/* =========================
   设计系统：CSS 变量
   ========================= */
:root{
  --brand: #34c759;            /* 浅绿主色 */
  --brand-2: #22a84b;          /* 深一档 */
  --brand-3: #e9f9ef;          /* 很浅的绿背景 */
  --fg: #0b0f10;               /* 前景色（文本） */
  --muted: #5b666a;            /* 次级文本 */
  --bg: #ffffff;               /* 背景 */
  --card: #ffffff;             /* 卡片背景 */
  --stroke: #e9ecef;           /* 细分割线 */
  --shadow: 0 6px 24px rgba(0,0,0,.08);
  --radius: 14px;
  --radius-sm: 10px;
  --radius-lg: 22px;
  --container: 1200px;

  /* 字号随视口自适应：clamp(最小, 视口比例, 最大) */
  --fs-hero: clamp(28px, 5vw, 48px);
  --fs-h2: clamp(20px, 2.8vw, 28px);
  --fs-body: clamp(14px, 1.4vw, 16px);

  --trans: 220ms cubic-bezier(.22,.61,.36,1);
  --glass: rgba(255,255,255,.55);
  --glass-stroke: rgba(255,255,255,.5);
  --blur: blur(12px);
}

/* 暗色模式（跟随系统） */
@media (prefers-color-scheme: dark){
  :root{
    --fg: #e6eef0;
    --muted: #a8b3b8;
    --bg: #0b0f10;
    --card: #11161a;
    --stroke: #182026;
    --shadow: 0 6px 28px rgba(0,0,0,.35);
    --glass: rgba(17,22,26,.55);
    --glass-stroke: rgba(255,255,255,.08);
  }
}

/* 手动强制主题 */
html[data-theme="light"]{
  --fg:#0b0f10; --muted:#5b666a; --bg:#ffffff; --card:#ffffff; --stroke:#e9ecef;
  --shadow:0 6px 24px rgba(0,0,0,.08); --glass:rgba(255,255,255,.55); --glass-stroke:rgba(0,0,0,.06);
}
html[data-theme="dark"]{
  --fg:#e6eef0; --muted:#a8b3b8; --bg:#0b0f10; --card:#11161a;
  --stroke:#182026; --shadow:0 6cpx 28px rgba(0,0,0,.35);
  --glass:rgba(17,22,26,.55); --glass-stroke:rgba(255,255,255,.08);
}

/* 基础样式重置与排版 */
*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0; font-family: system-ui, -apple-system, Segoe UI, Roboto, "PingFang SC",
  "Hiragino Sans GB","Microsoft YaHei", "Noto Sans CJK SC", Arial, sans-serif;
  color:var(--fg); background:var(--bg); line-height:1.6; font-size:var(--fs-body);
  -webkit-font-smoothing:antialiased; -moz-osx-font-smoothing:grayscale;
}
a{color:inherit; text-decoration:none}
img{max-width:100%; display:block}

/* 通用布局与组件样式 */
.container{width:min(100% - 32px, var(--container)); margin-inline:auto}
.section-title{font-size:var(--fs-h2); margin:0 0 16px}
.flex-group{ display: flex; gap:10px; flex-wrap:wrap }
.grid-group{ display:grid; gap:14px }
.muted{ color:var(--muted) }
.rounded-lg{ border-radius: var(--radius-lg); }

/* 顶部导航 */
.nav{ position:sticky; top:0; z-index:1000;
  background:color-mix(in oklab, var(--bg) 78%, var(--brand-3) 22%);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  border-bottom:1px solid var(--stroke);
}
.nav-inner{ display:flex; align-items:center; gap:16px; padding:12px 0; }
.logo{ display:flex; align-items:center; gap:10px; font-weight:700; letter-spacing:.3px; }
.logo-badge{
  width:40px; height:40px; border-radius:10px;
  background: linear-gradient(135deg, var(--brand), var(--brand-2));
  display:grid; place-items:center; color:white; font-size:14px; box-shadow: var(--shadow);
  background-image: url('https://img.alicdn.com/imgextra/i4/926581449/O1CN01HYJhkX1MZgzAaIRw8_!!926581449.png');
  background-size: 123%; background-repeat: no-repeat; background-position: center;
}
.nav-spacer{flex:1}
.nav-links{display:flex; gap:18px; align-items:center; flex-wrap:wrap}
.nav a.navlink{
  padding:8px 12px; border-radius:10px; transition: background var(--trans), color var(--trans);
}
.nav a.navlink:hover{ background: color-mix(in oklab, var(--brand-3) 60%, var(--bg)); }
.theme-toggle{
  border:1px solid var(--stroke); background:var(--card); color:var(--fg);
  padding:8px 12px; border-radius:12px; cursor:pointer;
  transition: transform var(--trans), background var(--trans), border-color var(--trans);
}
.theme-toggle:hover{ transform: translateY(-1px); }

/* 英雄区 */
.hero{ position:relative; overflow:hidden;
  background:
    radial-gradient(1200px 600px at 10% -10%, color-mix(in oklab, var(--brand) 24%, transparent) 0%, transparent 60%),
    radial-gradient(900px 480px at 90% 0%, color-mix(in oklab, var(--brand) 14%, transparent) 0%, transparent 70%),
    linear-gradient(180deg, color-mix(in oklab, var(--brand-3) 55%, var(--bg) 45%), var(--bg));
}
.hero-inner{ display:grid; align-items:center; grid-template-columns: 1.1fr .9fr;
  gap: clamp(16px, 4vw, 48px); padding: clamp(28px, 6vw, 88px) 0; }
.hero h1{font-size:var(--fs-hero); line-height:1.2; margin:0 0 10px}
.hero p{margin:0 0 24px; color:var(--muted)}
.btn{ --_bg: var(--brand); --_fg: white;
  display:inline-flex; align-items:center; gap:10px; border:0; cursor:pointer;
  padding:12px 18px; border-radius:14px; background:var(--_bg); color:var(--_fg);
  box-shadow: var(--shadow); transition: transform var(--trans), box-shadow var(--trans), opacity var(--trans), background var(--trans);
}
.btn:hover{ transform: translateY(-1px); }
.btn.ghost{ --_bg: transparent; --_fg: var(--brand);
  outline:1px solid color-mix(in oklab, var(--brand) 45%, var(--stroke)); box-shadow:none; }
.hero-art{ aspect-ratio: 4/3; border-radius: var(--radius-lg);
  background:
    linear-gradient(135deg, color-mix(in oklab, var(--brand) 16%, transparent), transparent 60%),
    linear-gradient(180deg, color-mix(in oklab, var(--bg) 65%, var(--brand-3) 35%), var(--card));
  border:1px solid var(--stroke); position:relative; box-shadow: var(--shadow);
  display: flex; flex-direction: column; justify-content: space-around; align-items: flex-start; padding: 30px;
}
.hero-art-link { display: flex; align-items: center; gap: 10px; padding: 10px 14px;
  border-radius: 999px; background: var(--glass); color: var(--fg);
  border: 1px solid var(--glass-stroke); backdrop-filter: var(--blur);
  text-decoration: none; transition: transform var(--trans), box-shadow var(--trans); width: fit-content;
}
.hero-art-link:hover { transform: translateY(-2px); box-shadow: var(--shadow); }
.hero-art-link .icon-arrow { width: 24px; height: 24px; display: grid; place-items: center;
  border-radius: 50%; background: var(--brand); color: white; font-size: 14px; transition: background var(--trans); }
.hero-art-link:hover .icon-arrow { background: var(--brand-2); }
.dot{width:10px; height:10px; border-radius:99px; background: linear-gradient(135deg, var(--brand), var(--brand-2)); box-shadow:var(--shadow)}

/* 特性区 */
.features{ padding: clamp(1px, 0.5vw, 4px) 0 clamp(36px, 5vw, 72px);
  background: color-mix(in oklab, var(--brand-3) 35%, var(--bg)); }
.grid-3{ display:grid; gap:18px; grid-template-columns: repeat(3, minmax(0,1fr)); }
@media (max-width: 960px){
  .hero-inner{ grid-template-columns: 1fr; }
  .grid-3{ grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px){ .grid-3{ grid-template-columns: 1fr; } }
.card{ background: var(--card); border:1px solid var(--stroke); border-radius: var(--radius);
  padding: clamp(16px, 3.5vw, 22px); box-shadow: var(--shadow);
  transition: transform var(--trans), border-color var(--trans), box-shadow var(--trans);
}
.card:hover{ transform: translateY(-2px); border-color: color-mix(in oklab, var(--brand) 35%, var(--stroke)); }
.icon{ width:40px; height:40px; border-radius:10px; display:grid; place-items:center; margin-bottom:10px;
  background: linear-gradient(135deg, var(--brand), var(--brand-2)); color:white; font-weight:700; box-shadow: var(--shadow); }
.card h3{font-size:18px; margin:6px 0 6px}
.card p{margin:0; color:var(--muted)}

/* 服务区 */
.services{ padding: clamp(36px, 5vw, 72px) 0;
  display:grid; gap:24px; grid-template-columns: 1.2fr .8fr; }
@media (max-width: 960px){ .services{ grid-template-columns: 1fr; } }
.list{ display:grid; gap:14px; }
.list-item{ display:flex; gap:14px; align-items:flex-start;
  padding:14px; border:1px dashed color-mix(in oklab, var(--brand) 35%, var(--stroke));
  background: color-mix(in oklab, var(--brand-3) 35%, var(--bg)); border-radius: var(--radius-sm);
}
.badge{ font-size:12px; padding:4px 10px; border-radius:999px; background: var(--brand); color:white; white-space:nowrap }
.meter{ height:10px; border-radius:999px; background: color-mix(in oklab, var(--bg) 70%, var(--stroke) 30%);
  overflow:hidden; border:1px solid var(--stroke); }
.meter > i{ display:block; height:100%; width: var(--val, 60%);
  background: linear-gradient(90deg, var(--brand), var(--brand-2));
  border-radius:999px; transform-origin:left; animation: grow 1.2s var(--trans) both; }
@keyframes grow{ from{ transform: scaleX(.2) } to{ transform: scaleX(1) } }

/* CTA 条（横幅全宽） */
.container.cta {
  width: 100%;
  max-width: 100%;
  margin: clamp(36px, 6vw, 88px) 0;
  border-radius: 0; /* 铺满屏时去掉圆角 */
  padding: clamp(22px, 4.2vw, 38px) 0;
  background:
    linear-gradient(135deg, color-mix(in oklab, var(--brand) 42%, transparent), transparent 60%),
    color-mix(in oklab, var(--brand-3) 60%, var(--bg) 40%);
  border-top:1px solid var(--stroke);
  border-bottom:1px solid var(--stroke);
  box-shadow: var(--shadow);
}
.container.cta > div { /* 内部内容对齐 container */
  width:min(100% - 32px, var(--container));
  margin:0 auto;
  display:grid; gap:12px; align-items:center; grid-template-columns: 1fr auto;
}
@media (max-width: 640px){
  .container.cta > div{ grid-template-columns: 1fr; gap:16px; text-align:center; }
}
.container.cta p{margin:0; color:var(--muted)}

#contact{ background: color-mix(in oklab, var(--brand-3) 60%, var(--bg)); }

/* 关于我们 */
.about-section { padding: 60px 20px; background:linear-gradient(135deg,#d8f9e4,#f3fff8); }
.about-content { display:grid; gap:40px; align-items:center; grid-template-columns:1fr 1fr; max-width:1000px; }
.about-content h2 { font-size:2.2rem; margin:0 0 16px; color:#1b5e20; }
.about-content p { margin:0 0 12px; color:#333; line-height:1.6; }
.about-content p:last-of-type { margin-bottom: 20px; color:#555; }

/* 联系我们 */
.contact-section { padding:60px 20px; }
.contact-content { display:grid; grid-template-columns:1fr 1fr; gap:40px; align-items:center; max-width:1000px; }
.contact-content .card { display:grid; gap:20px; }
.contact-content .contact-image { text-align:center; }
.contact-content .contact-image img { width:100%; border-radius:16px; box-shadow:0 6px 24px rgba(0,0,0,.12); }
.contact-form { display:grid; gap:14px; }
.form-group { display:grid; gap:6px; }
.form-input, .form-textarea { padding:10px 12px; border-radius:10px; border:1px solid var(--stroke); background:var(--bg); color:var(--fg); }
.contact-form h3 { margin:0; font-size:1.6rem; text-align:center; }
.btn-group { display:flex; gap:10px; justify-content:center; flex-wrap:wrap; }

/* 页脚 */
footer{ padding: 36px 0 48px; border-top:1px solid var(--stroke);
  background: color-mix(in oklab, var(--bg) 85%, var(--brand-3) 15%); }
.foot{ display:flex; gap:18px; align-items:center; flex-wrap:wrap; justify-content:space-between; }
.foot small{ color:var(--muted) }

/* 装饰 */
.wave{ display:block; width:100%; height:auto; mix-blend-mode:soft-light; opacity:.65 }

/* 焦点样式 */
:focus-visible{ outline: 2px solid color-mix(in oklab, var(--brand) 60%, #66a); outline-offset: 2px; border-radius: 8px; }

/* 统一图片尺寸 */
.about-content .about-image { text-align: center; }
.about-content .about-image img { width: 100%; border-radius: 16px; box-shadow: 0 6px 24px rgba(0,0,0,.12); }

/* 移动端优化 */
@media (max-width: 960px) {
  .about-content, .contact-content { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  .nav-inner { flex-direction: column; align-items: flex-start; }
  .nav-spacer { display: none; }
  .nav-links { width: 100%; justify-content: space-around; margin-top: 10px; }
  .foot { flex-direction: column; align-items: center; text-align: center; }
  .foot > div { margin-bottom: 8px; }
}
/* ============ 电脑端 contact 图片与 about 图片等高 ============ */
@media (min-width: 961px) {
  .contact-content {
    align-items: stretch;    /* 两列等高 */
  }
  .contact-content .contact-image img {
    height: 100%;            /* 填满父容器高度 */
    object-fit: cover;       /* 裁剪填充，避免变形 */
  }
}