:root{
  --mint:#2FC7AE;
  --mint-deep:#12A98F;
  --mint-dark:#0B8471;
  --mint-soft:#E3F9F4;
  --mint-mist:#F1FCFA;
  --sky:#57B9E8;
  --sky-deep:#2E97CB;
  --sky-soft:#E4F4FC;
  --ink:#123A35;
  --ink-2:#3E6660;
  --ink-3:#7C9C96;
  --line:#DDF1EC;
  --line-strong:#C8E9E2;
  --bg:#F6FCFB;
  --white:#FFFFFF;
  --r-xl:32px;
  --r-lg:26px;
  --r-md:20px;
  --r-sm:14px;
  --r-pill:999px;
  --sd-xs:0 2px 8px rgba(17,140,120,.05);
  --sd-sm:0 8px 22px -10px rgba(17,140,120,.16);
  --sd-md:0 18px 40px -20px rgba(17,140,120,.26);
  --sd-lg:0 34px 70px -34px rgba(17,140,120,.34);
  --ease:cubic-bezier(.22,.78,.36,1);
}

*{box-sizing:border-box;}

html{
  scroll-behavior:smooth;
  -webkit-text-size-adjust:100%;
}

body{
  margin:0;
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.78;
  color:var(--ink);
  background:var(--bg);
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

img{max-width:100%;display:block;border:0;}
a{color:inherit;text-decoration:none;}
ul,ol{list-style:none;}
h1,h2,h3,h4,h5,p{margin:0;}
button{font-family:inherit;}

::selection{
  background:var(--mint);
  color:#fff;
}

/* ============ 布局基础 ============ */
.container{
  width:100%;
  max-width:1180px;
  margin:0 auto;
  padding:0 24px;
}

.section{
  position:relative;
  padding:96px 0;
}

.section-label{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:7px 18px;
  border-radius:var(--r-pill);
  background:var(--mint-soft);
  color:var(--mint-dark);
  font-size:.8rem;
  font-weight:700;
  letter-spacing:.12em;
  border:1px solid rgba(47,199,174,.22);
  margin-bottom:18px;
}

.section-label::before{
  content:"";
  width:7px;
  height:7px;
  border-radius:50%;
  background:var(--mint);
  box-shadow:0 0 0 4px rgba(47,199,174,.18);
}

.section-title{
  font-size:clamp(1.65rem,3.1vw,2.45rem);
  font-weight:800;
  line-height:1.35;
  letter-spacing:-.02em;
  color:var(--ink);
  margin-bottom:16px;
}

.section-desc{
  font-size:1rem;
  color:var(--ink-2);
  max-width:640px;
  line-height:1.9;
}

.text-accent{
  color:var(--mint-deep);
}

.text-center{
  text-align:center;
}

.text-center.section-desc{
  margin-left:auto;
  margin-right:auto;
}

.seo-description{
  font-size:.86rem;
  line-height:2;
  color:var(--ink-3);
  max-width:900px;
}

.mt-0{margin-top:0 !important;}
.mb-0{margin-bottom:0 !important;}

/* ============ 导航 ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:120;
  background:rgba(255,255,255,.86);
  -webkit-backdrop-filter:saturate(180%) blur(16px);
  backdrop-filter:saturate(180%) blur(16px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .3s var(--ease);
}

.site-header:hover{
  box-shadow:0 10px 30px -22px rgba(17,140,120,.45);
}

.header-inner{
  width:100%;
  max-width:1180px;
  margin:0 auto;
  padding:0 24px;
  height:78px;
  display:flex;
  align-items:center;
  gap:26px;
}

.logo{
  display:inline-flex;
  align-items:center;
  gap:12px;
  font-size:1.12rem;
  font-weight:800;
  letter-spacing:.02em;
  color:var(--ink);
  white-space:nowrap;
}

.logo-icon{
  position:relative;
  width:44px;
  height:44px;
  border-radius:15px;
  display:grid;
  place-items:center;
  color:#fff;
  font-size:.95rem;
  font-weight:800;
  background:linear-gradient(140deg,var(--mint) 0%,#3FD2C0 45%,var(--sky) 100%);
  box-shadow:0 12px 22px -12px rgba(47,199,174,.85), inset 0 1px 0 rgba(255,255,255,.5);
  flex:0 0 auto;
}

.logo-icon::after{
  content:"";
  position:absolute;
  inset:5px;
  border-radius:11px;
  border:1.5px solid rgba(255,255,255,.42);
  pointer-events:none;
}

.main-nav{
  display:flex;
  align-items:center;
  gap:4px;
  margin-left:auto;
}

.main-nav a{
  position:relative;
  padding:9px 16px;
  border-radius:var(--r-pill);
  font-size:.94rem;
  font-weight:500;
  color:var(--ink-2);
  transition:color .25s var(--ease), background .25s var(--ease);
}

.main-nav a::after{
  content:"";
  position:absolute;
  left:50%;
  bottom:3px;
  width:0;
  height:2px;
  border-radius:2px;
  background:linear-gradient(90deg,var(--mint),var(--sky));
  transform:translateX(-50%);
  transition:width .3s var(--ease);
}

.main-nav a:hover{
  color:var(--mint-dark);
  background:var(--mint-mist);
}

.main-nav a:hover::after{
  width:22px;
}

.nav-cta{
  margin-left:10px;
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:11px 24px;
  border-radius:var(--r-pill);
  font-size:.92rem;
  font-weight:700;
  color:#fff;
  background:linear-gradient(135deg,var(--mint),var(--sky));
  box-shadow:0 14px 26px -14px rgba(47,199,174,.9);
  transition:transform .25s var(--ease), box-shadow .25s var(--ease);
}

.nav-cta:hover{
  transform:translateY(-2px);
  box-shadow:0 20px 34px -16px rgba(47,199,174,.95);
}

.menu-toggle{
  display:none;
  width:46px;
  height:46px;
  margin-left:auto;
  padding:0;
  border-radius:15px;
  border:1px solid var(--line-strong);
  background:#fff;
  cursor:pointer;
  position:relative;
  transition:background .25s var(--ease), border-color .25s var(--ease);
}

.menu-toggle::before,
.menu-toggle::after{
  content:"";
  position:absolute;
  left:13px;
  right:13px;
  height:2px;
  border-radius:2px;
  background:var(--mint-deep);
  transition:transform .3s var(--ease), top .3s var(--ease);
}

.menu-toggle::before{top:17px;}
.menu-toggle::after{top:25px;}

.menu-toggle:hover{
  background:var(--mint-mist);
  border-color:var(--mint);
}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  padding:14px 32px;
  border-radius:var(--r-pill);
  font-size:.97rem;
  font-weight:700;
  letter-spacing:.02em;
  border:1px solid transparent;
  cursor:pointer;
  white-space:nowrap;
  transition:transform .28s var(--ease), box-shadow .28s var(--ease), background .28s var(--ease), color .28s var(--ease), border-color .28s var(--ease);
}

.btn:active{transform:translateY(0) scale(.985);}

.btn-primary{
  color:#fff;
  background:linear-gradient(135deg,var(--mint) 0%,#3FD0C6 48%,var(--sky) 100%);
  box-shadow:0 16px 30px -14px rgba(47,199,174,.85), inset 0 1px 0 rgba(255,255,255,.35);
}

.btn-primary:hover{
  transform:translateY(-3px);
  box-shadow:0 24px 42px -18px rgba(47,199,174,.95), inset 0 1px 0 rgba(255,255,255,.5);
}

.btn-outline{
  color:var(--mint-dark);
  background:#fff;
  border-color:var(--line-strong);
  box-shadow:var(--sd-xs);
}

.btn-outline:hover{
  transform:translateY(-3px);
  background:var(--mint-mist);
  border-color:var(--mint);
  box-shadow:var(--sd-sm);
}

/* ============ 首页主视觉 ============ */
.hero{
  position:relative;
  padding:86px 0 100px;
  overflow:hidden;
  background:
    radial-gradient(820px 440px at 8% -12%, #E1F9F3 0%, rgba(225,249,243,0) 68%),
    radial-gradient(760px 420px at 96% -6%, #E3F3FC 0%, rgba(227,243,252,0) 70%),
    linear-gradient(180deg,#FBFEFD 0%, var(--bg) 68%, #FFFFFF 100%);
}

.hero::before{
  content:"";
  position:absolute;
  width:460px;
  height:460px;
  right:-180px;
  bottom:-220px;
  border-radius:50%;
  background:radial-gradient(circle, rgba(87,185,232,.16) 0%, rgba(87,185,232,0) 70%);
  pointer-events:none;
}

.hero::after{
  content:"";
  position:absolute;
  width:8px;
  height:8px;
  left:8%;
  top:120px;
  border-radius:50%;
  background:var(--mint);
  box-shadow:
    46px 60px 0 -2px rgba(47,199,174,.5),
    -30px 130px 0 -3px rgba(87,185,232,.55),
    96px 180px 0 -3px rgba(47,199,174,.35);
  opacity:.85;
  pointer-events:none;
}

.hero-content{
  position:relative;
  z-index:2;
  width:100%;
  max-width:1180px;
  margin:0 auto;
  padding:0 24px;
  display:grid;
  grid-template-columns:1.06fr .94fr;
  gap:60px;
  align-items:center;
}

.hero-eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  padding:8px 20px;
  margin-bottom:24px;
  border-radius:var(--r-pill);
  background:#fff;
  border:1px solid var(--line-strong);
  color:var(--mint-dark);
  font-size:.83rem;
  font-weight:700;
  letter-spacing:.08em;
  box-shadow:var(--sd-xs);
}

.hero-eyebrow::before{
  content:"";
  width:8px;
  height:8px;
  border-radius:50%;
  background:linear-gradient(135deg,var(--mint),var(--sky));
  box-shadow:0 0 0 5px rgba(47,199,174,.14);
}

.hero h1,
.hero-title{
  font-size:clamp(2rem,4.4vw,3.35rem);
  line-height:1.24;
  font-weight:800;
  letter-spacing:-.03em;
  color:var(--ink);
  margin-bottom:22px;
}

.hero p,
.hero-desc{
  font-size:1.03rem;
  line-height:1.95;
  color:var(--ink-2);
  max-width:520px;
  margin-bottom:34px;
}

.hero-buttons{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:16px;
}

.hero-image{
  position:relative;
  border-radius:var(--r-xl);
  overflow:hidden;
  background:
    radial-gradient(circle at 26% 22%, #FFFFFF 0%, rgba(255,255,255,0) 56%),
    linear-gradient(150deg,var(--mint-soft) 0%, #EAF8FF 52%, var(--sky-soft) 100%);
  border:1px solid rgba(255,255,255,.9);
  box-shadow:var(--sd-lg), inset 0 0 0 1px rgba(255,255,255,.7);
  min-height:380px;
  padding:34px;
  display:grid;
  place-items:center;
}

.hero-image::before{
  content:"";
  position:absolute;
  width:220px;
  height:220px;
  top:-70px;
  right:-70px;
  border-radius:50%;
  background:radial-gradient(circle, rgba(47,199,174,.28) 0%, rgba(47,199,174,0) 72%);
}

.hero-image::after{
  content:"";
  position:absolute;
  left:-40px;
  bottom:-60px;
  width:200px;
  height:200px;
  border-radius:50%;
  background:radial-gradient(circle, rgba(87,185,232,.26) 0%, rgba(87,185,232,0) 72%);
}

.hero-image img{
  position:relative;
  z-index:2;
  border-radius:var(--r-lg);
  box-shadow:var(--sd-sm);
}

/* ============ 卡片网格 ============ */
.cards-grid{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(268px,1fr));
  gap:26px;
}

.category-card{
  position:relative;
  overflow:hidden;
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  padding:34px 30px 30px;
  box-shadow:var(--sd-xs);
  transition:transform .34s var(--ease), box-shadow .34s var(--ease), border-color .34s var(--ease);
}

.category-card::before{
  content:"";
  position:absolute;
  top:0;
  left:0;
  right:0;
  height:4px;
  background:linear-gradient(90deg,var(--mint),var(--sky));
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .4s var(--ease);
}

.category-card::after{
  content:"";
  position:absolute;
  width:150px;
  height:150px;
  right:-70px;
  top:-70px;
  border-radius:50%;
  background:radial-gradient(circle, rgba(47,199,174,.14) 0%, rgba(47,199,174,0) 70%);
  transition:transform .5s var(--ease);
}

.category-card:hover{
  transform:translateY(-8px);
  border-color:var(--line-strong);
  box-shadow:var(--sd-md);
}

.category-card:hover::before{transform:scaleX(1);}
.category-card:hover::after{transform:scale(1.35);}

.card-icon{
  width:60px;
  height:60px;
  border-radius:19px;
  display:grid;
  place-items:center;
  margin-bottom:22px;
  font-size:1.45rem;
  color:var(--mint-dark);
  background:linear-gradient(140deg,var(--mint-soft) 0%, var(--sky-soft) 100%);
  border:1px solid rgba(47,199,174,.16);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.9);
  transition:transform .34s var(--ease);
}

.category-card:hover .card-icon{
  transform:translateY(-3px) rotate(-4deg);
}

.category-card h3,
.category-card h4{
  font-size:1.16rem;
  font-weight:800;
  letter-spacing:-.01em;
  margin-bottom:12px;
  color:var(--ink);
}

.category-card p{
  font-size:.94rem;
  line-height:1.88;
  color:var(--ink-2);
  margin-bottom:22px;
}

.card-link{
  display:inline-flex;
  align-items:center;
  gap:9px;
  font-size:.92rem;
  font-weight:700;
  color:var(--mint-deep);
  transition:gap .26s var(--ease), color .26s var(--ease);
}

.card-link::after{
  content:"→";
  font-size:1rem;
  transition:transform .26s var(--ease);
}

.card-link:hover{
  color:var(--sky-deep);
}

.card-link:hover::after{
  transform:translateX(5px);
}

/* ============ 特性区块 ============ */
.feature-block{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:68px;
  align-items:center;
}

.feature-image{
  position:relative;
  border-radius:var(--r-xl);
  overflow:hidden;
  min-height:400px;
  padding:30px;
  display:grid;
  place-items:center;
  background:
    radial-gradient(circle at 78% 18%, rgba(255,255,255,.95) 0%, rgba(255,255,255,0) 58%),
    linear-gradient(160deg,var(--sky-soft) 0%, #EFFBF8 55%, var(--mint-soft) 100%);
  border:1px solid rgba(255,255,255,.9);
  box-shadow:var(--sd-md), inset 0 0 0 1px rgba(255,255,255,.6);
}

.feature-image::before{
  content:"";
  position:absolute;
  inset:18px;
  border-radius:calc(var(--r-xl) - 12px);
  border:1.5px dashed rgba(47,199,174,.28);
  pointer-events:none;
}

.feature-image img{
  position:relative;
  z-index:2;
  border-radius:var(--r-md);
  box-shadow:var(--sd-sm);
}

.feature-text h2,
.feature-text h3{
  font-size:clamp(1.5rem,2.7vw,2.1rem);
  font-weight:800;
  line-height:1.38;
  letter-spacing:-.02em;
  margin-bottom:18px;
  color:var(--ink);
}

.feature-text p{
  font-size:.99rem;
  line-height:1.95;
  color:var(--ink-2);
  margin-bottom:26px;
}

.feature-list{
  display:grid;
  gap:16px;
  margin:0 0 32px;
  padding:0;
}

.feature-list li{
  position:relative;
  padding-left:44px;
  font-size:.95rem;
  line-height:1.8;
  color:var(--ink-2);
}

.feature-list li::before{
  content:"✓";
  position:absolute;
  left:0;
  top:2px;
  width:28px;
  height:28px;
  border-radius:50%;
  display:grid;
  place-items:center;
  font-size:.82rem;
  font-weight:800;
  color:#fff;
  background:linear-gradient(135deg,var(--mint),var(--sky));
  box-shadow:0 8px 16px -8px rgba(47,199,174,.9);
}

.feature-list li strong{
  color:var(--ink);
  font-weight:700;
}

/* ============ 数据条 ============ */
.stats-bar{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:8px;
  padding:46px 26px;
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--r-xl);
  box-shadow:var(--sd-md);
  position:relative;
  overflow:hidden;
}

.stats-bar::before{
  content:"";
  position:absolute;
  top:0;
  left:0;
  right:0;
  height:4px;
  background:linear-gradient(90deg,var(--mint),#4ACED0,var(--sky));
  opacity:.85;
}

.stat-item{
  position:relative;
  text-align:center;
  padding:8px 12px;
}

.stat-item + .stat-item::before{
  content:"";
  position:absolute;
  left:0;
  top:50%;
  transform:translateY(-50%);
  width:1px;
  height:52%;
  background:linear-gradient(180deg,rgba(47,199,174,0),var(--line-strong),rgba(47,199,174,0));
}

.stat-number{
  display:block;
  font-size:clamp(1.75rem,3.6vw,2.6rem);
  font-weight:800;
  line-height:1.2;
  letter-spacing:-.03em;
  background:linear-gradient(135deg,var(--mint-deep) 0%, var(--sky-deep) 100%);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
  margin-bottom:8px;
}

.stat-label{
  display:block;
  font-size:.88rem;
  font-weight:600;
  letter-spacing:.04em;
  color:var(--ink-3);
}

/* ============ 内容墙 ============ */
.content-wall{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(300px,1fr));
  gap:28px;
}

.content-wall-item{
  display:flex;
  flex-direction:column;
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  overflow:hidden;
  box-shadow:var(--sd-xs);
  transition:transform .34s var(--ease), box-shadow .34s var(--ease), border-color .34s var(--ease);
}

.content-wall-item:hover{
  transform:translateY(-7px);
  border-color:var(--line-strong);
  box-shadow:var(--sd-md);
}

.content-wall-item img,
.content-wall-item .wall-media{
  width:100%;
  height:196px;
  object-fit:cover;
  background:linear-gradient(140deg,var(--mint-soft),var(--sky-soft));
}

.content-wall-body{
  padding:26px 28px 30px;
  display:flex;
  flex-direction:column;
  gap:12px;
  flex:1;
}

.content-wall-body h3,
.content-wall-body h4{
  font-size:1.08rem;
  font-weight:800;
  line-height:1.55;
  letter-spacing:-.01em;
  color:var(--ink);
}

.content-wall-body p{
  font-size:.92rem;
  line-height:1.88;
  color:var(--ink-2);
  margin:0;
}

.content-wall-body .card-link{
  margin-top:auto;
  padding-top:6px;
}

.content-wall-body time,
.content-wall-body .meta{
  font-size:.8rem;
  font-weight:600;
  letter-spacing:.08em;
  color:var(--mint-deep);
}

/* ============ 问答 ============ */
.faq-list{
  display:grid;
  gap:16px;
  max-width:860px;
  margin:0 auto;
}

.faq-item{
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--r-md);
  padding:4px 28px;
  box-shadow:var(--sd-xs);
  transition:border-color .3s var(--ease), box-shadow .3s var(--ease), background .3s var(--ease);
}

.faq-item:hover{
  border-color:var(--line-strong);
  box-shadow:var(--sd-sm);
  background:linear-gradient(180deg,#FFFFFF 0%, #FBFEFD 100%);
}

.faq-question{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  padding:20px 0;
  font-size:1rem;
  font-weight:700;
  color:var(--ink);
  cursor:pointer;
  transition:color .26s var(--ease);
}

.faq-question::after{
  content:"+";
  flex:0 0 auto;
  width:30px;
  height:30px;
  border-radius:50%;
  display:grid;
  place-items:center;
  font-size:1.1rem;
  font-weight:600;
  line-height:1;
  color:var(--mint-deep);
  background:var(--mint-soft);
  border:1px solid rgba(47,199,174,.2);
  transition:transform .32s var(--ease), background .32s var(--ease), color .32s var(--ease);
}

.faq-item:hover .faq-question{color:var(--mint-dark);}

.faq-item:hover .faq-question::after{
  transform:rotate(90deg);
  background:linear-gradient(135deg,var(--mint),var(--sky));
  color:#fff;
}

.faq-answer{
  margin:0;
  padding:0 0 22px;
  font-size:.94rem;
  line-height:1.95;
  color:var(--ink-2);
  border-top:1px dashed var(--line-strong);
  padding-top:18px;
}

/* ============ 横幅 ============ */
.cta-banner{
  position:relative;
  overflow:hidden;
  padding:70px 48px;
  border-radius:var(--r-xl);
  text-align:center;
  color:#fff;
  background:linear-gradient(125deg,#2FC7AE 0%, #3FCDBE 38%, #4FB4E2 100%);
  box-shadow:0 40px 80px -40px rgba(20,150,128,.8);
}

.cta-banner::before{
  content:"";
  position:absolute;
  width:380px;
  height:380px;
  top:-190px;
  left:-120px;
  border-radius:50%;
  background:radial-gradient(circle, rgba(255,255,255,.28) 0%, rgba(255,255,255,0) 70%);
}

.cta-banner::after{
  content:"";
  position:absolute;
  width:300px;
  height:300px;
  right:-110px;
  bottom:-160px;
  border-radius:50%;
  background:radial-gradient(circle, rgba(255,255,255,.22) 0%, rgba(255,255,255,0) 70%);
}

.cta-banner h2,
.cta-banner h3{
  position:relative;
  z-index:2;
  font-size:clamp(1.5rem,3vw,2.25rem);
  font-weight:800;
  letter-spacing:-.02em;
  line-height:1.4;
  margin-bottom:14px;
  color:#fff;
}

.cta-banner p{
  position:relative;
  z-index:2;
  font-size:1rem;
  line-height:1.9;
  color:rgba(255,255,255,.92);
  max-width:620px;
  margin:0 auto 32px;
}

.cta-banner .btn{
  position:relative;
  z-index:2;
}

.cta-banner .btn-primary{
  background:#fff;
  color:var(--mint-dark);
  box-shadow:0 18px 34px -18px rgba(4,60,52,.7);
}

.cta-banner .btn-primary:hover{
  background:#F4FFFD;
  color:var(--mint-dark);
}

.cta-banner .btn-outline{
  background:rgba(255,255,255,.12);
  border-color:rgba(255,255,255,.6);
  color:#fff;
  box-shadow:none;
}

.cta-banner .btn-outline:hover{
  background:rgba(255,255,255,.22);
  border-color:#fff;
}

/* ============ 页脚 ============ */
.site-footer{
  position:relative;
  margin-top:96px;
  padding:74px 0 0;
  background:
    radial-gradient(620px 300px at 12% 0%, #E9FAF6 0%, rgba(233,250,246,0) 70%),
    linear-gradient(180deg,#F1FAF8 0%, #EAF6F4 100%);
  border-top:1px solid var(--line);
  color:var(--ink-2);
}

.footer-grid{
  width:100%;
  max-width:1180px;
  margin:0 auto;
  padding:0 24px;
  display:grid;
  grid-template-columns:1.7fr 1fr 1fr 1fr;
  gap:44px;
}

.footer-brand .logo{
  margin-bottom:20px;
}

.footer-brand p{
  font-size:.92rem;
  line-height:1.95;
  color:var(--ink-3);
  max-width:320px;
}

.footer-brand .seo-description{
  margin-top:18px;
  font-size:.82rem;
  line-height:1.95;
}

.footer-col h4{
  font-size:.95rem;
  font-weight:800;
  letter-spacing:.06em;
  color:var(--ink);
  margin-bottom:20px;
  position:relative;
  padding-bottom:12px;
}

.footer-col h4::after{
  content:"";
  position:absolute;
  left:0;
  bottom:0;
  width:26px;
  height:3px;
  border-radius:3px;
  background:linear-gradient(90deg,var(--mint),var(--sky));
}

.footer-col ul{
  display:grid;
  gap:12px;
  margin:0;
  padding:0;
}

.footer-col a{
  font-size:.92rem;
  color:var(--ink-2);
  transition:color .24s var(--ease), padding-left .24s var(--ease);
}

.footer-col a:hover{
  color:var(--mint-dark);
  padding-left:6px;
}

.footer-bottom{
  width:100%;
  max-width:1180px;
  margin:56px auto 0;
  padding:24px 24px 30px;
  border-top:1px solid rgba(47,199,174,.16);
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:14px;
  font-size:.84rem;
  color:var(--ink-3);
}

.footer-bottom p{
  margin:0;
  font-size:.84rem;
}

.footer-bottom a{
  color:var(--ink-3);
  transition:color .24s var(--ease);
}

.footer-bottom a:hover{
  color:var(--mint-deep);
}

/* ============ 响应式 ============ */
@media (max-width:1024px){
  .section{padding:80px 0;}
  .hero{padding:72px 0 84px;}
  .hero-content{
    grid-template-columns:1fr;
    gap:46px;
  }
  .hero p,
  .hero-desc{max-width:100%;}
  .feature-block{
    grid-template-columns:1fr;
    gap:44px;
  }
  .footer-grid{
    grid-template-columns:1.4fr 1fr 1fr;
    gap:36px;
  }
  .footer-brand{
    grid-column:1 / -1;
  }
  .footer-brand p{max-width:520px;}
}

@media (max-width:860px){
  .main-nav{
    position:absolute;
    top:100%;
    left:0;
    right:0;
    display:none;
    flex-direction:column;
    align-items:stretch;
    gap:6px;
    margin:0;
    padding:18px 24px 24px;
    background:rgba(255,255,255,.98);
    border-bottom:1px solid var(--line);
    box-shadow:0 24px 40px -30px rgba(17,140,120,.55);
  }
  .main-nav a{
    padding:13px 16px;
    border-radius:var(--r-sm);
    font-size:.98rem;
  }
  .main-nav a:hover{background:var(--mint-mist);}
  .main-nav a::after{display:none;}
  .nav-cta{
    margin:8px 0 0;
    justify-content:center;
    padding:13px 24px;
  }
  .menu-toggle{display:block;}
  .stats-bar{
    grid-template-columns:repeat(2,1fr);
    padding:34px 18px;
    row-gap:26px;
  }
  .stat-item:nth-child(3)::before,
  .stat-item:nth-child(odd)::before{display:none;}
  .stat-item:nth-child(3),
  .stat-item:nth-child(4){
    border-top:1px dashed var(--line-strong);
    padding-top:22px;
  }
  .cta-banner{
    padding:54px 26px;
    border-radius:var(--r-lg);
  }
}

@media (max-width:640px){
  body{font-size:15px;}
  .container{padding:0 18px;}
  .header-inner{height:70px;padding:0 18px;gap:14px;}
  .logo{font-size:1.02rem;}
  .logo-icon{width:40px;height:40px;border-radius:13px;font-size:.86rem;}
  .section{padding:64px 0;}
  .hero{padding:56px 0 66px;}
  .hero-content{padding:0 18px;gap:38px;}
  .hero-image{min-height:280px;padding:22px;border-radius:var(--r-lg);}
  .hero-buttons{gap:12px;}
  .btn{
    padding:13px 24px;
    font-size:.92rem;
    flex:1 1 auto;
  }
  .section-title{font-size:clamp(1.4rem,6vw,1.85rem);}
  .cards-grid{gap:18px;}
  .category-card{padding:28px 24px 26px;border-radius:var(--r-md);}
  .card-icon{width:52px;height:52px;border-radius:16px;font-size:1.25rem;margin-bottom:18px;}
  .feature-image{min-height:260px;padding:20px;border-radius:var(--r-lg);}
  .stats-bar{grid-template-columns:1fr;padding:28px 16px;row-gap:0;border-radius:var(--r-lg);}
  .stat-item{padding:20px 12px;}
  .stat-item + .stat-item::before{
    display:block;
    left:14%;
    right:14%;
    top:0;
    width:auto;
    height:1px;
    transform:none;
    background:linear-gradient(90deg,rgba(47,199,174,0),var(--line-strong),rgba(47,199,174,0));
  }
  .stat-item:nth-child(3),
  .stat-item:nth-child(4){
    border-top:0;
    padding-top:20px;
  }
  .content-wall{gap:20px;grid-template-columns:1fr;}
  .content-wall-body{padding:22px 22px 26px;}
  .faq-item{padding:4px 20px;}
  .faq-question{font-size:.95rem;padding:17px 0;}
  .cta-banner{padding:44px 22px;border-radius:var(--r-lg);}
  .cta-banner .btn{flex:1 1 100%;}
  .site-footer{margin-top:64px;padding-top:54px;}
  .footer-grid{
    grid-template-columns:1fr;
    gap:32px;
    padding:0 18px;
  }
  .footer-bottom{
    margin-top:40px;
    padding:20px 18px 26px;
    flex-direction:column;
    align-items:flex-start;
    gap:10px;
  }
  .seo-description{font-size:.8rem;}
}

@media (max-width:400px){
  .btn{width:100%;}
  .hero-buttons{flex-direction:column;align-items:stretch;}
}

@media (prefers-reduced-motion:reduce){
  *,
  *::before,
  *::after{
    animation-duration:.001ms !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
}