/*
  视觉基调：黑白克制 + 轻微暖金强调（更像“真实产品官网”而非模板站）
*/

:root{
  --bg: #ffffff;
  --bg-elev: rgba(255,255,255,.72);
  --text: #0b0f17;
  --muted: rgba(11, 15, 23, .66);
  --muted-2: rgba(11, 15, 23, .48);
  --line: rgba(11, 15, 23, .10);
  --line-2: rgba(11, 15, 23, .14);
  --shadow: 0 18px 60px rgba(11, 15, 23, .10);

  --accent: #b9892a;           /* 暖金点缀 */
  --accent-2: #d3b26b;         /* 更亮一点用于渐变 */
  --accent-soft: rgba(185,137,42,.12);

  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 12px;

  --container: 1160px;
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a{color:inherit; text-decoration:none}
button{font:inherit}

.container{
  width: min(var(--container), calc(100% - 48px));
  margin: 0 auto;
}

.skip{
  position:absolute;
  left:-999px;
  top:auto;
  width:1px;
  height:1px;
  overflow:hidden;
}
.skip:focus{
  left:16px;
  top:16px;
  width:auto;
  height:auto;
  padding:10px 12px;
  background:#fff;
  border:1px solid var(--line-2);
  border-radius:10px;
  box-shadow: var(--shadow);
  z-index:9999;
}

/* 顶部导航 */
.header{
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  background: rgba(255,255,255,.68);
  border-bottom: 1px solid rgba(11, 15, 23, .08);
}
.header-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding: 14px 0;
  gap: 16px;
}
.brand{
  display:flex;
  align-items:center;
  gap:0px;
  min-width: 240px;
}
.brand-logo{
  flex: 0 0 auto;
  width: 170px;
  height: 39px;
  display:block;
  object-fit: contain;
}
.brand-text{
  display:flex;
  flex-direction:column;
  justify-content:center;
  min-width: 0;
  margin-left: -7px;
}
.brand-title{
  font-weight: 800;
  letter-spacing: .2px;
  font-size: 15px;
  line-height: 1.1;
}
.brand-sub{
  font-size: 12px;
  color: var(--muted);
  margin-top: 2px;
}

.nav{
  display:flex;
  align-items:center;
  gap: 18px;
  flex: 1 1 auto;
  justify-content: center;
}
.nav a{
  font-size: 13px;
  color: var(--muted);
  padding: 8px 10px;
  border-radius: 12px;
}
.nav a:hover{
  background: rgba(11, 15, 23, .04);
  color: var(--text);
}

.header-actions{
  display:flex;
  align-items:center;
  gap: 10px;
  min-width: 240px;
  justify-content: flex-end;
}
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap: 8px;
  height: 40px;
  padding: 0 14px;
  border-radius: 999px;
  border: 1px solid var(--line-2);
  background: #fff;
  color: var(--text);
  white-space: nowrap;
  box-shadow: 0 8px 24px rgba(11, 15, 23, .06);
  transition: transform .12s ease, box-shadow .12s ease, background .12s ease;
}
.btn:hover{
  transform: translateY(-1px);
  box-shadow: 0 14px 34px rgba(11, 15, 23, .10);
}
.btn:active{transform: translateY(0)}
.btn-primary{
  border-color: rgba(185,137,42,.35);
  background:
    radial-gradient(120% 160% at 20% 10%, rgba(255,255,255,.55), rgba(255,255,255,0) 60%),
    linear-gradient(135deg, rgba(185,137,42,.98), rgba(211,178,107,.92));
  color: #ffffff;
  text-shadow: 0 1px 1px rgba(0,0,0,.18);
}
.btn-ghost{
  background: rgba(255,255,255,.55);
}

.menu{
  display:none;
}

/* 首屏海报 */
.hero{
  position: relative;
  padding: 68px 0 42px;
  overflow:hidden;
}
.hero::before{
  content:"";
  position:absolute;
  inset:-2px;
  background:
    radial-gradient(900px 480px at 20% 10%, rgba(185,137,42,.12), rgba(185,137,42,0) 70%),
    radial-gradient(800px 420px at 78% 22%, rgba(11,15,23,.06), rgba(11,15,23,0) 70%),
    linear-gradient(180deg, rgba(11,15,23,.02), rgba(11,15,23,0) 40%);
  pointer-events:none;
}
.hero-grid{
  display:grid;
  grid-template-columns: 1fr;
  gap: 28px;
  align-items: stretch;
  position: relative;
}

.hero-left{
  padding: 26px 0;
}
.kicker{
  display:inline-flex;
  align-items:center;
  gap: 8px;
  font-size: 12px;
  color: rgba(11,15,23,.72);
  background: rgba(185,137,42,.10);
  border: 1px solid rgba(185,137,42,.18);
  padding: 7px 10px;
  border-radius: 999px;
}
.kicker-dot{
  width: 6px; height: 6px;
  border-radius: 50%;
  background: linear-gradient(180deg, var(--accent), var(--accent-2));
  box-shadow: 0 0 0 4px rgba(185,137,42,.10);
}

.hero-title{
  margin: 18px 0 10px;
  font-weight: 900;
  letter-spacing: -.6px;
  line-height: 1.12;
  font-size: clamp(34px, 4.2vw, 54px);
}
.hero-title .line{
  display:block;
  margin-top: 6px;
}
.hero-title .line:first-child{
  margin-top: 0;
}
.hero-title .line strong{
  font-weight: 900;
}
.hero-title .accent{
  background: linear-gradient(135deg, rgba(185,137,42,.98), rgba(211,178,107,.88));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero-desc{
  margin: 10px 0 18px;
  color: var(--muted);
  line-height: 1.75;
  font-size: 15px;
  max-width: 46ch;
}
.hero-cta{
  display:flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 18px;
}
.hero-meta{
  display:flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-top: 18px;
  color: var(--muted-2);
  font-size: 12px;
}
.hero-meta span{
  display:inline-flex;
  align-items:center;
  gap: 8px;
}
.hero-meta i{
  width: 18px;
  height: 18px;
  border-radius: 6px;
  display:inline-block;
  background: rgba(11,15,23,.06);
  border: 1px solid rgba(11,15,23,.08);
}

.hero-right{
  position: relative;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(11, 15, 23, .10);
  background:
    radial-gradient(120% 100% at 30% 20%, rgba(185,137,42,.22), rgba(185,137,42,0) 60%),
    linear-gradient(135deg, rgba(11,15,23,.06), rgba(11,15,23,.02));
  box-shadow: var(--shadow);
  overflow:hidden;
}
.poster{
  height: 100%;
  padding: 18px;
  display:flex;
  flex-direction:column;
  gap: 14px;
}
.poster-top{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap: 12px;
}
.poster-badge{
  font-size: 12px;
  color: rgba(11,15,23,.70);
  background: rgba(255,255,255,.62);
  border: 1px solid rgba(11,15,23,.10);
  padding: 7px 10px;
  border-radius: 999px;
}
.poster-chip{
  font-size: 12px;
  color: rgba(11,15,23,.74);
  background: rgba(185,137,42,.10);
  border: 1px solid rgba(185,137,42,.18);
  padding: 7px 10px;
  border-radius: 999px;
}
.poster-hero{
  padding: 18px 16px 14px;
  border-radius: 16px;
  background: rgba(255,255,255,.62);
  border: 1px solid rgba(11,15,23,.10);
}
.poster-hero h3{
  margin:0;
  font-size: 18px;
  letter-spacing: -.2px;
  line-height: 1.2;
}
.poster-hero p{
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.65;
}
.poster-list{
  display:grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}
.poster-item{
  padding: 12px 12px;
  border-radius: 14px;
  background: rgba(255,255,255,.56);
  border: 1px solid rgba(11,15,23,.10);
}
.poster-item .t{
  font-weight: 800;
  font-size: 13px;
}
.poster-item .d{
  margin-top: 6px;
  font-size: 12px;
  color: var(--muted);
  line-height: 1.6;
}

/* 通用区块 */
.section{
  padding: 56px 0;
}
.section-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap: 18px;
  margin-bottom: 20px;
}
.section-title{
  margin:0;
  font-size: 26px;
  letter-spacing: -.3px;
}
.section-desc{
  margin: 6px 0 0;
  color: var(--muted);
  line-height: 1.75;
  max-width: 62ch;
  font-size: 14px;
}
.section-note{
  font-size: 12px;
  color: var(--muted-2);
}

.grid{
  display:grid;
  gap: 14px;
}
.grid-3{ grid-template-columns: repeat(3, 1fr); }
.grid-2{ grid-template-columns: repeat(2, 1fr); }

.card{
  border-radius: var(--radius-lg);
  background: rgba(255,255,255,.76);
  border: 1px solid rgba(11,15,23,.10);
  box-shadow: 0 14px 46px rgba(11,15,23,.06);
  overflow:hidden;
}
.card-inner{
  padding: 18px 18px 16px;
}
.card-title{
  font-weight: 900;
  letter-spacing: -.2px;
  margin: 0;
  font-size: 15px;
}
.card-desc{
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.7;
}
.card-list{
  margin: 12px 0 0;
  padding:0;
  list-style:none;
  display:flex;
  flex-direction:column;
  gap: 8px;
  color: rgba(11,15,23,.78);
  font-size: 13px;
}
.card-list li{
  display:flex;
  gap: 10px;
  align-items:flex-start;
}
.tick{
  width: 18px; height: 18px;
  border-radius: 6px;
  background: rgba(185,137,42,.12);
  border: 1px solid rgba(185,137,42,.20);
  flex: 0 0 auto;
  position: relative;
  margin-top: 1px;
}
.tick::after{
  content:"";
  position:absolute;
  left: 5px;
  top: 4px;
  width: 7px;
  height: 4px;
  border-left: 2px solid rgba(185,137,42,.95);
  border-bottom: 2px solid rgba(185,137,42,.95);
  transform: rotate(-45deg);
}

/* 价格 */
.pricing{
  background:
    radial-gradient(900px 420px at 10% 30%, rgba(185,137,42,.10), rgba(185,137,42,0) 65%),
    radial-gradient(900px 420px at 90% 30%, rgba(11,15,23,.05), rgba(11,15,23,0) 65%);
  border-top: 1px solid rgba(11,15,23,.06);
  border-bottom: 1px solid rgba(11,15,23,.06);
}
.price-card{
  position: relative;
}
.price-top{
  display:flex;
  align-items:flex-start;
  justify-content:space-between;
  gap: 12px;
}
.price-name{
  font-weight: 950;
  font-size: 16px;
  margin: 0;
}
.tag{
  font-size: 12px;
  color: rgba(11,15,23,.70);
  border: 1px solid rgba(11,15,23,.12);
  background: rgba(255,255,255,.62);
  padding: 6px 10px;
  border-radius: 999px;
  white-space:nowrap;
}
.tag-hot{
  border-color: rgba(185,137,42,.22);
  background: rgba(185,137,42,.10);
}
.price{
  margin-top: 10px;
  display:flex;
  align-items:baseline;
  gap: 8px;
}
.price .num{
  font-size: 30px;
  font-weight: 950;
  letter-spacing: -.6px;
}
.price .unit{
  color: var(--muted);
  font-size: 13px;
}
.price-sub{
  margin-top: 8px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.7;
}
.price-actions{
  display:flex;
  gap: 10px;
  margin-top: 14px;
  flex-wrap: wrap;
}
.divider{
  height: 1px;
  background: rgba(11,15,23,.10);
  margin: 14px 0;
}

/* FAQ */
.faq{
  border-top: 1px solid rgba(11,15,23,.06);
}
.qa{
  padding: 16px 18px;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(11,15,23,.10);
  background: rgba(255,255,255,.76);
  box-shadow: 0 14px 46px rgba(11,15,23,.06);
}
.qa summary{
  cursor:pointer;
  font-weight: 900;
  list-style: none;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap: 12px;
}
.qa summary::-webkit-details-marker{display:none}
.qa summary .q{
  font-size: 14px;
}
.qa summary .chev{
  width: 24px;
  height: 24px;
  border-radius: 10px;
  border: 1px solid rgba(11,15,23,.10);
  background: rgba(11,15,23,.03);
  display:inline-flex;
  align-items:center;
  justify-content:center;
  transition: transform .15s ease;
}
.qa[open] summary .chev{ transform: rotate(180deg); }
.qa p{
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.75;
}

/* 页脚 */
.footer{
  padding: 34px 0;
  color: var(--muted);
  font-size: 12px;
}
.footer-top{
  display:flex;
  justify-content:space-between;
  gap: 18px;
  flex-wrap: wrap;
  border-top: 1px solid rgba(11,15,23,.08);
  padding-top: 18px;
}
.footer strong{color: rgba(11,15,23,.82)}
.footer-links{
  display:flex;
  gap: 12px;
  flex-wrap:wrap;
}
.footer-links a{
  color: var(--muted);
}
.footer-links a:hover{color: var(--text)}

/* 浮动试用按钮（移动端更友好） */
.float-cta{
  position: fixed;
  right: 16px;
  bottom: 16px;
  z-index: 60;
  display:none;
}

/* 响应式 */
@media (max-width: 980px){
  .nav{display:none}
  .menu{display:inline-flex}
  .brand{min-width:auto}
  .header-actions{min-width:auto}
  .hero{padding: 54px 0 28px}
  .hero-grid{grid-template-columns: 1fr; }
  .poster{min-height: 340px}
  .grid-3{grid-template-columns: 1fr}
  .grid-2{grid-template-columns: 1fr}
  .float-cta{display:block}
}

@media (max-width: 520px){
  .header-inner{
    padding: 10px 0;
    gap: 10px;
  }
  .brand{
    gap: 1px;
  }
  .brand-text{
    margin-left: -6px;
  }
  .brand-logo{
    width: 170px;
    height: 39px;
  }
  .brand-title{
    font-size: 13px;
  }
  .brand-sub{
    display:none;
  }
  .header-actions{
    gap: 8px;
  }
  .btn{
    height: 36px;
    padding: 0 12px;
    font-size: 13px;
  }
  .poster{
    padding: 14px;
  }
  .poster-list{
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: reduce){
  .btn, .qa summary .chev{transition:none}
  html:focus-within{scroll-behavior:auto}
}