8a93a3;
  padding:16px 20px 6px;
}
.breadcrumb a{color:#5b6472;}
.breadcrumb a:hover{color:var(--accent);}
.breadcrumb span{color:var(--accent);font-weight:600;}

/* ============ Hero 渐变 Banner ============ */
.hero{
  position:relative;
  overflow:hidden;
  background:
    radial-gradient(900px 420px at 88% 8%,rgba(233,69,96,.45),transparent 62%),
    radial-gradient(760px 400px at 6% 92%,rgba(142,45,226,.4),transparent 60%),
    linear-gradient(135deg,#1a1a2e 0%,#2d2d4a 52%,#0f3460 100%);
  color:#fff;
  padding:64px 0 56px;
  isolation:isolate;
}
.hero::before{
  content:"";
  position:absolute;
  inset:-30% -10% auto -10%;
  height:120%;
  background:
    radial-gradient(closest-side,rgba(255,255,255,.09),transparent 70%) 20% 30%/520px 520px no-repeat,
    radial-gradient(closest-side,rgba(255,255,255,.06),transparent 70%) 80% 70%/460px 460px no-repeat;
  z-index:-1;
  animation:floatGlow 16s ease-in-out infinite alternate;
}
@keyframes floatGlow{
  from{transform:translate3d(0,0,0) scale(1);}
  to{transform:translate3d(-24px,18px,0) scale(1.06);}
}
.hero h1{
  font-size:clamp(26px,4.4vw,40px);
  line-height:1.25;
  margin-bottom:18px;
  background:linear-gradient(100deg,#ffffff 0%,#ffd6de 45%,#e6d6ff 100%);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
  letter-spacing:-.02em;
}
.hero p{
  font-size:clamp(15px,1.6vw,17px);
  color:#d3d6e0;
  max-width:820px;
  margin-bottom:14px;
}
.hero .cta{
  display:inline-block;
  background:linear-gradient(135deg,var(--accent) 0%,#b02a8f 100%);
  color:#fff;
  padding:13px 30px;
  border-radius:999px;
  font-weight:700;
  margin-top:14px;
  box-shadow:0 10px 26px rgba(233,69,96,.38);
  transition:transform .3s var(--ease),box-shadow .3s var(--ease),filter .3s var(--ease);
  position:relative;
  overflow:hidden;
}
.hero .cta::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(120deg,transparent 30%,rgba(255,255,255,.35) 50%,transparent 70%);
  transform:translateX(-120%);
  transition:transform .7s var(--ease);
}
.hero .cta:hover{
  text-decoration:none;
  transform:translateY(-3px);
  box-shadow:0 16px 36px rgba(233,69,96,.5);
  filter:brightness(1.05);
}
.hero .cta:hover::after{transform:translateX(120%);}

/* ============ 轮播 ============ */
.banner-carousel{
  position:relative;
  overflow:hidden;
  border-radius:var(--radius-lg);
  margin-top:34px;
  background:rgba(255,255,255,.06);
  border:1px solid rgba(255,255,255,.14);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  box-shadow:0 20px 50px rgba(0,0,0,.28);
}
.carousel-track{
  display:flex;
  transition:transform .6s var(--ease);
  will-change:transform;
}
.carousel-slide{
  min-width:100%;
  padding:44px 34px;
  color:#fff;
  position:relative;
}
.carousel-slide:nth-child(1){background:linear-gradient(120deg,#e94560 0%,#8e2de2 100%);}
.carousel-slide:nth-child(2){background:linear-gradient(120deg,#0f3460 0%,#16213e 100%);}
.carousel-slide:nth-child(3){background:linear-gradient(120deg,#11998e 0%,#38ef7d 100%);}
.carousel-slide h2{
  font-size:clamp(19px,2.6vw,25px);
  margin-bottom:10px;
  text-shadow:0 2px 12px rgba(0,0,0,.18);
}
.carousel-slide p{
  color:rgba(255,255,255,.9);
  font-size:15px;
  max-width:640px;
}
.carousel-dots{
  display:flex;
  justify-content:center;
  gap:8px;
  padding:14px 0;
  background:rgba(15,15,30,.55);
}
.carousel-dots button{
  width:10px;
  height:10px;
  border-radius:50%;
  border:0;
  background:rgba(255,255,255,.35);
  cursor:pointer;
  padding:0;
  transition:width .3s var(--ease),background .3s var(--ease),transform .3s var(--ease);
}
.carousel-dots button:hover{background:rgba(255,255,255,.65);transform:scale(1.15);}
.carousel-dots button.active{
  width:26px;
  border-radius:999px;
  background:linear-gradient(90deg,var(--accent),#ff7a93);
}

/* ============ 区块 ============ */
section{
  padding:56px 0;
  position:relative;
}
section:nth-child(even){
  background:linear-gradient(180deg,rgba(255,255,255,.55) 0%,rgba(255,255,255,.85) 100%);
  -webkit-backdrop-filter:blur(2px);
  backdrop-filter:blur(2px);
}

.section-title{
  font-size:clamp(21px,2.6vw,27px);
  margin-bottom:10px;
  color:var(--brand);
  position:relative;
  padding-left:16px;
}
.section-title::before{
  content:"";
  position:absolute;
  left:0;
  top:.18em;
  bottom:.18em;
  width:5px;
  border-radius:999px;
  background:linear-gradient(180deg,var(--accent),var(--accent-2));
  box-shadow:0 0 14px rgba(233,69,96,.45);
}
.section-sub{
  color:var(--muted);
  margin-bottom:30px;
  font-size:15px;
  max-width:860px;
}

/* ============ 栅格 ============ */
.grid{display:grid;gap:22px;}
.grid-3{grid-template-columns:repeat(3,minmax(0,1fr));}
.grid-2{grid-template-columns:repeat(2,minmax(0,1fr));}

/* ============ 圆角卡片（毛玻璃） ============ */
.card{
  background:var(--card);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  backdrop-filter:blur(14px) saturate(140%);
  border:1px solid var(--glass-border);
  border-radius:var(--radius);
  padding:24px;
  box-shadow:var(--shadow-sm);
  position:relative;
  overflow:hidden;
  transition:transform .35s var(--ease),box-shadow .35s var(--ease),border-color .35s var(--ease),background .35s var(--ease);
}
.card::before{
  content:"";
  position:absolute;
  inset:0 0 auto 0;
  height:3px;
  background:linear-gradient(90deg,var(--accent),var(--accent-2),#38ef7d);
  opacity:0;
  transition:opacity .35s var(--ease);
}
.card:hover{
  transform:translateY(-6px);
  box-shadow:var(--shadow-lg);
  border-color:rgba(233,69,96,.28);
}
.card:hover::before{opacity:1;}

.card h3{
  font-size:18px;
  margin-bottom:10px;
  color:var(--brand);
}
.card h4{
  font-size:15px;
  margin:14px 0 6px;
  color:#2f3542;
}
.card p{
  color:var(--muted);
  font-size:15px;
}
.card p + p{margin-top:10px;}

/* ============ 统计数字 ============ */
.stat-num{
  font-size:clamp(30px,4vw,38px);
  font-weight:800;
  line-height:1.15;
  background:linear-gradient(120deg,var(--accent),var(--accent-2));
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
  letter-spacing:-.02em;
  margin-bottom:6px;
}
.stat-label{
  color:var(--muted);
  font-size:14px;
}

/* ============ 文章列表 ============ */
.article-list .article-item{
  border-bottom:1px solid var(--line);
  padding:22px 4px;
  transition:padding-left .3s var(--ease),background .3s var(--ease);
  border-radius:var(--radius-sm);
}
.article-list .article-item:last-child{border-bottom:0;}
.article-list .article-item:hover{
  padding-left:16px;
  background:linear-gradient(90deg,rgba(233,69,96,.06),transparent 70%);
}
.article-meta{
  font-size:13px;
  color:#8a93a3;
  margin-bottom:6px;
  letter-spacing:.01em;
}
.article-item h3{
  font-size:18px;
  margin-bottom:8px;
}
.article-item h3 a{color:var(--brand);}
.article-item h3 a:hover{color:var(--accent);text-decoration:none;}
.article-item p{
  color:var(--muted);
  font-size:15px;
  margin-bottom:10px;
}
.article-item > a{
  font-size:14px;
  font-weight:600;
  display:inline-flex;
  align-items:center;
  gap:4px;
}
.article-item > a::after{
  content:"→";
  transition:transform .3s var(--ease);
}
.article-item > a:hover{text-decoration:none;}
.article-item > a:hover::after{transform:translateX(4px);}

/* ============ FAQ 手风琴 ============ */
.faq-item{
  border:1px solid var(--line);
  border-radius:var(--radius-sm);
  margin-bottom:12px;
  overflow:hidden;
  background:var(--card);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
  transition:box-shadow .3s var(--ease),border-color .3s var(--ease),transform .3s var(--ease);
}
.faq-item:hover{
  border-color:rgba(233,69,96,.3);
  box-shadow:var(--shadow-sm);
}
.faq-item.open{
  border-color:rgba(233,69,96,.4);
  box-shadow:var(--shadow-md);
}
.faq-question{
  width:100%;
  text-align:left;
  background:transparent;
  border:0;
  padding:16px 20px;
  font-size:16px;
  font-weight:600;
  cursor:pointer;
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:12px;
  color:var(--brand);
  font-family:inherit;
  transition:color .25s var(--ease),background .25s var(--ease);
}
.faq-question:hover{color:var(--accent);}
.faq-question span{
  flex:0 0 auto;
  width:26px;
  height:26px;
  border-radius:50%;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  font-size:17px;
  line-height:1;
  background:rgba(233,69,96,.1);
  color:var(--accent);
  transition:transform .35s var(--ease),background .35s var(--ease);
}
.faq-item.open .faq-question span{
  background:linear-gradient(135deg,var(--accent),var(--accent-2));
  color:#fff;
  transform:rotate(180deg);
}
.faq-answer{
  padding:0 20px 16px;
  color:var(--muted);
  font-size:15px;
  display:none;
  animation:fadeSlide .35s var(--ease);
}
.faq-item.open .faq-answer{display:block;}
@keyframes fadeSlide{
  from{opacity:0;transform:translateY(-6px);}
  to{opacity:1;transform:none;}
}

/* ============ HowTo 步骤 ============ */
.howto-step{
  display:flex;
  gap:16px;
  margin-bottom:18px;
  align-items:flex-start;
}
.howto-step .step-num{
  flex:0 0 40px;
  height:40px;
  border-radius:50%;
  background:linear-gradient(135deg,var(--accent),var(--accent-2));
  color:#fff;
  display:flex;
  align-items:center;
  justify-content:center;
  font-weight:700;
  box-shadow:0 6px 16px rgba(233,69,96,.35);
  transition:transform .3s var(--ease);
}
.howto-step:hover .step-num{transform:scale(1.08) rotate(-6deg);}
.howto-step h4{margin-top:0;}

/* ============ 信息表格 ============ */
.info-table{
  width:100%;
  border-collapse:collapse;
  font-size:15px;
  border-radius:var(--radius-sm);
  overflow:hidden;
}
.info-table th,.info-table td{
  border:1px solid var(--line);
  padding:11px 14px;
  text-align:left;
  vertical-align:top;
}
.info-table th{
  background:linear-gradient(180deg,rgba(240,242,248,.9),rgba(232,235,244,.9));
  color:var(--brand);
  width:160px;
  font-weight:600;
}
.info-table tr{transition:background .25s var(--ease);}
.info-table tbody tr:hover,.info-table tr:hover{background:rgba(233,69,96,.05);}

/* ============ 高亮框 ============ */
.highlight-box{
  background:linear-gradient(120deg,rgba(255,246,247,.95),rgba(253,238,241,.75));
  border-left:4px solid var(--accent);
  padding:18px 22px;
  border-radius:var(--radius-sm);
  margin:22px 0;
  -webkit-backdrop-filter:blur(8px);
  backdrop-filter:blur(8px);
  box-shadow:var(--shadow-sm);
}
.highlight-box h4{margin-top:0;color:var(--brand);}
.highlight-box p{color:var(--muted);font-size:15px;}

/* ============ 标签 ============ */
.tag{
  display:inline-block;
  background:rgba(233,69,96,.1);
  color:var(--accent);
  border-radius:999px;
  padding:3px 12px;
  font-size:12px;
  margin-right:6px;
  transition:background .25s var(--ease),transform .25s var(--ease);
}
.tag:hover{background:rgba(233,69,96,.18);transform:translateY(-1px);}

/* ============ 页脚 ============ */
footer.site-footer{
  background:
    radial-gradient(800px 300px at 90% 0%,rgba(142,45,226,.28),transparent 60%),
    linear-gradient(160deg,#1a1a2e 0%,#22223c 60%,#0f3460 100%);
  color:#c5c9d6;
  padding:48px 0 22px;
  font-size:14px;
  position:relative;
}
footer.site-footer::before{
  content:"";
  position:absolute;
  inset:0 0 auto 0;
  height:2px;
  background:linear-gradient(90deg,transparent,var(--accent),var(--accent-2),transparent);
}
footer.site-footer a{color:#e6e8ef;}
footer.site-footer a:hover{color:#fff;}
.footer-grid{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:26px;
  margin-bottom:28px;
}
.footer-grid h4{
  color:#fff;
  margin-bottom:12px;
  font-size:15px;
  position:relative;
  padding-bottom:8px;
}
.footer-grid h4::after{
  content:"";
  position:absolute;
  left:0;
  bottom:0;
  width:28px;
  height:2px;
  border-radius:999px;
  background:linear-gradient(90deg,var(--accent),var(--accent-2));
}
.footer-grid ul{list-style:none;}
.footer-grid li{
  margin-bottom:8px;
  transition:transform .25s var(--ease);
}
.footer-grid li:hover{transform:translateX(4px);}
.footer-grid p{color:#aeb4c4;line-height:1.7;}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.1);
  padding-top:18px;
  text-align:center;
  color:#8a93a3;
  font-size:13px;
}

/* ============ 返回顶部 ============ */
.back-top{
  position:fixed;
  right:24px;
  bottom:24px;
  width:48px;
  height:48px;
  border-radius:50%;
  background:linear-gradient(135deg,var(--accent),var(--accent-2));
  color:#fff;
  border:0;
  cursor:pointer;
  font-size:20px;
  display:none;
  z-index:200;
  box-shadow:0 8px 24px rgba(233,69,96,.45);
  transition:transform .3s var(--ease),box-shadow .3s var(--ease),filter .3s var(--ease);
}
.back-top:hover{
  transform:translateY(-4px) scale(1.05);
  box-shadow:0 14px 32px rgba(233,69,96,.6);
  filter:brightness(1.08);
}

/* ============ 滚动动画 ============ */
.reveal{
  opacity:0;
  transform:translateY(26px);
  transition:opacity .7s var(--ease),transform .7s var(--ease);
  will-change:opacity,transform;
}
.reveal.visible{
  opacity:1;
  transform:none;
}

/* ============ 暗色模式 ============ */
.dark-mode{
  --bg:#0e0f16;
  --bg-alt:#151722;
  --text:#e6e8ef;
  --muted:#9aa3b2;
  --card:rgba(28,30,40,.72);
  --card-solid:#1c1e28;
  --line:rgba(255,255,255,.1);
  --glass:rgba(28,30,40,.6);
  --glass-border:rgba(255,255,255,.1);
  --brand:#e6e8ef;
  --shadow-sm:0 2px 8px rgba(0,0,0,.35);
  --shadow-md:0 10px 30px rgba(0,0,0,.45);
  --shadow-lg:0 18px 48px rgba(0,0,0,.55);
}
.dark-mode body{
  background:
    radial-gradient(1200px 600px at 10% -10%,rgba(233,69,96,.14),transparent 60%),
    radial-gradient(1000px 520px at 100% 0%,rgba(142,45,226,.16),transparent 55%),
    var(--bg);
}
.dark-mode section:nth-child(even){
  background:linear-gradient(180deg,rgba(21,23,34,.6) 0%,rgba(21,23,34,.9) 100%);
}
.dark-mode .card,
.dark-mode .faq-item{
  background:var(--card);
  border-color:var(--glass-border);
}
.dark-mode .faq-question{
  background:transparent;
  color:var(--text);
}
.dark-mode .faq-question:hover{color:var(--accent);}
.dark-mode .card h3,
.dark-mode .section-title,
.dark-mode .article-item h3 a{color:#e6e8ef;}
.dark-mode .card h4{color:#cfd4e0;}
.dark-mode .article-item:hover{
  background:linear-gradient(90deg,rgba(233,69,96,.12),transparent 70%);
}
.dark-mode .info-table th{
  background:linear-gradient(180deg,#232633,#1e2130);
  color:#e6e8ef;
}
.dark-mode .info-table td{color:#c5c9d6;}
.dark-mode .info-table th,
.dark-mode .info-table td{border-color:rgba(255,255,255,.1);}
.dark-mode .info-table tr:hover{background:rgba(233,69,96,.1);}
.dark-mode .highlight-box{
  background:linear-gradient(120deg,rgba(58,26,36,.85),rgba(40,22,30,.7));
}
.dark-mode .highlight-box h4{color:#e6e8ef;}
.dark-mode .search-box{background:rgba(255,255,255,.1);border-color:rgba(255,255,255,.15);}
.dark-mode .search-box input{color:#e6e8ef;}
.dark-mode .search-box input::placeholder{color:#8a93a3;}
.dark-mode .breadcrumb{color:#8a93a3;}
.dark-mode .breadcrumb a{color:#9aa3b2;}
.dark-mode a{color:#ff6b84;}
.dark-mode a:hover{color:#ff8fa3;}
.dark-mode .hero h1{
  background:linear-gradient(100deg,#ffffff 0%,#ffd6de 45%,#d9c2ff 100%);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}

/* ============ 响应式 ============ */
@media (max-width:1024px){
  .grid-3{grid-template-columns:repeat(2,minmax(0,1fr));}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .search-box input{width:130px;}
}

@media (max-width:900px){
  :root{--header-h:60px;}
  .grid-3,.grid-2{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr 1fr;}
  .hero{padding:48px 0 42px;}
  .hero h1{font-size:26px;}
  nav.main-nav{
    display:none;
    width:100%;
    order:3;
  }
  nav.main-nav.open{display:block;animation:fadeSlide .3s var(--ease);}
  nav.main-nav ul{
    flex-direction:column;
    gap:6px;
    padding-top:10px;
    width:100%;
  }
  nav.main-nav a{display:block;padding:10px 14px;}
  .menu-toggle{display:inline-block;}
  .search-box input{width:110px;}
  .header-inner{padding:10px 16px;}
  section{padding:44px 0;}
  .carousel-slide{padding:32px 22px;}
}

@media (max-width:640px){
  body{font-size:15px;}
  .container{padding:0 16px;}
  .header-inner{gap:10px;}
  .logo{font-size:18px;}
  .logo svg{width:34px;height:34px;}
  .header-tools{width:100%;justify-content:flex-end;}
  .search-box{flex:1;}
  .search-box input{width:100%;min-width:0;}
  .btn-toggle,.menu-toggle{white-space:nowrap;}
  .hero h1{font-size:23px;}
  .hero .cta{padding:11px 24px;font-size:15px;}
  .banner-carousel{border-radius:var(--radius);margin-top:24px;}
  .carousel-slide{padding:26px 18px;}
  .carousel-slide h2{font-size:18px;}
  .carousel-slide p{font-size:14px;}
  .card{padding:18px;border-radius:var(--radius-sm);}
  .section-title{font-size:20px;padding-left:14px;}
  .section-title::before{width:4px;}
  .faq-question{font-size:15px;padding:14px 16px;}
  .faq-answer{padding:0 16px 14px;font-size:14px;}
  .info-table th{width:110px;padding:9px 10px;}
  .info-table th,.info-table td{font-size:14px;padding:9px 10px;}
  .howto-step{gap:12px;}
  .howto-step .step-num{flex:0 0 34px;height:34px;font-size:14px;}
  .footer-grid{grid-template-columns:1fr;gap:20px;}
  .back-top{right:16px;bottom:16px;width:44px;height:44px;}
  .article-item h3{font-size:16px;}
}

@media (max-width:380px){
  .hero h1{font-size:21px;}
  .search-box button{padding:8px 12px;font-size:13px;}
  .btn-toggle{padding:6px 10px;font-size:12px;}
}

/* ============ 动效降级 ============ */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  .reveal{opacity:1;transform:none;}
}

/* ============ 打印 ============ */
@media print{
  header.site-header,.back-top,.banner-carousel,.hero .cta,.search-box,.btn-toggle,.menu-toggle{display:none !important;}
  body{background:#fff;color:#000;}
  .card,.faq-item{box-shadow:none;border:1px solid #ccc;background:#fff;}
  .faq-answer{display:block !important;}
  a{color:#000;text-decoration:underline;}
}